SKU: DCS-12V-75Ah
DCS 12V 75AH (LITHIUM)

safe

Ultra-Safe

Explosion-proof / No leakage

stable

Stable

Low Internal Resistance / Proven Stability

long

Long Life

Ultra-long cycle life

guarentee

Guaranteed A Grade

Contracted A Grade cell supply

DCS Batteries are the ideal replacement & upgrade from AGM, Gel or other lead-acid batteries for any application. DCS gives you the ability to upgrade your current batteries to lithium-ion technology that can deliver a minimum of 2500 cycles and has tremendous advantages in weight, performance, reliability and service life compared to traditional lead-acid batteries.

Backed by a 4 year warranty.

Availability: In Stock (Only RHP)

Original price was: $1,099.00.Current price is: $999.00.

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The DCS 75Ah batteries come in a small footprint and pack a big punch with a 2C discharge rate, which means these little batteries can run a 1800W inverter!

  • Cell status showing real-time cell balancing operation
  • BMS MOSFET temperature (great info when you are winching or running a large inverting load or your trolling motor to know how hard you are pushing the electronics).
  • SOC% estimate (using impedance tracking – the App learns the SOC after the first 10 cycles)
  • Battery pack voltage and cycle count
  • Amp meter – showing charge and discharge current
  • Connectivity distance up to 10m
  • Now there is no need to install battery monitors or shunts in boats, campers or vehicles. You have all the info you need at your fingertips.
  • The SOC estimate is accurate on single batteries, the more batteries that are expanded in parallel, the less accurate the SOC becomes.
  • This free application provides the perfect tell-tale about the battery packs’ state of health as it ages
  • Assists installers & integrators to quickly diagnose any system issues

DCS 6AWG 230mm Parallel Cables with M8 Ring Terminals

300x300

Click Here for more information

What will a DCS 12V 75Ah battery run?

Specifications:
Nominal Voltage 12.8V
Nominal Capacity (1Hr) 75Ah
Case Dimensions (L x W x H) 260mm x 169mm x 175mm
Weight 8.60 Kgs
Cycling voltage 11.5 ~ 14.6V
Charge voltage 14.0 ~ 14.6V
Float Voltage 13.5 ~ 13.7V
Maximum Charge Current 75A
Recommended Charge Current ≤50A
Maximum Discharge Current ≤150A
DCS BMS (internal) DCS active cell management system, over/under voltage, over current charge/discharge, low/high temperature protections, satisfies the AS/NZS 3001.2:2022 lithium battery standards
Cell Chemistry DCS 3.2V 5.0 – 7.2Ah Cylindrical (LiFePO4)
Cycle Performance 2500 Cycles @ 100% DOD ≥ 80% Capacity Retention @ 25°C
LCA 750
Ingress Protection IP54
Case ABS (flame retardant plastic)
Operating temp Range -30 to +110 degrees C
Terminals Top Mount M8 Stainless steel / Copper
Parallel Connections Up To 10
Series Connections No
Warranty 4 years | 3 years under bonnet
Certifications UN 38.3, UL 1642, IEC 62133 & 62619, CE

DCS High Performance 2C Charge & Discharge Curves

DOWNLOAD APP (DCS LFP)

DCS Bluetooth Technology powered by DCS LFP, this APP is only for DCS LFP batteries which is based on BLE 4.0 technology. Every DCS battery pack comes standard with our detailed battery monitoring via Bluetooth.

This App provides comprehensive monitoring for DCS LFP batteries, including:

  • SOC%
  • Time Remaining
  • Battery pack voltage, Power & Current
  • Battery Management MOSFET temperature
  • Individual Cell Status with balancing indicators.
  • Connectivity distance up to 10 meters.
  • Every DCS battery pack comes standard with our detailed battery monitoring via Bluetooth

Learn More About the DCS LFP APP

Click Here to Watch the App Overview Video

HIGH-QUALITY AND RELIABLE 75AH LITHIUM BATTERY FOR POWER AND BACKUP

Research and innovation in the battery world lead to a new generation battery version, improving backup battery banks’ stability. The earlier battery storage devices were bulky, inefficient and required continuous maintenance checks. The earliest battery bank used acid or distilled water-filled through its vents, and they need to be placed in a ventilated place to avoid any problem. The latest 75ah lithium battery by Deep Cycle Systems is all you need to power your electrical appliances, either connected with a grid or going off-grid.

Lithium-Ion Battery Technology

The flooded-acid battery is still the most in service as it has been in service for over a century and a half. Since its invention in the early 1990s, the feature-rich lithium battery technology has captured a major market share due to its compatibility with a variety of applications. The modern features of a lithium-ion battery make it 5x efficient. It’s not a wonder that lithium batteries are part of almost every energy-hungry application with small to large power devices including, smartwatches, mobile phones, laptops, power tools, cameras, vehicles, military installations, medical equipment, aerospace, mobile food shops, media vans, campervans and solar systems.

Deep Cycle Battery

Lithium technology is reliable and offers deep-cycle lithium-ion battery units to either power individual electronic devices or power the entire home. As our name suggests, we are the best manufacturer of Deep Cycle Batteries built for heavy-duty performance 24/7. Our technology is robust enough to withstand the tough Australian weather conditions of the desert, so installing lithium batteries in any part of the country isn’t challenging. You can use a lithium battery as a starter battery due to its ability to provide high initial power and later use it as a regular deep cycle battery for power backup.

Maintenance-Free Battery

You need not worry about maintenance checkups, as our batteries are maintenance-free. Lithium batteries are free from adding up distilled water regularly to save battery cells from damage, like flooded acid batteries.

Virtual Control

You are empowered to monitor and control various battery parameters using your mobile phone by connecting the power system via Bluetooth. Using a SmartSolar MPPT charge controller for your lithium battery, you have access to observe the battery performance, i.e. ampere-hours produced and consumed, can connect or disconnect loads and battery in certain conditions, i.e. under and overvoltage. The SmartSolar also provides safety to the battery in case of the high temperature of battery cells.

We are concerned about your safety; our battery production and other energy products have passed all the tough and challenging exams, certifications and benchmarks set by relevant safety departments. We use a three-stage charging method for our lithium batteries, including bulk charging, absorption, and float mode. Our MPPT charger ensures maximum power points tracking, resulting in a quick battery charge. MPPT is best for extracting every bit of available solar energy; it is the best and the only option for high efficiency even in the cloudy and winter season.

Battery Ampere Hours

Ampere hours are the capacity you want from your battery bank to power a certain amount of load. The ampere-hours of a battery depend on some circumstances, i.e. total load to power, backup time in hours and battery voltage. We can calculate the battery ampere-hours by multiplying the total load by hours and dividing it by battery voltage. For example, if you want to power devices of 225 watts for four hours with a 12v battery, you need a 75ah lithium battery to operate the devices smoothly.

75ah deep cycle batteryEnjoy Thousands Of Life Cycles Of A 75ah Deep Cycle Battery

The lead-acid batteries are recommended for a maximum of 50% discharge, which means that you can’t utilize the full potential of a lead-acid battery. A 75ah deep cycle battery will constantly provide you with more power without dropping voltage levels. That is the main reason for the quick success of such battery banks.

Batteries are crucial when using power, especially for portable devices, or when you want energy backup for your home or work site. The technological advancement in batteries allowed us to choose from a range of battery packs. A deep cycle battery has become the majority’s demand due to its unmatchable features compared with a traditional lead-acid battery. Deep cycle batteries are replacing outdated technology. We can find them in stock, where the need for small, medium and extensive power usages are required, i.e., mobile devices, laptops, power tools, vehicles, marine boats, aerospace, and military projects. The reason for the exponential popularity of deep cycle batteries is the ability to provide a deep discharge of up to 90%, which was impossible a couple of decades ago.

Deep Cycle Systems is a leader in the Australian energy market, serving families with affordable yet reliable and premium quality energy products to provide the best user experience. Our battery stockpile includes top-notch deep cycle battery collection meant for a longer life span that could be a decade. Our customers are happy that they got battery banks that can withstand harsh weather conditions, i.e., can operate in a temperate range between 5 to 60 degrees Celsius. These systems are maintenance-free to offer you a decade of service life.

Our deep cycle battery packs are lithium-based, known for their quality, deep discharge ability, quick charge time, and low self-discharge with under 3% of self-discharge during a month (depends on charge status).

75ah deep cycle batteryWhat is a Charge Cycle?

A charge cycle refers to a procedure where a battery needs a charging aid and, after a full charge, discharges it to power certain AC loads. The charge cycle indicates the expected battery life. Typically, a deep cycle battery has thousands of charge cycles that make years of expected life in given circumstances. A deep discharge means using the battery’s full potential to utilize maximum output from it.

Voltage Level

A deep cycle battery is rated in two terms, i.e., ampere-hours and voltage level. A 75ah deep cycle battery tells the current supply to AC loads, while the voltage level describes the range of applications it can support. Typically, a 12v battery is used for most electrical appliances at home or in commercial use. 24v and 48v batteries are more common for motor vehicles, RVs, electric vehicles, and where more power is required for more significant projects.

75 Ah Lithium Battery for Engine Starting

At Deep Cycle Systems (DCS), we’ve engineered our 75 Ah Lithium Battery specifically for engine starting. We understand the importance of reliability when it comes to starting your engine, and our battery is designed to deliver consistent, high-quality performance. With our battery, you can trust that your engine will start swiftly and efficiently every time. We’ve built this battery to provide the high burst of energy needed for engine starting, ensuring that you have the power when you need it most.

75 Ah Lithium BatteryDependable Engine Start with Our Advanced Technology

Our 75 Ah Lithium Battery is more than just a battery; it’s a promise of reliability. When you choose DCS, you’re choosing a battery that’s designed with your needs in mind. Whether it’s for your car, boat, or any engine-starting application, our battery provides the assurance that your engine will start smoothly, even in demanding conditions.

12v 75ah Deep Cycle Battery – Ideal for Backup Energy Storage Requirements

Our 12v 75ah Deep Cycle Battery at Deep Cycle Systems is perfectly suited for your backup energy storage requirements. We understand that having a reliable power source is crucial for your peace of mind. That’s why we’ve developed a battery that not only meets but exceeds your expectations for backup energy. Our deep cycle battery offers long-lasting power, ensuring that you have the energy you need whenever you need it. It’s an ideal solution for home backup systems, emergency power, or any situation where reliable energy storage is essential.

12v 75ah Deep Cycle BatteryPower Security in Your Hands

With our 12v 75ah Deep Cycle Battery, you gain the power and security you deserve. We ensure that your energy needs are met with reliability and efficiency. You can rest easy knowing that our battery is safeguarding your power requirements and keeping your essential devices running smoothly during power outages or other emergencies.

12v 75ah Lithium Battery – Get 750 Lithium Cranking Amps for Engine Cranking

At Deep Cycle Systems, we’re proud to offer our 12v 75ah Lithium Battery, capable of delivering an impressive 750 lithium cranking amps for engine cranking. We know that starting your engine is about more than just turning a key; it’s about the confidence that your vehicle will respond when you need it to. That’s why our battery is designed to provide robust and reliable power for engine cranking. With our 12v 75ah Lithium Battery, you can expect a high-performance engine to start every time.

Unmatched Cranking Power When You Need It

Our commitment at DCS is to enhance your experience with unparalleled cranking power. The 750 lithium cranking amps in our 12v 75ah Lithium Battery ensure that you have the power you need for reliable engine starts. It’s our way of ensuring that you’re never left stranded, providing you with the power and reliability that you can count on.

75 Amp Lithium Battery75 Amp Lithium Battery – ABS Flame Retardant Plastic Make it Explosion Proof

At Deep Cycle Systems (DCS), we prioritize your safety, which is why our 75 Amp Lithium Battery is constructed with ABS flame retardant plastic, making it explosion proof. We understand that the safety of your equipment and environment is paramount. This design feature ensures that our battery not only meets but exceeds safety standards. When you choose our 75 Amp Lithium Battery, you’re investing in a product that offers peace of mind, assuring you that you’re using a battery that’s as safe as it is powerful.

Safe and Secure Energy Solution for You

With our explosion-proof design, you can confidently integrate our 75 Amp Lithium Battery into your systems, knowing that we’ve taken extra steps to ensure your safety. It’s our commitment to provide you with a secure and reliable energy solution so you can focus on your tasks without worrying about battery safety.

75ah Lifepo4 Battery75ah Lifepo4 Battery – Operating Temperature Range is -30 to +110 degrees C

Our 75ah Lifepo4 Battery at Deep Cycle Systems features an impressive operating temperature range of -30 to +110 degrees Celsius. We understand that your energy needs can vary greatly depending on your environment. That’s why we’ve developed a battery capable of performing in extreme conditions. Whether you’re in a cold, frosty environment or dealing with scorching heat, our battery is designed to maintain its performance and reliability.

Reliable Performance in Any Environment

With this wide operating temperature range, our 75ah Lifepo4 Battery ensures that you have a reliable power source no matter where you are. You can trust our battery to deliver consistent performance, providing you with the power you need in any environmental condition.

DCS 75 Amp Hour Deep Cycle Battery with UN 38.3 Certifications

At Deep Cycle Systems, our 75 Amp Hour Deep Cycle Battery comes with UN 38.3 certifications, underscoring our commitment to quality and global standards. This certification is a testament to the safety and reliability of our battery, ensuring that it meets rigorous international transportation standards. When you choose our UN 38.3 certified battery, you’re choosing a product that meets high standards for transportation safety and quality.

75 Amp Hour Deep Cycle BatteryGlobal Standard Assurance for Your Power Needs

Our UN 38.3 certification provides you with the assurance that our 75 Amp Hour Deep Cycle Battery is recognized globally for its safety and quality. You can be confident that you’re using a battery that is not only powerful and efficient but also meets stringent international safety standards. With DCS, you’re choosing a brand that stands for quality and reliability, ensuring that your power needs are always in good hands.

75 Amp Deep Cycle Battery with IEC 62133 & 62619, CE Certifications

At Deep Cycle Systems (DCS), our 75 Amp Deep Cycle Battery is not only efficient and reliable, but it also comes with IEC 62133 & 62619 and CE certifications. We understand the importance of adhering to international safety and quality standards. These certifications reflect our commitment to providing you with a product that meets stringent global requirements. Whether you’re using it for personal or professional purposes, our 75 Amp battery assures you of top-notch performance and adherence to safety norms.

Global Standards for Your Peace of Mind

With IEC 62133 & 62619 and CE certifications, you can be confident that our 75 Amp Deep Cycle Battery is a product you can trust. We ensure that our batteries meet the highest standards, giving you the peace of mind that comes from using a product that is recognized and respected worldwide for its quality and safety.

Lithium Battery 75ahDCS Lithium Battery 75ah Comes with 4 Years Warranty

We at Deep Cycle Systems are proud to offer a 4-year warranty on our Lithium Battery 75ah. We stand behind the quality and durability of our products, and this warranty is our promise to you of our commitment to reliability and customer satisfaction. When you invest in our 75ah Lithium Battery, you’re not just getting a high-quality product; you’re also getting the assurance of our support for years to come.

Long-Term Assurance for Your Energy Needs

Our 4-year warranty on the 75ah Lithium Battery signifies our confidence in its longevity and performance. We want to ensure that you feel secure in your investment, knowing that we are here to support you with a reliable and enduring energy solution.

Lifepo4 Battery 12v 75ah – 3 Years Under Bonnet Warranty

Our Lifepo4 Battery 12v 75ah at Deep Cycle Systems comes with a special 3-year under-bonnet warranty. We recognize that batteries used in engine compartments face harsh conditions, and our warranty is designed to give you confidence in using our battery even in these demanding environments. This under-bonnet warranty is a testament to the robustness and resilience of our Lifepo4 Battery, ensuring it withstands the rigours of heat and vibration typically found in engine areas.

Specialized Warranty for Demanding Conditions

The 3-year under-bonnet warranty on our Lifepo4 Battery 12v 75ah is our assurance to you of its durability and suitability for challenging conditions. You can trust our battery to perform reliably under the bonnet, giving you the assurance of uninterrupted performance where and when you need it most.

12v 75ah Lithium Ion Battery – Virtual Control to Connect or Disconnect Loads and Battery in Certain Conditions

At Deep Cycle Systems (DCS), our 12v 75ah Lithium Ion Battery is designed with innovative virtual control capabilities. This allows you to connect or disconnect loads and the battery under specific conditions. We understand the importance of having control over your power usage, especially in varying conditions. Our battery’s virtual control feature gives you the flexibility to manage your power more efficiently and effectively. Whether it’s for energy conservation or operational safety, our battery provides you with the control you need.

Smart Power Management for Your Convenience

With our virtual control feature, you can effortlessly manage the power flow to your loads, ensuring optimal efficiency. This smart power management capability is particularly useful in applications where power requirements change frequently. With DCS, you’re getting more than just a battery; you’re getting a sophisticated energy solution that adapts to your needs.

Lifepo4 12v 75ah – Power a Load of 225 Watts to Get 4 Hours Backup Power

Our Lifepo4 12v 75ah battery at Deep Cycle Systems is perfectly suited for powering a load of 225 watts, providing you with 4 hours of backup power. We recognize the need for reliable backup power in various scenarios, from home energy systems to outdoor adventures. Our battery is designed to give you a dependable power source for extended periods. It’s ideal for situations where you need a consistent energy supply, ensuring that your devices and appliances keep running smoothly.

Reliable Backup Power When You Need It Most

With the ability to power a 225-watt load for 4 hours, our Lifepo4 12v 75ah battery offers you the backup power you need in critical situations. Whether you’re dealing with a power outage or need a portable power solution, our battery provides the assurance of continuous power, keeping your essential devices operational.

Deep Cycle Battery 12v 75ah – Get True Deep Discharge with DCS Lithium 75Ah Batteries

At Deep Cycle Systems, our Deep Cycle Battery 12v 75ah is engineered to provide true deep discharge capability. With our DCS Lithium 75Ah batteries, you get a product that can be discharged deeply without compromising its lifespan or performance. We understand the importance of having a deep cycle battery that delivers consistent power, even when drawn down extensively. Our batteries are designed to meet the demands of applications requiring deep discharging, ensuring that you have a reliable and enduring power source.

Maximized Energy Utilization for Your Needs

The true deep discharge capability of our Deep Cycle Battery 12v 75ah means you can fully utilize the battery’s capacity. This is essential for applications where every bit of energy counts. Our DCS Lithium 75Ah batteries ensure that you get the most out of your energy storage, providing you with a powerful and efficient energy solution.

75 Amp Deep Cycle Battery12 Volt 75 Amp Deep Cycle Battery – Voltage Differences between Lithium and Lead-Acid Battery

At Deep Cycle Systems (DCS), we understand the importance of knowing the differences in voltage characteristics between our 12 Volt 75 Amp Deep Cycle Lithium battery and traditional lead-acid batteries. Lithium batteries, including ours, typically offer a more stable voltage range throughout the discharge cycle compared to lead-acid. This means you can expect consistent power delivery without the significant voltage drop that often occurs in lead-acid batteries as they discharge. Our lithium battery maintains a higher voltage for a more extended period, ensuring that your devices and applications run effectively and efficiently.

Consistent Power Delivery for Your Devices

The stable voltage of our 12 Volt 75 Amp Deep Cycle Battery means that you get consistent power delivery, enhancing the performance of your devices. You won’t experience the usual power drop as the battery discharges, which is common with lead-acid batteries. This makes our lithium battery an ideal choice for applications that require a reliable and consistent power supply.

75 Amp Hour Lithium Ion Battery – IP54 for Ingress Protection

Our 75 Amp Hour Lithium Ion Battery at Deep Cycle Systems comes with an IP54 rating for ingress protection. This rating signifies that the battery is protected against dust ingress to a significant degree and splashing water from any direction. We’ve designed this battery to withstand challenging environmental conditions, ensuring that it remains safe and functional no matter where you use it. Whether it’s for outdoor, marine, or industrial applications, our battery is built to endure and perform.

Protected and Durable in Harsh Environments

The IP54 ingress protection of our 75 Amp Hour Lithium Ion Battery provides the assurance that it can withstand harsh environmental conditions. This durability is crucial for ensuring the longevity and reliability of your power source, giving you the confidence to use our battery in a variety of challenging settings.

75ah Deep Cycle Marine Battery – 2500 Lifecycles @100% DOD and More If Maintained Properly

At Deep Cycle Systems, our 75ah Deep Cycle Marine Battery is designed for longevity, offering up to 2500 lifecycles at 100% Depth of Discharge (DOD). This impressive lifecycle count is a testament to the quality and endurance of our battery. Moreover, with proper maintenance, the lifespan of the battery can be extended even further. We understand that in marine applications, reliability and durability are paramount. Our battery is built to provide consistent, long-lasting power, ensuring that you have the energy you need for your marine adventures or applications.

Extended Lifespan for Your Marine Adventures

With the potential for more than 2500 lifecycles at full discharge, our 75ah Deep Cycle Marine Battery is a reliable choice for prolonged use. Proper maintenance can further enhance its lifespan, ensuring that you have a dependable power source for your marine needs over the long term. Trust in our battery to power your marine journeys, knowing it’s built to last.

75ah Marine Battery – Store at 25 Degrees Celsius for Capacity Retention

Our 75ah Marine Battery at Deep Cycle Systems (DCS) is optimally designed for long-term capacity retention, especially when stored at 25 degrees Celsius. We understand that storage conditions can significantly impact a battery’s performance and lifespan. By storing our marine battery at this ideal temperature, you can ensure that it retains its capacity effectively and is ready to deliver optimal performance when you need it. This feature is particularly beneficial for seasonal marine users who may not use their battery continuously throughout the year.

Preserving Your Battery’s Health During Storage

Storing our 75ah Marine Battery at the recommended 25 degrees Celsius helps preserve its health and ensure its readiness for use. This storage guidance is part of our commitment to providing you with a reliable and durable power source, ensuring that your marine adventures are powered efficiently every time.

DCS Lithium Deep Cycle 75ah Battery is Capable to Provide 2C Discharge Rate to Get 150A

At Deep Cycle Systems, our Lithium Deep Cycle 75ah Battery stands out with its capability to provide a 2C discharge rate, delivering up to 150 amps. This high discharge rate capacity allows you to power high-demand applications efficiently, ensuring that your equipment receives the robust power supply it requires. Our battery’s ability to handle such high discharge rates makes it an ideal choice for applications that need a quick and powerful energy burst without compromising the battery’s longevity or performance.

High Power Output for Demanding Applications

The 2C discharge rate of our DCS Lithium Deep Cycle 75ah Battery translates to enhanced performance for demanding applications. Whether you’re using it for high-powered marine equipment, industrial tools, or any application requiring a significant power surge, our battery is engineered to meet those high demands reliably. This feature ensures that you get the power you need exactly when you need it, making our battery a versatile and powerful energy solution.

Contact Us

Deep Cycle Systems has been meeting the energy needs of Australian families for years. The trust of our customers is our pride; many of our new customers are referred by loyal clients. We are a team of experts in providing state-of-the-art energy solutions. Our products are manufactured to provide a longer life span without the need for regular maintenance visits that could dent your budget. Our products require initial installation usually, and you will enjoy the benefits for years. Give us a call at 1300 795 327 or write an email to us at info@deepcyclesystems.com.au.

Battery Bundles

Sale

Redarc Aux Bundle Deal – 12V 75Ah + BCDC1250D

safe

Ultra-Safe

Explosion-proof / No leakage

stable

Stable

Low Internal Resistance / Proven Stability

long

Long Life

Ultra-long cycle life

guarentee

Guaranteed A Grade

Contracted A Grade cell supply


12V 75H Lithium Ion Battery

  • DCS Battery delivers a minimum of 2500  Cycles
  • Ideal replacement for Gel or Lead Acid Batteries
  • High performance compared to Traditional Batteries

Redarc BCDC1250D Battery Charger

  • 50amp output makes it the most powerful in REDARC’s BCDC range
  • Maximises the performance and life of your auxiliary battery

Availability: In Stock (Only RHP is available)

Original price was: $1,998.00.Current price is: $1,649.00.
Battery Terminal Configuration

RHP – Right Hand Positive, LHP – Left Hand Positive

Battery User Guide

Battery Installation Locations

DCS Batteries that are in a sealed traditional style battery case are IP rated 54 unless otherwise specified.

As there is a considerable amount of electronics inside the battery cases, it is important that these batteries are protected from the ingress of particles and water.

IP54 means that there is partial protection against dust & similar particles & protection against splashing water from any direction for a minimum of 10 minutes.
IP54 MEANS THE BATTERIES ARE NOT WATERPROOF

Our DCS Slimline battery range is IP rated to 53 unless otherwise specified.
IP53 means that there is partial protection against dust & similar particles & protection against splashing water up to 60 degrees from the vertical with limited ingress permitted for 3 minutes.
IP53 MEANS THE BATTERIES ARE NOT WATERPROOF.

DCS batteries should be installed and operated in a location that will not exceed the specified operating temperatures.

Make yourself aware of the new requirements that relate to battery storage, IP ratings and venting. Australian / New Zealand Standards (AS/NZS 3001.2:2022)

Do Not

  • Install DCS batteries underneath a vehicle or caravan, or any other external location that is exposed to the atmosphere unless it is fully contained inside a suitable battery housing that will prevent the ingress of particles & or water. Also, sufficient mechanical / structural protection is needed to prevent damage from rocks and debris during recreational vehicle travel.
  • Pressure wash or hose your batteries. You can wipe them down with a damp cloth if needed.
  • Submerge your batteries in any fluids.
  • Install DCS batteries near high heat sources, e.g. exhaust manifolds or turbo chargers.

Operating Temperatures

Each battery has a designated operating temperature range depending on the cell type used.
Our under bonnet Hybrid battery range (using cylindrical cells) is designed to work in ambient temperatures between -30°C to 110°C. Do not operate outside of this temperature range.

Our 12V 180Ah auxiliary batteries have an operating temperature range of -30°C to 60°C. The DCS BMS will not allow these batteries to operate if the 60°C is exceeded.

The DCS BMS will not allow a frozen Battery that is below 0 degrees Celsius to be charged. Charge will only be allowed when the ambient temperature of the battery cell is back above 0°C.
Discontinue the use of a battery immediately if the battery becomes excessively warm whilst in a resting/standby state.

Please check the specifications for the recommended operating temperatures of your particular battery on the DCS website.

www.deepcyclesystems.com.au

Securing your battery

Your battery must be secured to prevent movement. Restraints must prevent any movement under a pulling force of twice the battery weight.

The recommended hold-down bracket torque is 4 N-m. or 3.5 lb-ft.

Care has to be taken to prevent the battery lid seal/gasket from deforming when securing the battery, which could affect the IP rating of the battery.    Do Not over-tighten the battery holding clamps.  

Battery Charging

Use only approved Lithium-Iron Phosphate specific chargers for your battery’s nominal voltage, chemistry and maximum charge rate with the correct charging stage voltages.

All DCS 12V cylindrical cell packs to be charged at:

14.4V  Bulk

13.5V  Float

The DCS 12V 180ah Auxiliary prismatic cell pack (SKU: DCS-12V-180ah) to be charged at:

14.2V Bulk

13.5V Float

Be aware some chargers have fixed charging voltages and cannot be adjusted.

Check the charger specifications for charging voltage levels & charging profiles before purchasing.

Alternator Charging

Our under-bonnet dual battery systems, 80ah Extreme & Slimline range, can be charged directly from the vehicle’s alternator, providing that they are the only battery chemistry being charged.

For example, you cannot parallel a Lithium battery to a lead acid battery and charge from the alternator.

This type of set up has to be separated by using a DC-DC Charger.

If you are parallel connecting batteries together, they have to be the same chemistry, nominal voltage, capacity and age.

Each battery has a maximum charge current listed in the specifications table that should not be exceeded; otherwise, permanent damage could be done to the battery.

When the batteries are parallel connected together, this doubles the amount of current the batteries can be charged at.

For example, our DCS 180ah (2 x 90ah ) dual battery system. The maximum charge current is 80 Amps per battery. So 2 x 80A = 160 Amps. This means you can charge these batteries provided your alternator’s max. output does not exceed 160Amps.

Before choosing a battery, check the maximum output current your alternator can produce and also find out the Cold Cranking Amps (CCA) needed to start your vehicle.

Your factory alternator is generally the best alternator to use, and there is no need for high output aftermarket alternators.

Check the specifications table on the DCS website for the particular battery you are interested in, and look for Lithium Cranking Amps (LCA).

If the LCA meets or exceeds the CCA for your particular vehicle, then the battery is suitable for your vehicle.

Parallel Connected Batteries

Connect Battery 1 Positive to Battery 2 Positive

Connect Battery 1 Negative to Battery 2 Negative ( This cable is extremely important as some vehicles use the chassis as a negative link, which is prone to failing due to corrosion, which causes a high resistance. )

In Balance Wiring

When you have batteries that are wired in parallel, as described above, it is good practice to wire your loads and inputs in balance.

What this means is, for example, to connect loads & inputs positive to the first battery e.g. Battery 1 and the negative loads & inputs to the last parallel connected battery e.g. Battery 2.

This is important when using an inverter that can have a high current draw so that they evenly draw from the parallel connected batteries.

Storage

If you are not going to be using the battery for some time, charge the battery fully to a 100% state of charge using the correct charging profile and voltages.

Disconnect everything off the battery terminals, and it can be left in this state for up to 3 months.

After 3 months, cycle the battery, fully discharge the battery (11.5 volts), then fully charge the battery, and the battery can then be left in this state for another 3 months.

Do Not

  • Use a lead acid charger / maintainer on a Lithium battery.

DCS LFP App

Every DCS LFP battery pack comes standard with detailed battery monitoring information via Bluetooth. (BLE 4.0 Technology)

The app can be downloaded to Android or iOS devices that are Bluetooth enabled.

Comprehensive battery monitoring information for DCS LFP batteries include

  • SOC%. (State Of Charge)
  • Battery pack voltage, Current & Power
  • Time Remaining
  • Individual Cell Voltage Status
  • Battery Management MOSFET temperature
  • Connectivity distance up to 10 metres.

Renaming Your Batteries Using The App 

  • Open the DCS LFP app and connect to the battery.
  • Tap on the three horizontal lines on the top right hand corner of the screen.
  • Input Password. 736263   >  OK
  • Name ………… > OK
  • Refresh the battery list by tapping the circular arrow.
  • Select custom and your battery will now appear in this section.

Modifications

Do not attempt to alter, modify or repair any part of the battery.

Any modifications to the battery will void your warranty.

Fully Discharged Battery

The BMS will emergency open the circuit of the battery terminals to protect the cells. Typically, you will see 3 - 4 volts across the battery terminals when using a multimeter. The BMS needs a 12V supply with at least 1A of current to release and wake up from a cell emergency protection state.

Most mains chargers with a lithium profile will do a slow recovery charge, as will most solar regulators. Some chargers on the market today that are advertised as ‘lithium’ compatible still don’t have the firmware to do a slow recovery charge to release BMSs. If you have a charger that will not wake up the BMS, the easiest way to wake it up is to connect an unregulated solar panel directly to the battery terminals; however, ensure all loads are disconnected before you do this. Having said that, every system should have a suitable low cut-off voltage to shutdown loads/accessories so that the batteries are not fully drained.

“Batteries cannot be left flat/empty; if the low voltage cutoff is triggered, the battery pack should be fully charged as soon as possible. If access to a suitable charger is not possible, disconnect all loads from the battery terminals. The warranty will be void if the battery pack has been left in a low voltage cutoff state for longer than 14 days.”

The most important thing is to isolate everything from the battery terminals, as cables/loads connected to the terminals cause more power drain as the FET gates have to remain closed to cull the accessory standby loads connected to the battery pack + offset BMS standby power consumption.

Incorrect State of Charge Due to a Synchronisation issue:

The state of charge is a calculated value by the BMS and will need to be reset (synchronised) every now and then.

The synchronisation process is automatic and is performed each time the battery is fully charged. The battery monitor (BMS) determines that the battery is fully charged when all 3 "charged" conditions have been met. The "charged" conditions for 12V batteries is:

Charged Voltage (> 14.0 Voltage)

Tail current (4% of battery capacity)

Charge detection time (1 minute)

Electrical Installations Standard  ( AS/NZS 3001 . 2 : 2022 ) For Transportable Structures which includes Recreational Vehicles, Caravans etc.

Please note AS/NZS 3001 is made mandatory by electrical legislation in each state and territory.

The new standard includes requirements for “connectable electrical installation batteries” covering any battery that is installed with the primary purpose of supplying the living / accommodation features of a transportable structure, which includes recreational vehicles and caravans etc.

Below is a brief summary of some of the new requirements.

Lithium - Ion Batteries

  • The location must be appropriate to ensure that the battery operates within the manufacturer’s defined operating temperatures and IP rating.
  • Batteries must be located in a position that prevents any vented gases from entering a habitable area of the recreational vehicle. Any vented gases have to be vented externally from the vehicle. ventilation openings have a minimum vent area requirement, which is calculated based on the ratings of the battery. Any opening into the interior (habitable area) must be provided with an air seal.
  • Any metallic service lines (eg. Gas, Diesel, Water etc.) located near the battery must be at least 300mm. clear of the battery terminals or must be shielded with dielectric material to prevent against short circuits.
  • A battery must be secured to prevent movement. Restraints must prevent any movement under a pulling force of twice the battery weight.

FAQ

Lithium Ferrophosphate (LFP) is a flame retardant, stable, safe and proven cell chemistry that has a very good energy density around 325 Wh/L. This cell chemistry can be engineered for various applications by adjusting the ratio of elements to provide high performance characteristics. E.g. the DCS marine battery range runs 2C cells, which means our little 75Ah battery will discharge comfortably at 75Ah x 2C = 150A. The DCS 80Ah Extreme runs 10C cells which means the 80A can comfortably discharge at 80Ah x 10C = 800A but is of course limited to lower currents due the the Battery Management System.

LFP also has very good cycling durability between 2,000 ~ 12,000 cycles can be achieved depending on how well the cells are managed, and the lowest rate of capacity loss (aka greater calendar-life) compared to other lithium cell chemistries.

Battery cells are simply a bunch of resistors with the ability to store energy. A 100Ah battery pack has a different resistance characteristic compared to a 50Ah battery pack, that theoretical difference in resistance is 2:1. So if you connect a 100Ah battery in parallel to a 50Ah battery there is no way for these two batteries to equalise and therefore you can’t charge them correctly. So for example connecting a 60Ah calcium starting battery to a 120Ah AGM via a VSR (Voltage Sensing Relay) you cannot charge both batteries correctly and from that day onwards you are prematurely destroying both battery packs. Same theory applies with lithium’s it’s still a battery pack.

What’s the solution? A DC-DC charger, you now have a permanent point of isolation (meaning that both batteries are never connected to each other in parallel). The DC-DC charger takes the surplus power from battery A (engine) and chargers battery B (aux/house). This device now allows any battery capacity and or chemistry to be used.

Yes you can, but lithium’s have a different voltage curve, so you would still need to use a programmable VSR to dial them in correctly. You would also need to ensure the batteries are programmed to never exceed a 10%SOC variance, any larger and you risk damaging the BMS's. These devices also draw a lot of power when engaged to so it’s best to run the two batteries in permanent parallel and run a load disconnect instead of a VSR.

Lithium battery cells have a super low resistance so are very easy to charge and very efficient. This level of efficiency means you can charge them at very high C rates. For example if you look at the charge rate of a 100Ah AGM battery the recommended charging current will be around 25A, which is a 0.25C charge rate. If you consider the DCS 12V 100Ah Lithium battery it can be charged at up to 70A which is a 0.70C charge rate. This means you no longer need to consider DC-DC chargers as you can connect our batteries directly to high power charging devices such as suitable alternators, or large buck boosters. For example our popular dual 90Ah battery system for boats and 4WD vehicles, can be connected to alternators up to 160A.

Because our batteries are internally voltage regulated and because our BMS has such a high sustainable peak discharge current they will do an amazing job of equalising very quickly.

The BMS will emergency open circuit the battery terminals to protect the cells. This means there is no longer any resistance in the system. The BMS needs a 12V supply with at least 1A of current to release and wakeup from a cell emergency protection state.

Most mains chargers with a lithium profile will do a slow recovery charge as will most solar regulators. Some chargers on the market today that are advertised as ‘lithium’ compatible still don’t have the firmware to do a slow recovery charge to release BMS’s. If you have a charger that will not wakeup the BMS, easiest way to wake it up is to connect a unregulated solar panel directly to the battery terminals, ensure all loads are disconnected before you do this. Having said that every system should have a suitable low cut off voltage to shutdown loads/accessories so that the batteries are not fully drained.

"Batteries cannot be left flat/empty, if the low voltage cutoff is triggered the battery pack should be fully charged as soon as possible. If access to a suitable charger is not possible, disconnect all loads from the battery terminals. The warranty will be void if the battery pack has been left in a low voltage cutoff state for longer than 14 days."

Most important thing is to isolate everything from the battery terminals, as cables/loads connected to the terminals causes more power drain as the FET gates have to remain closed to cull the accessory standby loads connected to the battery pack + offset BMS standby power consumption.

Use the following settings:

Charged voltage 14.0V
Tail current 4%
Charged detection time 1min
Peukert 1.05
Charge efficiency 98%
Current threshold 0.1A
C rates: refer to the battery pack capacity

Fully charge to 100% isolate everything from the terminals and leave for max 3 months and then cycle (fully discharge and fully charge) and leave again for 3 months etc…. Minimum 4 cycles per year to not effect the cells capacity.

The reason many factory batteries fall over after 9/12 months is because modern/smart alternators typically drop the alternators voltage output to 13.5/13.6V. This voltage is not high enough to charge wet/calcium/lead acid batteries so from the getgo they are destined to fail prematurely. They are typically under charged to around ~80%SOC at these voltages.

So what happens when DCS Hybrid batteries are connected to smart alternators? Exactly the same thing they get charged to around the same 80%SOC. However because LFP has no memory effect that's perfectly fine. By only charging to 80% you are further improving the service life of our batteries. It's no not necessary to charge our batteries over 80%SOC. The only advantage is that you give the BMS a chance to detect full charge voltage and calibrate the SOC readout. So try to plug into mains once a week to fully charge your batteries, especially if your not running any fixed solar supply.

All DCS 12V cylindrical cell packs can be charged as follows:

Bulk: 14.4V
Float: 13.5V

The DCS 12V 180Ah Auxiliary prismatic cell packs (SKU: DCS-12V-180Ah) need to be charged as follows:

Bulk: 14.2V
Float: 13.5V

When the battery pack is discharged down to 11.50V the BMS resets to 0%SOC and now is placed in a relearning state - the pack must be fully charged continuously without stopping to calibrate again. Charge it on a mains charger to 14.60V.

Depending on the usage pattern, best to fully cycle the batteries once every 3 months to give the cells a refresh. To fully cycle a 12V pack discharge to 11.50V and charge to 14.60V.

BMS & CMS

Here at DCS, designing lithium batteries is not only our bread and butter, but we love this safe, stable, robust, and high-performance cell chemistry so much that we decided to develop our own range of Battery and Cell Management Systems in 2015.

DCS Battery Management System:

What was the objective? Well, the reason we embarked on this project was that all the basic Chinese designed BMS’s are just protection boards, and it is hard to call them a BMS when they don’t do any cell balancing or provide any means of programmability for various parameters and cell control. A lot of Battery Management Systems that we have tested were using inferior PCB engineering design techniques and poor components. That means continuous performance above 100A was more or less impossible, and reliability was also questionable when pushing above 100A with those Battery Management Systems.

Our key BMS objective was to develop a high-performance 200A BMS that could do;

  • 200A continuous operations using high-quality components
  • To have a minimal increase in temperature at peak output current (as these circuit boards are installed inside battery packs, limiting internal heat build-up that is crucial for the longevity of the battery cells).
  • Designed for engine cranking applications, it has to deliver a minimum of 1200LCA’s for 10 seconds (because of the limited voltage drop with suitable lithium cells, it’s very easy to crank over modern engines. Most engines will start in under 1sec, so 10 seconds is plenty). CCA’s don’t apply to lithium batteries as this standard was developed for lead-acid batteries and needed to deliver 30 secs of cranking amps. When a lithium battery is controlled via a BMS, the correct terminology is LCA = Lithium Cranking Amps based on delivering 10 secs of cranking amps.
  • Suitable for high temperatures applications, e.g. engine compartments. It will be stable up to 180 degrees C.
  • Bluetooth and WiFi connectivity in order to develop a comprehensive app platform
  • Pass MIL vibration testing standards (to open up the development of batteries for just about any application).

In a nutshell, the design needed to be tough and reliable for those who use them in the field with no room for error. The construction materials, coating and surfaces, assembly techniques are critical in designing a reliable system. After submitting our brief to all major leading manufacturers in Europe, Japan, USA and Korea, we assessed their expertise and ended up working with a leading and well known Japanese semiconductor manufacturer.

This is a typical Chinese 100A 4S BMS design

This is the DCS 4S 200A BMS

After three years of development, in early 2018, we were satisfied with the circuit board stress testing and released the first batch of our newly developed BMS’s right across our entire 4S (12V) & 16S (48V) battery range. At the same time, we hired an app development team to start working on the software integration to launch our first app platform. The first GEN1 BLE DCS BMS’s that featured Bluetooth chips were launched in OCT 2019. The app platform required a lot of tweaking both on the hardware and software front, and our GEN2 BMS’s were released in mid-2020 along with a more stable app platform with a new design scheme. Our latest GEN3 BLE BMS’s had been released in JAN 2021. The accuracy and stability of the DCS LFP App monitoring system is now very mature and refined. Some additional features had been added along with the ability to create custom battery names. We can produce our DCS BMS technology in any continuous rating range from 10A to 200A with our comprehensive BLE DCS LFP App platform.

DCS Cell Management System:

Having developed such an industry-leading and reliable BMS, it made no sense to combine the cell balancing system together with the BMS. So with our many years of experience in designing and maintaining lithium batteries, we have developed a stand-alone CMS to compliment our BMS. CMS? What? OK, so there are two ‘theories’ of cell balancing in the lithium world passive and active. Passive balancing is a cheap inferior method of cell management as it can burn resistors in an attempt to bleed cell strings. In contrast, active cell balancing is a more complex and efficient balancing technique that redistributes charge between battery cells during the charge and discharge cycles.

Passive balancing has two fundamental setbacks;

  1. Heat: We don’t want unnecessary heat build-up inside a battery pack. The less internal heat, the lesser the impact on the battery cells over time
  2. Resistors have a limited service life, and once they fail game over, you have no cell management. But more importantly, they can fail in such a way in which they will keep drawing power and eventually destroy the cells.

Active balancing is the only way to manage lithium cells correctly. There are many ways to design an integrated circuit (IC) to actively manage cell strings. At DCS, we have tested well over 10 different methods of active balancing IC’s over the years and, in the end, again decided to develop our own active management circuit boards with the best-combined techniques based on our stress testing. Our in house PCB design engineer Max, designed our circuit boards to again meet the following criteria:

  • High current movement (our latest boards now achieve 3.7A dynamic movement per channel)
  • Thermal management to ensure the boards remain reliable in harsh environments
  • Be able to withstand maximum current and thermal loads to ensure long term reliability
  • Fail-safe design, if any component fails, it won’t compromise the battery pack (not consume power from the battery cells)

This is the DCS 16 channel CMS

There are, of course, some other software features and parameters, which we can’t disclose on this page to the public, as well as some very fancy hardware. But what our latest 04 channel and 16 channel CMS’s do is they can easily manage up to 1000Ah battery banks. So, for example, if you wanted to use our 16 channel CMS’s you could run a 51.2V 1000Ah single battery pack, which would be 51.2kWh in size! The DCS 15kWh batteries are just shy of 300Ah in capacity, so one can only imagine the tight CMS control these batteries are under, and that’s why we back them with a 10 year / 80% capacity warranty.

The DCS 16 channel 59.2A active cell balancing system is so powerful that it will change the battery storage market forever. With this system, the lithium market will continue to dominate for the foreseeable future. Of course, all DCS batteries now feature both our BMS & CMS circuit boards.

We design all our own PCB hardware and the circuit boards are tested to withstand a minimum of 10 years of severe abuse. This video is the MIL-STD 810G Method 514.6 which includes 4 procedures for different modes of vibration.

How to wire batteries correctly

CELL SAFETY INFO - Why LiFePO4 (LFP)?

Lithium Ferrophosphate (LFP) is a flame retardant, stable, safe and proven cell chemistry that has a very good energy density around 325 Wh/L. This cell chemistry can be engineered for various applications by adjusting the ratio of elements to provide high performance characteristics. E.g. the DCS marine battery range runs 2C cells, which means our little 75Ah battery will discharge comfortably at 75Ah x 2C = 150A. The DCS 80Ah Extreme runs 10C cells which means the 80A can comfortably discharge at 80Ah x 10C = 800A but is of course limited to lower currents due the the Battery Management System.

LFP also has very good cycling durability between 2,000 ~ 12,000 cycles can be achieved depending on how well the cells are managed, and the lowest rate of capacity loss (aka greater calendar-life) compared to other lithium cell chemistries.

WHY YOU CANNOT USE A VSR BETWEEN TWO DIFFERENT BATTERIES CAPACITIES & CHEMISTRIES?

Battery cells are simply a bunch of resistors with the ability to store energy. A 100Ah battery pack has a different resistance characteristic compared to a 50Ah battery pack, that theoretical difference in resistance is 2:1. So if you connect a 100Ah battery in parallel to a 50Ah battery there is no way for these two batteries to equalise and therefore you can’t charge them correctly. So for example connecting a 60Ah calcium starting battery to a 120Ah AGM via a VSR (Voltage Sensing Relay) you cannot charge both batteries correctly and from that day onwards you are prematurely destroying both battery packs. Same theory applies with lithium’s it’s still a battery pack.

What’s the solution? A DC-DC charger, you now have a permanent point of isolation (meaning that both batteries are never connected to each other in parallel). The DC-DC charger takes the surplus power from battery A (engine) and chargers battery B (aux/house). This device now allows any battery capacity and or chemistry to be used.

What if both batteries are the same, can I run a VSR between exactly the same two batteries?

Yes you can, but lithium’s have a different voltage curve, so you would still need to use a programmable VSR to dial them in correctly. However these devices draw a lot of power when engaged to so it’s best to run the two batteries in parallel and run a load disconnect instead of a VSR.

The advantages of the lithium battery cell chemistry

Lithium battery cells have a super low resistance so are very easy to charge and very efficient. This level of efficiency means you can charge them at very high C rates. For example if you look at the charge rate of a 100Ah AGM battery the recommended charging current will be around 25A, which is a 0.25C charge rate. If you consider the DCS 12V 100Ah Lithium battery it can be charged at up to 70A which is a 0.70C charge rate. This means you no longer need to consider DC-DC chargers as you can connect our batteries directly to high power charging devices such as suitable alternators, or large buck boosters. For example our popular dual 90Ah battery system for boats and 4WD vehicles, can be connected to alternators up to 160A.

WHY CAN DCS BATTERIES BE CONNECTED IN PARALLEL WITHOUT ANY EXTERNAL COMMUNICATION SYSTEM?

Because our batteries are internally voltage regulated and because our BMS has such a high sustainable peak discharge current they will do an amazing job of equalising very quickly.

WHAT HAPPENS IF I FULLY DISCHARGE MY BATTERY TO EMPTY?

The BMS will open circuit the battery terminals to protect the cells. This means there is no longer any resistance in the system. The BMS needs a 12V signal with at least 1A of current to release and wakeup from a cell protection state. Most mains chargers with a lithium profile will do a slow recovery charge as will most solar regulators. Some chargers in the market today that are advertised as ‘lithium’ compatible still don’t have the firmware to do a slow recovery charge to release BMS’s. If you have a charger that will not wakeup the BMS, easiest way to wake it up is to connect a unregulated solar panel directly to the battery terminals, ensure all loads are disconnected before you do this. Having said that every system should have a suitable low cut off voltage to shutdown loads/accessories so that the batteries are not fully drained.

BATTERY MONITOR SETTINGS

Use the following settings:

Charged voltage 14.0V
Tail current 4%
Charged detection time 1min
Peukert 1.05
Charge efficiency 98%
Current threshold 0.1A
C rates: refer to the battery pack capacity

What is the best state/charge to store these batteries ?

Fully charge to 100% isolate everything from the terminals and leave for max 3 months and then cycle (fully discharge and fully charge) and leave again for 3 months etc…. Minimum 4 cycles per year to not effect the cells capacity.