SKU: DCS-12V-200Ah-SL
DCS 12V 200Ah Slim Line (Lithium)

FREE DELIVERY AUSTRALIA WIDE

12V 200AH Lithium Ion Battery | Deep Cycle | Engine Starting

DCS Batteries are the ideal drop-in 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 5 year return to base warranty.

Availability: In Stock

$2,349.00 AUD

From $118.41 a fortnight withInfo

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The 200Ah slim lines feature a pair of terminals on each side (POS & NEG) that are internally bridged with copper busbars – this allows more surface area for more connections and the ability to run two cables one off each pair of terminals for large inverters and also comes in handy when expanding multiple batteries in parallel.

All DCS batteries now feature our comprehensive Bluetooth System available on both Android and Apple operating systems that shows a lot of cool things. These slimline DCS batteries are ideal for utes, dual cabs and for squeezing in between drawers and in campers. Why not run your entire vehicle from one of these? They provide 1200 LCA’s, so they will start even the largest of diesel engines. It is an amazing battery technology that can do it all.

  • 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.
Specifications:
Nominal Voltage 12.8V
Nominal Capacity (1Hr) 200Ah
Case Dimensions (L x W x H) 512mm x 125mm x 325mm
Weight 30.40 Kgs
Cycling voltage 11.5 ~ 14.6V
Charge voltage 14.0 ~ 14.6V
Float Voltage 13.5 ~ 13.7V
Maximum Charge Current 200A
Recommended Charge Current ≤140A
Maximum Discharge Current ≤250A
BMS (built in) Automatic cell balancing, over discharge/charge
Cell Chemistry DCS 3.2V 5.0 – 7.2Ah Cylindrical (LifePO4)
Cycle Performance 2500 Cycles @ 100% DOD
LCA 1200
Ingress Protection IP54
Case Metal with white pearlescent finish
Operating temp Range -30 to +80 degrees C
Terminals Top Mount M8 Stainless steel / Copper
Parallel Connections YES
Warranty 5 years

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

Optionals

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GET A DEEP CYCLE 12V 200AH SLIMLINE LITHIUM BATTERY TO INCREASE POWER EFFICIENCY

12v 200ah lithium battery

Technologically advanced electric appliances result in resource efficiency as every new generation overcomes the issues of preceding versions. Your previous electric appliances may be efficient enough; however, the advanced versions are eco-efficient, which means efficiency and compliance standards for environmental safety. To lower the greenhouse gases, you may run the generator on gasoline instead of diesel for electricity production; however, the solar system is efficient and eco-friendly at the same time. There is no need to pay for diesel or gas as sunlight is a free alternator. The solar arrays power up appliances during the daytime, while the 12v 200ah lithium battery units provide backup power during non-solar production hours.

Solar System for Self-Sufficiency

Sunlight is a gift by nature that we can easily use to power the electricity demand of the entire earth population. The estimated solar capacity of the earth is somewhere between 1500 to 50000 exajoules which is higher than the total world energy consumption of 560 exajoules by 2012. It means sunlight can easily power the entire planet earth if utilized intelligently. We can supply solar electricity to areas that aren’t favourable for solar production through the energy distribution system.

The drastic change will be no carbon emission, reduced electricity cost, and improved environmental conditions. The broad scope of solar energy covers domestic use, agriculture and horticulture applications, solar-powered transportation, and industrial consumption. The military camps and bases worldwide are also shifting over solar technology at large.

A well-designed on-grid solar system can lower peak demand during expensive hours set by local grid management, even during evening time, via battery power. You can have zero electricity expense by exporting extra produced electricity to the grid via net metering and harmful bills. During the winter season, these negative bills will support you to lower the electricity cost to absolute.

BATTERY STORAGE TYPES

Power batteries are the backbone for a solar system as you can increase efficiency by having a suitable capacity battery unit to match your power requirements. The battery types for solar systems are:

LEAD-ACID BATTERY

The lead-acid battery is the oldest version serving for over 150 years. It is best known for its low prices among the public. The downside includes heavyweight, outdated technology, low energy density, high memory effect, shorter lifespan, and low discharge rate. Though the new technologies are feature-rich and more efficient, the flooded acid batteries are high in the sale, but you couldn’t expect much from them.

lithium battery 12v 200ahAGM Battery

AGM or Absorbed Glass Mat battery banks are sealed acid battery units, also known as gel batteries, updated versions of a lead-acid battery. AGM battery has a limited amount of electrolyte absorbed within a plate separator. These batteries require less maintenance and are recharged five times earlier than a lead-acid battery.

Lithium Battery 12v 200ah

The lithium battery 12v 200ah is the technologically most advanced and feature-rich battery bank full of options. It works as a battery storage container for the solar system so that you can draw power when required. People often think that lithium-ion is more expensive than an AGM battery, which isn’t true. An AGM battery has a maximum of half of the discharge rate, which means you would require a double amount of ampere-hours to meet your power requirements. Further, the AGM batteries are heavier and need more connectors, accessories, and space. Lithium-ion batteries are lightweight due to their high energy density.

200ah lithium battery200ah Lithium Battery is the Perfect Power Backup Solution

Solar energy is an efficient, cleaner and greener form of energy for sustainability and environmental impacts. In these times of planet earth being polluted due to inefficient energy use, solar energy is the long-term answer for efficient energy usage. 200ah lithium battery is the perfect candidate when installing solar systems. They provide clean, green and efficient energy by supplying maximum power at all times according to their capacity.

Deep Cycle Systems is a leader in solar energy powered batteries and systems. Our solar batteries can work efficiently in a wide usage range regardless of environmental conditions. The Deep Cycle Systems battery pack works perfectly everywhere, whether on-grid or off-grid usage. Our solar purpose-built lithium batteries can provide you with constant high power without any voltage drop. In addition, our lithium powered solar batteries are suitable for solar charging. Hence, when you buy our lithium powered solar storm, it packs adequate energy to power your appliances or devices.

WHY SOLAR 200AH DEEP CYCLE BATTERY IS A GOOD IDEA?

Following are characteristics of lithium solar battery

PREVENTING OVERCHARGE

Lithium batteries can charge very fast as compared to lead-acid batteries. When connected to a proper lithium charger, a good lithium battery prevents the battery from over-charging. Thus the charge is maintained without the risk of overcharging the battery.

200ah deep cycle battery

ANALYZE COST OF CHARGER/BATTERY

You want the best deal for your lithium powered solar battery. Therefore choose your option wisely as DCS lithium chargers are the affordable and highest quality for your solar powering lithium battery needs.

FREE CHARGING

Solar 200ah deep cycle battery is essentially providing you with free power. Since the batteries are being charged via solar panels, a one-time investment saves you from expensive electrical bills while committing to cleaner and greener energy. The power source for charging your battery is solar (via solar panels). It means that you are getting power for essentially free once you have a solar system set up at your property. Lithium batteries do not possess any charging memory. Therefore you can use them without having to charge fully.

100% EFFICIENT

Lithium Phosphate batteries have a 100% capacity available. Coupled with their fast charging and discharge rates, they can be an excellent fit for all applications. The quick charging ability delivers power bursts power in a short amount of time.

Deep Cycle Systems

WHY IS DEEP CYCLE SYSTEMS SUITABLE FOR SOLAR LITHIUM POWERED SYSTEMS?

Deep Cycle Systems offers premium solar systems solutions and a wide range of products. We at DCS specialize in lithium-ion batteries, lithium chargers, chargers etc. Deep Cycle Systems is a one-stop solution provider for power-related electrical supplies. When buying at DCS, we ensure to deliver our valuable customers a premium, trouble and hassle-free solution.

Deep Cycle Systems product line is top-notch. Over the years, we have provided our customers with durable, long-lasting products. Deep Cycle System takes pride in developing each product after research and development for years. Providing robust, strong power solutions, Deep Cycle Systems is one of the best options to shop for your needs. Pricing of products is another factor in the consumer mind. Everyone naturally wants the most value for their money. Deep Cycle Systems offers reasonable pricing for top of the line power solution products.

200ah slim lithium battery

ONE OF THE LARGEST DEEP CYCLE BATTERIES FOR A BIG SOLAR SYSTEM

Deep cycle batteries have been around for several years now. However, with each year passing by, the technological advancement in deep cycle batteries is widely noticeable. A 200ah slim lithium battery can power an extensive solar system installed at the house of an office which requires an additional amount of energy compared to traditional homes. Due to their advancements in technology, deep cycle batteries can provide more power for bigger houses and offices with larger loads.

Deep Cycle Systems is a leading manufacturer for supplying top-notch deep cycle batteries. Our batteries are built to deliver the highest industrial standards. Deep Cycle Systems is one of the best deep cycle battery providers. Our batteries provide reliable and durable service life. Deep Cycle Systems offers deep cycle batteries with extended service life and increased performance. Deep Cycle Systems has been producing deep cycle batteries for years. Henceforth, our ample experience combined with years’ worth of research and development enables us to create high-quality deep cycle batteries. Deep Cycle Systems is one of the best deep cycle battery providers in the market.

IS A 200AH SLIM LITHIUM BATTERY GOOD?

The answer is yes! Deep cycle batteries have many advantages and benefits over traditional lead-acid or advanced lithium batteries. Following are some of the advantages deep cycle battery offers.

INCREASED ENERGY BACKUP

Deep cycle batteries of the same size offer more in terms of power backup as compared to a standard deep cycle battery. Henceforth, the same sized deep cycle battery can provide more extended energy backup than the traditional lead-acid battery.

STEADY ENERGY SUPPLY

Deep cycle batteries have a constant supply of voltage at all times. This means that there is no change in the amount of voltage if the deep cycle battery is running low on charge. Henceforth, this steady voltage supply enables the energy system to work more efficiently and trustworthy.

EASILY TRANSPORTABLE

Deep cycle batteries are packed. The majority of the deep cycle batteries used are sealed batteries. This functionality enables the deep cycle batteries to be easily carried and transported. Therefore, deep cycle batteries are widely used in RV’s and off-road vehicles because of their increased ability to transport.

NO MAINTENANCE

Deep cycle batteries, especially dry ones, are easier to maintain. Deep cycle batteries, therefore, do not require any active maintenance. In comparison, lead-acid batteries require frequent maintenance of at least monthly acid-water level check-ups. Deep cycle batteries, therefore, are maintenance-free.

Overall, deep cycle batteries are a safer and wise investment when it comes to energy storage solutions. Due to their factor of producing renewable energy production, these batteries are clean and green for the environment. Henceforth, deep cycle batteries are environmentally friendly.

largest deep cycle battery

WHY DEEP CYCLE SYSTEMS FOR RELIABLE ENERGY SOLUTIONS?

Deep Cycle Systems is a market leader for manufacturing high-quality energy solutions. Our energy solution products are built to withstand harsh weather conditions along with increased rigidity. Deep Cycle Systems is one of the best energy solution providers. We have been in the business of providing reliable and largest deep cycle battery for years.

Our years’ worth of field experience combined with extended development and research enables us to be one of the best energy solution providers. Deep Cycle Systems offers affordable energy solutions and expert installation services at your doorstep. Therefore, once you shop for energy solutions from us, we deliver peace of mind.

slim line lithium battery

SLIMLINE LITHIUM BATTERY WILL NEVER LEAVE YOU STRANDED ON ROAD-SIDE

Lithium-ion batteries can be used as car batteries to power up headlights gauges and, in some cases, power the heater when the car is idling. The slimline lithium battery is highly reliable as they require no maintenance. Lead-acid batteries are notorious for running low when a vehicle is parked for days and weeks, eventually leading to weaker battery cells. However, lithium-ion batteries pose a low discharge rate; hence, the battery level is maintained even when not in use. So, a lithium-ion battery is a suitable perfect solution if you don’t want to jump-start your vehicle after parking it for weeks.

Deep Cycle Systems is a leading battery provider with an extensive range of lithium-ion batteries for cars. Our lithium-ion batteries have been produced under extensive research and development over the years. At Deep Cycle System, we develop durable, long-lasting, reliable batteries that provide years of service for your private and commercial vehicles. Deep Cycle System will never lead you to push-start your car in the early morning to work even in the coldest and harshest temperature.

Slimline lithium battery

WHY SLIMLINE LITHIUM BATTERY IN YOUR VEHICLE?

The most common problem with lead-acid batteries is running out of charge, stranding you. Such traditional batteries require regular maintenance, still running weak, especially in hot weather. On the other hand, a lithium-ion battery is pretty much connected and plays as it maintains its charge, preventing charging cells from going weak. In addition, you get rid of checking the acid level in your car every few days. Lithium-ion battery works for long years, whereas a typical lead-acid battery will only last two years.

Lead Acid batteries are reliable, maintenance-free, long-lasting and rigid. The initial cost of a lithium-ion battery may seem higher initially; however, lithium-ion batteries prove their worth as it works efficiently with time.

Slimline lithium battery supplies a constant voltage to the device it is powering, in this case, your car. A lithium-ion battery provides hassle-free power to your vehicle without fluctuations in power delivery. Lithium-ion batteries are standard in automotive sectors ranging from compact sizes used in cars and motorcycles to RV for camping and other special off-grid vehicles.

DEEP CYCLE SYSTEM SPECIALIZED LITHIUM-ION BATTERY

Deep Cycle System is a top-notch power solution provider. We at Deep Cycle System offer various products ranging from batteries to solar systems, solar chargers, solar controllers, etc. Pricing is a critical factor in any purchase decision. Deep Cycle System offers reasonable pricing on excellent products. Our products are affordable along with maximum durability. Deep Cycle System delivers long-lasting power solutions for your off-grid and on-grid usage.

Deep Cycle system is equipped with a highly skilled team of installers. The product installation and guidance is more straightforward and seamless. In addition, Deep Cycle Systems has excellent sales services for our valuable customers as we are committed to providing the best product and after-sales services to our clients. Shop with us for a premium experience for your power solutions.

Call Us Today

Deep Cycle System is the leading manufacturer of deep-cycle lithium batteries. We have high-precision solar products that are manufactured with perfection. Our quality products have the public’s confidence due to their reliable performance. Deep Cycle Systems is just one call away for energy solutions guidance. You can call us on 1300 795 327. In addition, you can also email us at info@deepcyclesystems.com.au

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. 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.

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 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 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.

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 connect to smart alternators? Exactly the same thing thry 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.

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

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.