From the outside there may not appear to be a lot of difference other than size and shape, when it comes to Lithium Ion home energy storage batteries. Some are crazy big, some are unbelievable small, some are wall mounted, some are free standing, some are square and some are rectangular. Whilst these factors are important in choosing your battery, what really matters is what’s on the inside.
For DCS PV Series batteries we have chosen a chemistry known as Lithium Iron Phosphate (LiFePO4) or simply LFP. The reason is simple. This chemistry is more suited for deep cycle applications, being not only the safest but also longer lasting.
DCS LFP battery cells have a life cycle of around 2,500 cycles before they will reach 80% of their original capacity and will continue to maintain integrity well beyond 5,000 cycles making this the superior technology for deep cycle applications. LFP also has a high tolerance compared to other chemistries when it comes to thermal stability and temperature changes.
So what other options are there? Some of our competitors have chosen to use Lithium Nickel Manganese Cobalt Oxide (LiNiMnCOO2), or its common name of NMC. This chemistry is most often used in applications such as power tools and electric vehicle (EV) batteries and other such devices that require a high specific energy discharge – which very quickly degrades the lifespan of the cell. Whilst this chemistry is great for these high-powered, short use items it does not perform as well for deep cycle applications. NMC cells have a cycle life of between 800 to 1000 cycles before they reach 80% original capacity which simply does not compare to that of LFP cells.
Next is the safety factor. Whilst LFP cells easily pass all safety tests and standards including the IEC 62133 being the most important standard for lithium ion batteries with flying colours the same could not be said for NMC/NCA battery cells that only just pass this standard.
What about the cost? The cost of producing NMC cells compared to that of LFP is almost half the price today due largely to the large scale mass production of NMC cells for EV batteries. But given that LFP cells will last at least 200% longer than that of NMC cells, in the end LFP cells end up being the far better investment choice for consumers in terms of cost, reliability, performance and safety.
An easy way to visualize this is by imagining the old ‘Tortoise and Hare’ comparison. Only in this instance the tortoise is super charged so not only can it keep up with the hare but it also has the stamina and endurance to well outlast it.
So its reassuring to know that when you purchase a DCS PV series battery for your home energy storage needs you are also purchasing the best possible chemistry and technology available today combined with superior advantages in safety and endurance and of course backed by the best after sales support and warranty conditions in the business.