Lead-carbon batteries are similar to lead-acid batteries in that they are low-cost and their components are readily recyclable. But lead-carbon batteries manage to overcome many of the disadvantages usually associated with lead acid.
Firstly, they can be discharged more deeply and frequently without damaging the battery’s ability to hold a charge, meaning that their useful life is much longer. Whereas a conventional lead-acid battery may be deemed to have reached the end of its life after about 1,000 cycles to at 50% depth of discharge (DoD), lead carbon batteries can operate for 4,000+ cycles at 70% DoD. Over the course of a battery’s lifetime, this translates into roughly 4 to 6 times greater energy yield over conventional wet lead acid – at a comparable price.
DoD vs cycle number curve for Maxpower FCP lead carbon batteries. At 70% depth of discharge, the battery will have a cycle life of about 4,000 cycles.