Solar batteries typically are made with one of three chemical compositions: lead acid,saltwater, lithium ion. In most cases, the best option for a solar panel system are lithium ion batteries. However, other battery types are more affordable.
Lead acid solar batteries
Lead acid batteries have been used for energy storage for decades. While compared to other battery types, they have a relatively short life and lower DoD and a larger size. However,they are the least expensive one.
Saltwater solar batteries
the saltwater battery is a newcomer in the home energy storage. Unlike other solar batteries, saltwater batteries relying instead on saltwater electrolytes, and don’t contain heavy metals. While batteries that use heavy metals, batteries need to be disposed of with special processes, a saltwater battery is easily recycled. However, As a new technology, saltwater batteries are relatively untested. And Aquion, a company that produce solar batteries for home use, filed for bankruptcy in 2017.
Lithium ion solar batteries
Lithium-ion batteries are a new type of deep-cycle battery technology. They also have a higher DoD and longer lifespan when compared to lead acid batteries. And also they are lighter and more compact than lead acid batteries. However, the price of lithium ion batteries are much higher than counterparts.