Solar enery batteries are able to store extra solar energy from the middle of the day so you can use it at a different time. They are usually available in two main types, solar gel battery and lithium battery.
Hommiiee deep cycle gel batteries have higher DoD ratings which allow you to use more of the energy stored in your solar battery before you have to recharge it. It also has higher round trip efficiency that will end up saving you more money.
Hommiiee lithium-ion batteries have a higher DoD, up to 90%, which means they have a longer lifespan, usually with a minimum of 10 years. With a neat design, they take up much less space.