When shopping for batteries for your solar power system, it’s not quite as simple going to a store and buying some. There are actually two completely different kinds of batteries that solar systems can make use of both of which will change the way you use your solar system.
Lead acid solar batteries have been used in energy systems for decades. They are the more affordable solar battery option. Lead acid batteries can be a viable option for property owners who want a solar power solution but only have a few appliances they wish to power.
Lead acid batteries require ventilation and regular maintenance to operate correctly, which increases the chances of the battery leaking. This also limits how lead acid batteries can be installed, because they can’t be placed on their side. They also have a low depth of discharge (DoD), so they need to be charged more often. Having a low depth of discharge also means they have a shorter lifespan – between 2 and 5 years depending on usage.
Lithium-Ion batteries are lighter and more compact, allowing for easier storage. Lithium-ion batteries require almost no regular maintenance. They also have a higher battery energy density, meaning they can hold more energy in a smaller space than a lead acid battery. Lithium-Ion batteries have a higher depth of discharge, so you can use more of the energy stored within the battery before it must be recharged. They have a longer lifespan, as well – most have a guaranteed warranty of a minimum of 10 years.
Lithium-ion solar batteries are more expensive than their lead acid counterparts.
Personally, our recommendation is Lithium-ion batteries as their longevity and reliability will be of greater long term value to your solar power system.
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