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Storage Batteries: the fuel tank of your solar power system
Without batteries to store energy, you would only have power when the sun was shining or the generator was running. In most cases, lithium-ion batteries are the best option for a solar panel system, though other battery types can be more affordable. Solar batteries work by storing energy produced by your solar panels and storing it as for later use. ... When you install a solar battery as part of your solar panel system, you are able to store excess solar electricity at your home instead of sending it back to the grid. A rechargeable battery, storage battery, or secondary cell, (or archaically accumulator) is a type of electrical battery that can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary battery, which is supplied fully charged and discarded after use.