Solar panels made from CDs are simply not a thing. Sure, they might look cool as a weekend project, but forget about generating any real electricity from them.
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PV modules and solar lights both store energy in a battery for later use. However, this is a positive thing because it ensures that the light will be charged the next time you turn it on.
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Although energy storage does not produce energy—in fact, it is a net consumer due to efficiency losses—it does potentially allow greater use of variable renewables by shifting energy from periods of low demand to periods of high demand, which reduces curtailment and eases.
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Estimate how many batteries you need based on your daily kWh usage, system voltage, DoD, and battery specs.
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