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originally posted by: SolAquarius
a reply to: Box of Rain
Yes your right the battery does not produce energy but merely stores energy.
It doesn't make a difference for electricity produced from burning fossil fuels, generating hydropower, or nuclear.
All the above can produce energy on demand for peak needs. The coal plant simply burns more coal as needed. The hydroelectric dam simply lets more water through to generate electricity. The nuclear plant just increases the reaction in the reactor and they all put it out on the grid as needed
For solar and wind it is not the same. The wind is not always blowing. The sun gets blocked by clouds and isn't around during the night. Sometimes a lot of energy is being produced but there is no demand at the time so it is lost energy.