this post was submitted on 01 Oct 2024
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I wouldn't go so far as to call it waste. It's an inherent problem of any energy storage, and we need energy storage if we want to go all in on renewables. Storage has to pay for the energy it stores and can only sell that energy for profit if there is enough demand on the grid, so it sits idle for a lot of time, but you still have the building and maintenance costs.
My wording was poorly chosen. You are right of course. Its not a waste in that sense. But when better alternatives are available, which will hopefully soon achieve an acceptable level of efficiency, it makes no sense to build more. Apart from the space problem.
It's only wasted money because we deliberately chose to have for profit businesses run infrastructure essential to the functioning of a modern society. In a nationalised power grid, it wouldn't matter that a storage system has to use electricity in order to store it, because all that matters is meeting the demand and keeping the grid stable. Of course, if all that matters is profits, storage systems will only be economical to a very small subset of operators.