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A comment on A Solar Power Plant designed to deliver 100% of the electricity after sunset.
It doesn't say the specific chemistry but it shows a chart estimating 6000 100% charge/discharge cycles at 1C until it hits 80% capacity.
So for this system that'd be 16 years of full cycles till it wore down to being "only" a 240MWh system.
In reality they'll probably cycle it less aggressively than that (95/5 or 90/10) to meet the expected 25 year lifetime of the overall system.
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It doesn't say the specific chemistry but it shows a chart estimating 6000 100% charge/discharge cycles at 1C until it hits 80% capacity.
So for this system that'd be 16 years of full cycles till it wore down to being "only" a 240MWh system.
In reality they'll probably cycle it less aggressively than that (95/5 or 90/10) to meet the expected 25 year lifetime of the overall system.