Energy Storage Duration → Term
Energy storage duration specifies how long stored energy can be released at a given power level, addressing temporal mismatches between generation and consumption.
If the grid has a very high load for eight hours and the storage only has a 6-hour duration, the storage system cannot be at full capacity for eight hours. So, its ELCC and its contribution will only be a fraction of its rated power capacity. An energy storage system capable of serving long durations could be used for short durations, too.
An energy storage system capable of serving long durations could be used for short durations, too. Recharging after a short usage period could ultimately affect the number of full cycles before performance declines. Likewise, keeping a longer-duration system at a full charge may not make sense.
Importantly, long-duration storage differs from long-term storage: long duration describes the time a battery can consistently discharge, while long-term–or seasonal–storage describes how long a battery can store energy before it must be used.
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