Technical FAQs 3

How much does a rated energy storage capacity cost?

An average price of $16/MW-h is applied to the rated energy storage capacity for regulation control, and $3/MW-h for spinning reserves, for the purposes of this Handbook.

What is the difference between rated capacity and usable capacity?

Rated Capacity (also called total capacity) refers to the maximum theoretical energy a battery can store when fully charged, typically measured in kilowatt-hours (kWh). It is the "design limit" listed in product datasheets, reflecting ideal conditions. Usable Capacity (or net capacity) is the actual energy that can be discharged during operation.

What is the difference between a design limit and a usable capacity?

It is the "design limit" listed in product datasheets, reflecting ideal conditions. Usable Capacity (or net capacity) is the actual energy that can be discharged during operation. It accounts for safety margins, system limitations, and Depth of Discharge (DOD)—a key factor in balancing performance and battery longevity.

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What does the rated capacity of the energy storage cabinet have to do with

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