The capacity of grid-scale batteries is typically measured in megawatt hours (MWh), which explains how long the battery can replace a specific amount of generated electricity per hour. Most modern grid-scale batteries have up to four hours of storage capacity at maximum output. [pdf]
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The cost of energy storage varies depending on the technology used, but here are some average figures:In 2025, the average cost for lithium-ion battery packs is about $152 per kilowatt-hour1.Costs for lithium-ion batteries typically range from $400 to $600 per kilowatt-hour2.Overall, energy storage costs generally range from $100 to $600 per kilowatt-hour3.These figures reflect the current market trends and technology advancements in energy storage systems. [pdf]
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