Battery Storage
Utility-scale economics — duration, cycle life, and the arbitrage trade that pays for the asset
In 2010, the cost of a lithium-ion battery cell at industrial scale was approximately $1,200 per kilowatt-hour, per BloombergNEF's annual Lithium-Ion Battery Price Survey. By 2024, the volume-weighted average cost of a lithium-ion battery pack (cell plus module plus pack assembly) had fallen to approximately $115/kWh per BloombergNEF tracking — a decline of roughly 90% over fourteen years. The cost-decline trajectory is one of the most consequential industrial cost-curve transformations in modern energy history, comparable in magnitude to the solar PV LCOE decline (~83% from 2009 to 2024 per Lazard LCOE+, covered in lesson en1_l11).
Battery cost decline transformed multiple industries: it made electric vehicles cost-competitive with internal combustion vehicles in many use cases (Tesla, Ford, GM, BYD, others); it enabled grid-scale energy storage projects to economically arbitrage daily price spreads (charge during midday solar surplus, discharge during evening peak); it underpinned the integration economics of intermittent renewable energy at scale.
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What this lesson covers
- 1Duration — the most important metric for utility-scale storage
- 2The CAISO duck curve and the storage solution
- 3LCOS, the storage-equivalent of LCOE
- 4U.S. battery storage — major operators and deployment context
- 52010-2024 lithium-ion battery cost decline — from $1,200/kWh to $115/kWh
- 6Where to see this on the platform
- 7Summary