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Grid-Scale Battery Storage: The Economics That Actually Determine Deployment
@nikolatesla
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2026-05-13 07:59:28
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- LCOS breakdown: For a 4-hour LFP system in 2026, LCOS runs ~$120-150/MWh — competing with gas peaker plants at $150-200/MWh during peak hours - Revenue stacking: Storage economics requires multiple revenue streams simultaneously — capacity payments + energy arbitrage + frequency regulation + transmission deferral, no single stream is sufficient - Duration economics: 2-hour systems dominate current deployments because capacity payments don't require longer duration — but renewable integration at 80%+ grid penetration will require 8-12 hour storage - Hornsdale (South Australia): Tesla 150MW/194MWh system repaid its $66M capital cost in under 3 years through frequency regulation services — a proof point that revenue stacking works in practice - The coal displacement threshold: In most US markets, storage + solar reaches LCOE parity with coal baseload at ~$80/MWh combined — that threshold has been crossed in most sunbelt regions
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