Unlike ERCOT, CAISO anonymizes public market data, masking resource identities and obscuring asset-level activity. A report by Gridmatic reveals that static bidding strategies and operational execution create a wide gap in performance across the state’s utility-scale battery energy storage assets.
California’s battery storage capacity has expanded to 17.4 GW over the past six years, yet tracking the financial performance of individual assets remains difficult.
Unlike ERCOT, CAISO anonymizes public market data, masking resource identities and obscuring asset-level activity. To close this visibility gap, power optimization firm Gridmatic published its CAISO Storage Report 2024-2025 in June 2026.
The study uses public market inputs, regulatory filings, and a proprietary shadow-clearing engine to unmask and reconstruct the performance of 30 battery energy storage systems (BESS) representing 2.3 GW of capacity.
The findings show that location and market pricing are only partial drivers of battery revenue. Instead, operational execution and bidding strategies create a wide performance gap between top- and bottom-performing assets.
