Battery Energy Storage Revenue Shifts to Power, Forecasting Becomes Essential Revenue streams for battery energy storage systems in the United States have undergone substantial changes over the past three years, according to David Miller, chief commercial officer of Gridmatic. These observations were made during a discussion at the 2026 US Battery Asset Management Summit held

David Miller, Chief Commercial Officer of Gridmatic, recently spoke at the Battery Asset Management Summit USA in Anaheim, California. The summit was hosted by Solar Media, a division of Informa Group. Significant changes have occurred over the past three years in how battery energy storage systems (BESS) generate revenue within the United States, particularly impacting

Energy-Storage.news Premium speaks with David Miller, CCO of Gridmatic, at the 2026 US Battery Asset Management Summit in California.

The shift towards energy revenues has made bid optimisation significantly more challenging, Miller explains. When ancillary service revenues dominated, operators could employ relatively simple strategies. Now, with energy arbitrage becoming the primary revenue source, accurate price forecasting has become critical. “Even in California, where we think of battery resources bidding into the duck curve—charge in the middle of the day, discharge in the evening—it is somewhat challenging to predict when the actual peak periods will occur and which hours to use,” Miller says. He notes that many batteries are discharging too early during evening peaks, particularly in ERCOT, where “the peak ends up moving later, when the battery state of charge (SoC) has been empty.” Miller emphasises that forecast quality is the most important factor in maximising battery value. “Our view is it really comes down to forecast quality. The optimisation—you can only learn the market rules so well. They are what they are. But forecast error is still extraordinarily high, and it’s a really hard problem to get forecasts right.” The challenge is particularly acute because batteries can participate in both day-ahead and real-time markets, and predicting the differences between these markets is “a very, very challenging problem,” he...

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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 executio...

Energy-Storage.news Premium speaks with David Miller, CCO of Gridmatic, about the company’s latest report from CAISO.

Energy-Storage.news Premium speaks with David Miller, CCO of Gridmatic, about the company’s latest report from CAISO.

BESS operating in CAISO left US$98 million on the table due to suboptimal bidding strategies, according to a new analysis from Gridmatic.

**Battery Storage Systems Missed Millions in Potential Revenue Due to Bidding Strategies** A recent analysis indicates that battery energy storage systems operating within California’s grid missed out on approximately US$98 million in potential revenue due to suboptimal bidding strategies. The findings, released June 24 by Gridmatic, a company specializing in grid forecasting and battery optimization,

BESS operating in CAISO left US$98 million on the table due to suboptimal bidding strategies, according to a new analysis from Gridmatic.

Gridmatic Report Details Performance Disparities Among California Battery Storage Systems A new report released by power optimization firm Gridmatic in June 2026 highlights a significant disparity in the financial performance of utility-scale battery energy storage systems (BESS) within California. The CAISO Storage Report, covering 2024 and 2025, analyzed publicly available market data, regulatory filings, and

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.