ERCOT August 2026 BESS benchmark: Real-Time spreads double to $86/MWh on late-month scarcity; June revenues settle at $1.11/kW-month
ERCOT August 2026 BESS benchmark: Real-Time spreads double to $86/MWh on late-month scarcity; June revenues settle at $1.11/kW-month
Volatility returned to ERCOT in August. Real-Time TB1 spreads averaged $86/MWh, up 116% from July and 47% above August 2025, the highest since April. Day-Ahead TB1 spreads rose 23% month-over-month to $55/MWh, still 30% below last August. Five spike days in the back half of the month drove the move and concentrated battery revenue opportunity.
What did ERCOT batteries earn as Real-Time spreads doubled in August?
Modo Energy's Benchmarks measure realised BESS revenue in ERCOT and attribute it by service and strategy, from energy arbitrage to ancillary services.
Explore the ERCOT benchmark →June, the latest month with settled revenues, saw average battery revenues of $1.11/kW-month, the lowest recorded in ERCOT. That is also 34% below May's $1.67 and 43% below June 2025.
Have any questions or feedback? Contact the author at alejandro@modoenergy.com.
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