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.
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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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