Executive Summary

• ERCOT saw a record-breaking 731 MW of new battery energy storage capacity come online in September 2024, bringing total operational capacity to 6.4 GW.
• ENGIE became the first battery owner in ERCOT to surpass 1 GW of operational capacity.
• Longer-duration batteries are increasingly favored as Energy arbitrage revenues grow, while Ancillary Service prices continue to decline.

Subscribers to Modo Energy’s Research will also find out:

• How battery buildout trends vary by ERCOT load zone, with the South Load Zone leading 2024 installations.
• Why Plus Power and Jupiter Power hold the most energy capacity, despite ENGIE leading in rated power.
• How ERCOT’s shifting revenue mix is shaping investment in battery duration and market strategies.

To get full access to Modo Energy’s Research, book a call with a member of the team today.

Introduction

In September, six new battery energy storage systems became commercially operational. In total, this resulted in 731 MW of new capacity by rated power - a record for a single month.