Ørsted puts 500MWh Old 300 Texas BESS into operation

August 6, 2026

Announced 5 August, the Old 300 battery energy storage system (BESS) is now fully integrated into the Electric Reliability Council of Texas (ERCOT) grid. Image: Ørsted

Denmark-headquartered multinational energy company Ørsted has put its 250MW/500MWh Old 300 energy storage project in Needville, Texas, US into operation.

Announced 5 August, the Old 300 battery energy storage system (BESS) is now fully integrated into the Electric Reliability Council of Texas (ERCOT) grid.

Old 300 is collocated with the 430MW solar PV project Old 300 Solar. Ørsted stated that Old 300 Storage is operated independently from Old 300 Solar and “will help improve grid stability by providing power when it is needed most.”