RWE Completes 3 BESS Projects Totaling 190 MW in Texas and Arizona

Feb. 16, 2024
The three projects – Bright Arrow, Big Star, and Mesquite 4 – will bring RWE’s total battery storage capacity to about 512 MW in the US

RWE is expanding its green energy portfolio with the completion of three battery energy storage systems (BESS) totaling 190 MW (361 MWh) in Texas and Arizona as part of its Growing Green Strategy.

The three projects – Bright Arrow, Big Star, and Mesquite 4 – will bring RWE’s total battery storage capacity to about 512 MW in the US. Each project is also paired with solar, allowing them to store excess energy and return it to the grid in the future.

The three BESS projects include:

  1. Bright Arrow: 100 MW (200 MWh) battery storage with 300 MWac solar PV project in Sulphur Springs, Texas. The project came online in December 2023, with an additional 200 MWac of solar scheduled to achieve commercial operation by Spring 2024. The BESS will participate in the ERCOT market, and the solar PV electricity output will be provided to an affiliate of NRG Energy.
  2. Big Star: 80 MW (120 MWh) battery storage and 200 MWac solar PV project in Bastrop County, Texas. Big Star is completing the testing and is scheduled to achieve commercial operation in March 2024. The BESS will participate in the ERCOT market, and the solar PV electricity output will be provided to a third party.
  3. Mesquite 4: 10 MW (40 MWh) battery storage and 52.5 MWac solar project in Maricopa County, Arizona, which is expected to come online in late February 2024. The solar PV electricity output and BESS services will be provided to Modesto Irrigation District (MID).

RWE’s battery storage capacity is about 700 MW, with more than 1 GW under construction globally.

A 220 MW project is being constructed at two locations in North Rhine-Westphalia, and a 35 MW BESS is being developed at RWE’s Eemshaven power plant in the Netherlands.

“Battery storage is growing even more critical to enable the rapid deployment of wind and solar projects, help stabilize the U.S. power grid, and better ensure that enough electric supply is available to meet demand,” said Andrew Flanagan, CEO of RWE Clean Energy. “As part of our Growing Green Strategy, we’re planning to increase our battery portfolio globally to 6 gigawatts by 2030, and these three new systems are contributing to that goal.”