Renewable energy developer rPlus Energies said it recently amended a PPA with PacifiCorp to quadruple the battery storage capacity at the Green River Energy Center project under development.

The project, in Emery County, Utah, was designed as a 400 MW solar PV facility integrated with a battery storage system. This expansion would increase the project’s storage capacity from 400 MWh to 1,600 MWh, making it one of the largest solar-plus-storage projects under development in the U.S.

The project involves capital investment of more than one billion dollars and will commence construction in the second quarter of 2024, rPlus said.

The developer last month announced it secured up to $460 million in investments from Sandbrook Capital. The partnership would include continued support from Gardner Group, the founding investor in rPlus and a leading commercial real estate company in the Mountain West.

rPlus currently has a 15 GW pipeline of solar, wind, battery and pumped storage hydropower projects.

Over the last five years, rPlus has developed over 630 MW of solar and wind projects that are now in service or under construction, including Graphite Solar and Appaloosa Solar, two operational Utah-based solar PV facilities.

rPlus is also currently managing construction on rPlus-developed Pleasant Valley Solar, the largest solar PV facility in the Idaho Power system, while a 152 MW wind project rPlus sold to Clearway Energy Group is also nearing completion.

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