PacifiCorp and rPlus have quadrupled the size of the Utah BESS project from its planned size to 1,600MWh by quadrupling the size to include a 1,800MWh battery energy storage system (BESS) and 400MW of solar PV. The project will start construction in Q2 2024 and will feature a total of 400MW/1,600 MWh, a 4-hour duration system. The current largest BESS unit is at the Edwards Sanborn solar-plus-storage facility in California. The company, rPlus Hydro, is also working on developing pumped hydro energy storage projects in Wyoming and Utah. The Utah project, which will require US$1 billion of capital investment, will be brought to the market for tax and debt financing later this year.

Solar Dominates US Energy Capacity Growth
The Federal Energy Regulatory Commission (FERC) has published data showing that solar accounted for over 75% of US electrical generating







