The Green River Energy Centre is an 800MW solar and battery energy storage facility in Emery County, Utah, US. It combines a 400MW-alternating current (540MW-direct current) photovoltaic (PV) plant with a 400MW/1.6GW-hour (GWh) battery energy storage system (BESS).
The project was developed by rPlus Energies, a developer, owner and operator of renewable energy and electric storage projects.
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Construction of the project began in September 2024 and required 849,268 labour hours.
Commercial operations commenced in June 2026. The plant has an operational life of 40 years.
The project forms part of Utah’s Operation Gigawatt initiative, which aims to double the state’s reliable energy production within ten years. It is also expected to generate more than $55m in property tax revenues over its lifetime, supporting local schools and public services.
Location
The solar facility occupies approximately 3,500 acres of previously undeveloped high‑desert terrain in Emery County, Utah, US.
Green River Energy Centre facility details
The Green River Energy Centre includes 993,492 ground‑mounted solar PV modules supplied by EliTe Solar. The solar modules are installed on 133,672 piles, which are mounted on Nextracker solar trackers that adjust the modules to follow the sun’s trajectory.
The energy storage element comprises 484 Tesla Megapack large‑scale battery units with integrated software. The system is designed to store electricity and support grid stability.
Electricity generated by the project is supplied to the grid for residential and commercial consumption and is intended to support reductions in carbon emissions.
Site preparation for the project involved more than 1.3 million cubic yards (35.1 million square feet) of cut and fill operations, slope stabilisation works, road and water culverts to enhance drainage performance and provide ground stability and site access. It also included the construction of 37 miles (59.5km) of gravel roads.
Power purchase agreement
In October 2022, rPlus Energies entered into a long‑term power purchase agreement with PacifiCorp, an electric utility company, for the offtake of electricity generated by the solar facility.
The project was proposed under PacifiCorp’s 2020 All‑Source Request for Proposals, where it was shortlisted and selected through a competitive procurement process.
The Green River Energy Centre is reported to be the largest combined solar and battery storage project within PacifiCorp’s six‑state service territory.
Financing
In July 2024, rPlus Energies secured $1.1bn in construction debt financing for the Green River Energy Centre from a syndicate of five lenders comprising Crédit Agricole Corporate and Investment Bank, KeyBanc Capital Markets, MUFG Bank (MUFG), Truist Securities and Wells Fargo Securities. MUFG served as the administrative agent for the lending group.
In June 2025, the company also secured a tax equity financing commitment of more than $500m from RBC Community Investments and a group of co‑investors to support the project.
Contractors involved in Green River Energy Centre
EliTe Solar, a PV systems provider, supplied the solar PV modules, and the solar tracking systems were supplied by Nextracker, a solar tracker and software solutions provider.
Tesla, an electric vehicle (EV) and battery solutions provider, supplied the battery storage system for the project.
Sundt Construction, a construction company, was appointed as the engineering, procurement and construction contractor for the Green River Energy Centre.
TSJ Construction, a general construction services provider, carried out earthworks for the project, while BODEC, an electrical contracting company, delivered the substation and BESS infrastructure for the project.
BHI, a general contractor, was one of the subcontractors involved in the project.
Stem, an AI‑enabled clean energy software and services provider, delivered engineering advisory and design support, including setting up metering for the energy storage system, assessing various power flow cases and validating assumptions around auxiliary demand, as well as support for the project’s network architecture and Supervisory Control and Data Acquisition design.
Hight Logistics, a port drayage services provider, collaborated with Forum Mobility, an electric truck and charging solutions provider, to use EV trucking solutions supporting the project’s sustainability goals.
Legal advisers to rPlus Energies for the construction debt financing included Norton Rose Fulbright, CCA and Dorsey & Whitney, while Sidley Austin and Snell & Wilmer advised RBC on behalf of the tax equity syndicate.
