Origis Energy brings Mississippi solar PV plant online with first BESS in three-project portfolio

By JP Casey
June 4, 2024
LinkedIn
Twitter
Reddit
Facebook
Email

US renewable energy developer Origis Energy has commissioned a 150MW solar-plus-storage project in the US state of Mississippi.

The project, Golden Triangle II, includes a 50MW battery energy storage system (BESS), and started producing electricity on 21 May. The project is part of a three-facility portfolio, including the Golden Triangle I project and the Optimist project, which each have 200MW of solar generation capacity alongside 50MW of BESS capacity.

This is the largest storage portfolio under construction in Mississippi, and Origis expects to commission all three projects next year.

“Golden Triangle II is the first step in fostering a zero-carbon economy across the state that supports our nation’s economic and energy security goals,” said Origis chief commercial and procurement officer Johan Vanhee.”

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

Origis signed a power purchase agreement (PPA) to sell power generated at the projects to the Tennessee Valley Authority (TVA), a utility, at what the companies called “competitive rates”. TVA will use the power to meet the energy demand of its large industrial customers, including Meta, which is among the leaders in clean power acquisition in the US, having signed a PPA with Pine Gate Renewables earlier in May.

TVA has announced plans to expand its renewable energy portfolio in recent years, aiming to add 10GW of new solar generation capacity by 2035, up from 2.4GW in operation currently. The TVA operates predominantly in Mississippi, which has one of the smaller solar sectors in the US, with the Solar Energy Industries Association (SEIA) expecting developers to add just 2.2GW of new capacity to the Mississippi solar sector in the next five years, 24th among the states.

In January, Origis announced that it had received US$317 million in funding from J.P. Morgan to support the development of both the Golden Triangle II project, and the 200MW Escalante Solar project in New Mexico.

This story first appeared on PV Tech.

Read Next

March 17, 2026
A joint venture between TotalEnergies and Eren Groupe has submitted a 6GWh solar-plus-storage project for environmental approval in Australia’s Northern Territory (NT).
March 12, 2026
New Jersey’s regulator has approved the construction of battery storage facilities and a procurement for further energy storage resources in the PJM-connected US state.
March 11, 2026
Energy firm RWE added 2GW to its US operating capacity in 2025, bringing its total operational capacity to nearly 13GW across the country.
Premium
March 10, 2026
Joshua Murphy, head of energy storage for IPP Econergy, met with Energy-Storage.news for a video interview to discuss various business and financial topics at the Energy Storage Summit 2026 in London last month.
March 10, 2026
Octopus Australia has broken ground on the 486MWh Blind Creek Solar Farm and Battery site in New South Wales (NSW).