FlexGen to build largest energy storage system in Texas co-located with solar

Facebook
Twitter
LinkedIn
Reddit
Email

Texas IPP Vistra Energy has contracted energy storage integrator FlexGen to install a 10MW / 42MWh energy storage system (ESS) at the 180MW Upton 2 Solar Power Plant in Texas.   

The lithium-ion storage system, which uses FlexGen’s Hybrid OS software, will be completed in late 2018. It will be the largest storage project in Texas and the seventh largest in the US.

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

“Vistra is leading our country’s transformation toward a reliable, low cost, sustainable energy mix and we’re thrilled to be supporting its storage strategy,” said Josh Prueher, FlexGen CEO. “The power grid of the future will see energy storage integrated on site with solar, wind, and gas generation, and the Upton solar plus storage project is a trailblazing example.”

FlexGen is backed by Altira Group, General Electric (GE) and Caterpillar. Its storage system will be used to store solar power generated during the day and deliver it to customers during evening hours when demand is greatest, improving grid reliability.

13 October 2026
San Francisco Bay Area, USA
PV Tech has been running an annual PV CellTech Conference since 2016. PV CellTech USA, on 13-14 October 2026 is our fourth PV CellTech conference dedicated to solar manufacturing in the USA. From polysilicon, wafers, ingots, cells and modules, to critical component suppliers including glass and frames, the event connects every stage of the value chain under one roof. PV CellTech USA also brings together investors, innovators, manufacturers and industry stakeholders to collaborate and strengthen domestic solar manufacturing across the United States.

Read Next

July 24, 2026
Solar manufacturing giant Canadian Solar has opened the first phase of a 6GW heterojunction technology (HJT) solar cell facility in Jeffersonville, Indiana.
Premium
July 24, 2026
PV Tech Premium spoke with Mike Carr, executive director of the SEMA Coalition, about the hollowing out of domestic demand for US solar manufacturing under the Trump administration, the way that US companies are piecing together supply chains and the reasons to still hope for the sector’s future.  
July 24, 2026
Panamint Capital has broken ground on the 1.2GWdc solar PV project at its Twin Oaks power station in Robertson County, Texas.
July 24, 2026
Taiwanese solar PV manufacturers Sino-American Silicon Products and United Renewable Energy Co. have formed a joint venture to establish a module assembly plant in the US.
July 23, 2026
MN8 Energy has acquired Greenbacker, creating 6GW US renewable platform amid rising data centre power demand.
July 23, 2026
SEIA has warned that growing solar and storage deployment requires more resilient supply chains and security standards.

Upcoming Events

Solar Media Events
October 13, 2026
San Francisco Bay Area, USA
Solar Media Events
November 3, 2026
Málaga, Spain
Solar Media Events
November 24, 2026
Warsaw, Poland
Solar Media Events
April 20, 2027
Istanbul, Türkiye