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

June 20, 2018
LinkedIn
Twitter
Reddit
Facebook
Email
The 180MW Upton 2 Solar Power Plant in Texas. Credit: Vistra Energy

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.

“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.

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

24 March 2026
Dallas, Texas
The Energy Storage Summit USA is the only place where you are guaranteed to meet all the most important investors, developers, IPPs, RTOs and ISOs, policymakers, utilities, energy buyers, service providers, consultancies and technology providers in one room, to ensure that your deals get done as efficiently as possible. Book your ticket today to join us in 2026!

Read Next

December 4, 2025
RWE Clean Energy has commissioned the Stoneridge Solar PV project in Texas, adding 200MW of solar PV and 100MW/200MWh BESS to its operational portfolio.
Premium
December 4, 2025
A subsidiary of utility Northern Indiana Public Service Company (NIPSCO) has struck a deal with Amazon to construct 3GW of new dispatchable capacity, with the aim of serving the tech company’s planned data center expansion.
December 4, 2025
PJM has awarded 23 battery energy storage system (BESS) resources, totalling 2.2GW, with interconnection agreements (IAs) in its first transition cycle (TC1) of the reformed interconnection process.
December 2, 2025
South Carolina public utility company Santee Cooper has applied for a Certificate of Environmental Compatibility and Public Convenience and Neccessity (CECPCN) with the state’s public service commission (PSC), for its 300MW/1,200MWh battery energy storage system (BESS).
Premium
December 2, 2025
Shifting dynamics in the US’ BESS industry could mean that Chinese batteries are not even needed within the foreseeable future, a local consultant told Energy-Storage.news.