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

January 30, 2026
US battery energy storage system (BESS) developer-operator Jupiter Power has closed a US$500 million senior secured green revolving loan and letter of credit facility to support the advancement of its project pipeline across the US.
January 30, 2026
Redwood Energy announced the final closing of its Series E financing round, bringing the total raise to US$425 million.
Premium
January 29, 2026
“We see energy storage as an opportunity for (data centres) to reduce their impact on the grid”, said Patrick Hughes, Senior VP of Operations and Strategy at NEMA.
January 29, 2026
Long-duration energy storage (LDES) developer-operator Hydrostor has announced a strategic technology and equity agreement with energy infrastructure equipment manufacturer Baker Hughes.
January 28, 2026
US sodium-ion (Na-ion) battery technology company Unigrid has begun international shipments of its proprietary sodium cobalt oxide (NCO) cathode cells at commercial volume.