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San Antonio, Texas – (October 8, 2018) – CPS Energy has taken a major step in using new technology to produce emission-free renewable energy during high energy use days. This focus on reliability, environmental stewardship and innovation was announced today as Greater San Antonio’s natural gas and electric provider broke ground on their first solar energy and battery storage project. The project is a culmination of three years of work which included a partnership with  Southwest Research Institute (SwRI). For their part, SwRI is providing nearly 50 acres of land on which the solar facility and battery storage system will be constructed. SwRI aims to gain valuable insight into the efficiencies of both solar production and battery energy storage. Sharing that information with CPS Energy will provide the utility with vital information that someday may lead to similar projects on a larger scale as they continue to execute their Flexible Path.

The $16.3 million project, which will be constructed by  RES Americas, was approved earlier this year by CPS Energy’s Board of Trustees. The site will consist of a 5 megawatt (MW) solar power facility and a 10 MW battery storage system located at 9800 W. Commerce in San Antonio.

“Today we took a very important step in advancing our technology in regards to battery storage,” said Paula Gold-Williams, President and CEO for CPS Energy. “Working with Southwest Research Institute, we will expand our knowledge of solar energy and battery storage and further expand our energy expertise. For us, the most important thing is to meet this community’s energy demand today and tomorrow. This project aligns with our Flexible Path strategy and allows us to reduce our carbon footprint while at the same time incorporating battery storage into our system.”

“CPS Energy has proven that serving this community with reliable and affordable service is top- of-mind,” said City of San Antonio Councilman Greg Brockhouse. “That focus is evident in the way they conduct themselves and the emphasis they place on their People First philosophy. This project is a testament to their open-mindedness and vision for a better San Antonio.”

As a leader in developing alternative energy and battery technologies, SwRI will help showcase the site as an example of energy innovation. “As beneficial as the site will be to the city’s energy future, SwRI will also benefit by leveraging the facility to become even more active in the grid- scale energy storage industry, and to work with battery suppliers and component manufacturers,” said Daniel Stewart, Vice President of the SwRI Powertrain Engineering Division.

In 2016, CPS Energy applied for and was awarded a  New Technology Implementation Grant (NTIG) for $3 million from the Texas Commission on Environmental Quality (TCEQ) to fund part of the project cost. The primary objective of the NTIG program is to offset the cost of the implementation of existing technologies that reduce the emission of pollutants from facilities and other stationary sources which may include electricity storage projects in Texas.

The goals of the NTIG are to:

  • Improve the quality of air in Texas in order to meet federal standards established under the Federal Clean Air Act (42 U.S.C. Section 7407).
  • Facilitate the implementation of new technologies to reduce emissions from facilities and other stationary sources in the state.
  • Adequately fund the implementation of new technologies that will make the state a leader in new technologies that can solve the state’s environmental challenges while creating new business and industry in the state.

CPS Energy says the project will allow for solar shifting. This means energy is captured when solar production is at its peak, generally between noon and 2 p.m., can be stored in onsite batteries and dispatched when energy demand is at its peak in San Antonio, between 3-7 p.m.

CPS Energy received and evaluated 22 proposals for an engineering, procurement and construction contractor for this project. The energy company selected RES based on their combination of value, technology and financial ability for the construction and turnkey installation of the project.

“RES is excited to partner with CPS Energy to construct a solar and energy storage project,” says Tom Duckett, RES Executive Vice President.  “Having 3 GW of wind and 238 MW of solar already constructed or under construction in the state, this will mark RES’ first energy storage project in Texas and will utilize RES’ industry leading energy storage control platform RESolve.”

Additionally, there are plans to utilize an existing building on the site to develop an educational facility for students and the general public to tour and learn about innovative technologies being used by the utility.

The site is expected to be online in the summer of 2019.

Click here for event photos.

John Moreno

John is part of the Corporate Communications team at CPS Energy.


  • Great first step. This can provide valuable data for additional use of renewable resources and accelerate the reduction of carbon based fuels.

  • Solar energy and battery storage are a long-term money-saving way. Other states also learn from CPS Energy and must start this sot of projects. Great starts keep it up.


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