Skip to main content

Call to Actions

SDG&E’s Vanadium Redox Flow Microgrid Tour

Presented by Sumitomo Electric Industries and SDG&E

You are invited to take an exclusive tour of California’s first utility-scale Vanadium Redox Flow (VRF) battery and microgrid. 

In support of the state’s goals for 100% carbon-free electricity, grid reliability and climate resilience, San Diego Gas & Electric (SDG&E) and Sumitomo Electric Industries, Ltd. (Sumitomo Electric) undertook and successfully completed a zero-emissions microgrid pilot in December 2021 using a vanadium redox flow (VRF) battery – the first-of-its-kind to be connected to the state’s energy market in 2018. 

Different from lithium-ion batteries, the VRF battery is a proven and innovative energy storage system that is safe, non-flammable, flexible, and long-lasting. The electrolyte solution can be reused indefinitely. In fact, there are Sumitomo Electric VRF batteries in Japan that have been efficiently operating for more than 25 years. The demonstration project further shows that VRF batteries are an innovative technology that can be deployed to prevent blackouts caused by natural disasters, improve grid resiliency and integrate more clean, renewable energy into the grid.

The VRF microgrid demonstration is a joint partnership venture between Japan’s New Energy and Industrial Technology Development Organization (NEDO) and the California Governor’s Office of Business and Economic Development (GO-Biz) and was installed in 2017. 

Tour Date: Monday, February 6, 2023, 1:00 - 4:00 PM

Tour Location:  Bonita, CA

Transportation will be provided and is required for all registered attendees to use.

Learn more about the VRF Microgrid

About Our Tour Guides:

  • NEDO - New Energy and Industrial Technology Development Organization NEDO is a national research and development agency that creates innovation by promoting technological development necessary for realization of a sustainable society.
  • Sumitomo Electric Industries, Ltd. (Sumitomo Electric)
    Established in 1897, Sumitomo Electric has been manufacturing for over 125 years and has grown into a huge Global company operating in over 40 countries, with more than 280,000 employees and $27.5 Billion in net sales.
  • SDG&E – San Diego Gas & Electric / Sempra Energy
    San Diego Gas & Electric is an innovative San Diego-based energy company that provides clean, safe and reliable energy to better the lives of the people we serve in San Diego and southern Orange counties. SDG&E is a subsidiary of Sempra Energy, an energy services holding company with more than $66 billion in total assets at the end of 2020, more than 18,000 employees and delivers energy to over 35 million consumers worldwide. 




  • Photo of driver’s licenses from US citizens
  • Photo of passports from foreign nationals
  • Masks: Everyone will social distance and wear masks at all times during tour
  • Hard Hat: SDG&E will supply hard hats for all attendees
  • Safety Eye Protection
  • Closed-Toed Shoes with Rubber Soles; boots recommended.
  • 100% Natural High Fiber Clothing – Long Pants & Long Sleeve Shirts
    • Recommended Natural Fibers:
    • Wool
    • Silk
    • Cotton
  • Please do not wear man-made fibers as they are not flame resistant materials
  • Please wear sunscreen and stay hydrated!

Tech Tour is an additional $35 to your registration package




Join our mailing list!

Join our mailing list!

Be the first to know when registration opens and what’s in store for our 2024 event by joining our mailing list!