Close this search box.


Stay up-to-date on the latest information. SUBSCRIBE FOR UPDATES


Make valuable connections and source new business partners by exhibiting. BECOME AN EXHIBITOR

Stay Informed

Stay Up-to-Date with #IESNA.


Site Tours

SDG&E's Vanadium Redox Flow Microgrid Tour

Presented by Sumitomo Electric Industries and SDG&E

Intersolar & Energy Storage North America (ISNA/ESNA) invites you 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/Time: Tuesday, January 16, 2024 – 9:30AM – 12:00 PM PT

Location: Bonita, California

Fees: The tour is $25 and can be purchased/added to your ISNA/ESNA registration. 

Transportation is provided and required for all registered tour attendees to use. Transportation will depart from the San Diego Convention Center at 9:30AM and return around 12:00 PM. 

Registration for the tour is limited to 100. After the 100 spots have been filled, registration for the tour will be closed. 

 Learn more about the VRF Microgrid

About the VRF Tour Guides:

  • 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. Sumitomo Electric is focusing on redox flow battery business all over the world, especially in North America.
  • 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. 




All Tour Guests Need to Wear:

  • Hard Hat & Safety Eye Protection – SDG&E will supply hard hats for all attendees
  • Closed-Toed Shoes with Rubber Soles; boots recommended.
  • 100% Natural High Fiber Clothing – Long Pants & Long Sleeve Shirts
    • Recommended 100% 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!

Presented by:

© Diversified Communications. All rights reserved.