San Diego Walmart Moves Forward with Refrigeration Energy Storage Demo

A San Diego Walmart store will begin testing a refrigeration battery system that uses the store’s existing refrigeration to store cooling at night by freezing tanks of salt water.

Walmart selected Axiom Exergy to install the energy storage system.

According to Axiom, the refrigeration battery “discharges” like a battery, providing cooling services for seven hours and reducing the store’s peak electricity demand by up to 40 percent.

KW Engineering will provide third-party measurement and verification for the field demonstration project.

“Walmart is actively evaluating different energy storage technologies that have the potential to reduce our operating costs and improve stores’ resilience during power outages and extreme weather events across our portfolio,” Mark Vanderhelm, vice president, energy, Walmart, said in a Nov. 15 statement.

The field demonstration with Walmart is funded by utility members of California’s Emerging Technologies Coordinating Council.

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