How it Works: Retrofit Refrigeration Battery

Axiom’s proprietary Retrofit Refrigeration Battery (RB) is the first and only thermal energy storage solution for central refrigeration. It adds a thermal “gas tank” to large, inflexible medium-temperature refrigeration systems, enabling active power management without violating strict product temperature requirements.


Intelligent energy storage designed specifically for the cold chain

Why store electricity using expensive, short-lifespan lithium-ion batteries if you can use ice to “store cooling” instead? The Retrofit RB is a non-invasive retrofit that adds 6-8 hours of thermal energy storage capacity to your existing central refrigeration system. The RB offers a substantially lower installed cost and a 10x lifecycle cost advantage over li-ion battery systems, and it avoids the lifespan and degradation issues that plague traditional electrochemical systems. The RB freezes a tank of phase change material - effectively "storing cooling" for later use. The RB can then intelligently deploy that cooling to offset power consumption of the refrigeration system, reshaping the building’s power consumption on demand.



Non-invasive, modular energy storage retrofit

The RB arrives onsite as two fully-preassembled 20-ft containers, and 100% of the RB’s components are also used in typical thermal systems. The containers can be placed inside or outside of the building and can be stacked. The RB is a non-invasive retrofit that plugs into the existing central refrigeration system just like a new display case, only requiring power and connections to the liquid and suction headers (integration with the existing control system is optional).



Equal parts hardware and software

The RB provides flexibility to medium-temperature refrigeration systems for the first time. It is driven by the Axiom Cloud, which uses machine learning and predictive analytics to continuously adjust the rate at which each RB is charging or discharging to help maximize savings and revenue for the entire building. It intelligently adapts to weather, building load changes, new utility tariffs, demand response programs, etc. in order to co-optimize multiple services simultaneously across a building portfolio.