This is the ideal 'retrofit' energy optimising solution for Soft Starting single phase compressors such as those used in Supermarket refrigerators and chillers etc., and can yield between 10 -18% energy savings. It has a rugged tin lid construction and can be mounted easily next to the machine or control panel. Installation of the unit is quick and simple due to the 'two wires in, two wires out' design. The unit is 'fit and forget' is there is no maintenance for the user.

Offering advantages over simple energy optimisers for similar cost, HFE provides mechanical and electrical stress reduction or elimination and optimised energy consumption when a chiller/refrigerator compressor is not under load. The starting current is reduced, and smooth acceleration is applied to the load.