Elum Hybrid Fuel Saver (HFS) is a power controller dedicated to solar & diesel hybrid power plants. It allows the integration of a high solar penetration rate on diesel installations in order to reduce their fuel consumption. Connected to PV inverters and generator controllers, it manages the overall power distribution of the system. Thus, it allows to maintain maximum operational safety and power reliability without the need for storage capacity.

It was designed to facilitate the deployment of hybrid power plants in isolated areas and to provide flexibility of adaptability to future changes in plant configuration.