It's a PowerControl. PowerControl is an active switch control to supply energy from a commercial company or a combustion power generator to a set of load like home appliances in a house, apartments, and others. The control uses arduino as main controller to a mechanical switch.
This mechanical switch receives in its two inputs, the commercial energy and the output of a power generator. Its output supply the energy to load from commercial energy company or a power generator based in the wanted controls. the switching in the mechanical switch occurs using a selenoid. The human user controls as wished it guided by a manual set of others switches and a display to view status and configuration.
Below we explain the main functions of the PowerControl: