https://w3id.org/saref4ener#powerSource
Property s4ener:powerSource

owl:DatatypeProperty

Indicates the power source of a device. Possible values are e.g. mainsSinglePhase or battery

power source

{"s4ener:unknown" , "s4ener:mainsSinglePhase" , "s4ener:mains3Phase" , "s4ener:battery" , "s4ener:dc"}