| energy commutator | Energie-Umschalter |
| energy company | Energieversorger |
| energy concept | Energiekonzept |
| energy conservation | Energieeinsparung |
| energy conservation law | Energieerhaltungssatz |
| energy conservation ordinance | Energiesparverordnung |
| energy consulting | Energieberatung |
| energy consumer | Energieverbraucher |
| energy consumers | Energieverbraucher |
| energy consumption | Energieverbrauch |
| energy consumption recording | Energieerfassung |
| Energy content | Energieinhalt |
| energy control system | Energiekontrollsystem |
| energy conversion | Energietransformation |
| Energy conversion efficiency | Wirkungsgrad |
| energy conversion plant | Energieumwandlungsanlage |
| energy conversion plants | Energieumwandlungsanlagen |
| energy conversions | Energieumwandlungen |
| energy converter | Energiewandler |
| energy convertor | Energiewandler |
| energy cost accounting | Energiekostenerfassung |
| energy cost consulting company | Energiekostenberatungsgesellschaft |
| energy cost management | Energiekostenmanagement |
| energy costs | Energiekosten |
| Energy crisis | Energiekrise |
| Energy crop | Energiepflanze |
| energy data acquisition | Energiedatenerfassung |
| energy data management | Energiedatenmanagement |
| energy demand | Energieaufwand |
| energy density | Energiedichte |
| energy density spectrum | Energiedichtespektrum |
| Energy development | Energiequelle |
| energy differences | Energiedifferenzen |
| energy dispersal | Energieverwischung |
| energy dispersive X-Ray fluorescence spectrometer | energiedispersives Röntgenfluoreszenzspektrometer |
| energy dissipation | Energieverlust |
| energy distribution | Energieverteilung |
| energy distribution plant | Energieverteilungsanlage |
| energy distribution system | Energieverteilungssystem |
| energy distributor | Energieverteiler |
