The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Streckgrenze (2 members)
- MassPerUnitVolume (0 members)
- Technology (1 member)
- KnotenSeriennummer (0 members)
- ThermoChemicalHeatStorageObject (2 members)
- GridConnectionCost (0 members)
- ModelCalibration (0 members)
- Country (0 members)
- ChemicalCompound (1 member)
- ElectricalConductionUnit (3 members)
- OrganisationalEnergyProducer (2 members)
- RemoteFile (1 member)
- SetPoint (0 members)
- CuriePerLiter (0 members)
- NaturalHydroEnergy (3 members)
- ConductionUnit (2 members)
- CubicMeter (0 members)
- LiquidMetalBattery (0 members)
- CombustionBasedHeater (0 members)
- SteamElectricProcess (1 member)
- Micromolar (0 members)
- EmissionScenario (0 members)
- SteamPowerUnit (0 members)
- SpecificallyDependentContinuant (4 members)
- FieldPhotovoltaicPowerPlant (0 members)
- UndergroundFuelStorageObject (1 member)
- Pascal (0 members)
- ExogenousData (0 members)
- BuildingFunction (0 members)
- MicroliterPerKilogram (0 members)
- Modus (0 members)
- TransformativeMeasure (0 members)
- MillimetresOfMercury (0 members)
- ArealSolarPowerDensity (1 member)
- Evaporation (0 members)
- PrimaryControl (0 members)
- DieselFuel (2 members)
- ChargeRate (0 members)
- PtlFuel (0 members)
- OSW087bcebfb4775160b5e9bb901b4ea36c (1 member)
- GeothermalHeatPlant (0 members)
- TidalFlow (0 members)
- WaterFlowRate (0 members)
- AdiabaticCompressedAirEnergyStorageUnit (0 members)
- Assemblierungsprozess (3 members)
- HydrogenPowerUnit (0 members)
- SteamTurbine (0 members)
- MilliliterPerLiter (0 members)
- UserDocumentation (0 members)
- EnergyDemandSector (5 members)