Hotel electric power
Hotel electric power is electricity generated and used by a vehicle, especially a ship, truck or some turbo prop aircraft without APU generator for purposes other than propulsion such as climate control, communications, entertainment, lighting, refrigeration, water desalination and treatment, etc. The electrical load of such systems is termed the "hotel load".
In a railway contexts a passenger train uses head-end power for functions such as climate control, cooking, lighting, and water heating.
