Most composting toilet systems require electricity to operate heating or forced ventilation exhaust systems (fans).

If you do not have adequate power, be it 110V or 220V alternating current or 12V or 24V direct current, your only option is a passive composting toilet system (sometimes simply called a non electric composting toilet). Remember that the performance of these toilets is not as predictable, and they require exhaust pipes of at least 4 in. or more in diameter, with no bends or obstructions.