The 2.5 kWh turbine produces an average power output of 600 watts, depending on wind speed, which the Castaways use to light the living pods, the old McKay House and the school. There is a ban on other uses of the electricity and the stoves are fuelled through driftwood or bottled gas. The island has wind and water aplenty, so water is the second source of generating power, providing back-up electricity on the rare windless days. The crystal clear waters of Loch na Gaoithe powers the hydro turbine, providing another 80-100 kWh a week. Together the two turbines provide more than enough electricity to meet 100kWh per week demand.
Compost toilets provide excellent fertilizer for the crops on the island.