The SD6 wind turbine comes in two colours, black and white. Black is the preferred colour as they blend into the countryside better. A single SD6 is often used to power an off-grid house with a diesel generator as backup. The average house consumes around ten units of energy per day (or 3600 units/year). The SD wind appropriately sited will produce enough for service power with a little left over to go towards heating, perhaps helping to offset oil, gas or biomass.