Complex sentence: Most of the homes use solar photovoltaics, with a few complimented with wind turbines for electric power, propane is used for heating and cooking, and rain water is captured into cisterns from their roofs.
Split into simpler sentences: Most of the homes use solar photovoltaics, with a few complemented by wind turbines for electric power. Propane is used for heating and cooking, and rainwater is captured into cisterns from their roofs.