Residential applications of renewable energy can contribute to reducing greenhouse gas emissions while improving the quality of life for households. Thermosiphon solar water heaters are passive systems using solar energy to supply hot water for residential or industrial use. Replacing fuels or electricity for heating, solar water heating systems can substantially reduce a household's energy demand. Despite the economic and environmental benefits, several barriers hinder the broader adoption of solar water heating in Bolivia. These include an investment barrier due to the high upfront costs,...