Solar water heater in Thanjavur Sri Saravanas Agencies Solar water heaters (SWHs) are systems that convert sunlight into heat to warm water for domestic, commercial, or industrial use. Unlike solar PV panels that generate electricity, SWHs directly provide hot water, significantly reducing reliance on conventional electric geysers or gas heaters. Investing in a solar water heater is a smart choice that offers long-term financial benefits, contributes to environmental sustainability, and provides a reliable supply of hot water, leveraging the region's abundant solar resource.