Rank #25
Use a solar water heater.
This solar water heater is an energy-efficient and cost-effective way to heat your home's water supply. It uses the sun's energy to heat the water, eliminating the need for electricity or gas. The system is easy to install and requires minimal maintenance. It can also help reduce your
From Wikipedia
Solar water heating (SWH) is heating water by sunlight, using a solar thermal collector. A variety of configurations are available at varying cost to provide solutions in different climates and latitudes. SWHs are widely used for residential and some industrial applications.