Passive solar water heater is highly recommended in Africa, such as Kenya, Zambia, Zimbabwe, Nigeria and South Africa.
Africa is often considered and referred as the "Sun continent" or the continent where the Sun's influence is the greatest. Solar energy can be use for water heating or solar water heater.
Passive solar water heater has a big potential market in Africa. Now the government in Kenya and some other countries all give the policy to support the solar water heater project.