300Litres Solar Water Heater Non-pressurized

A solar water heater (SWH) is a device that uses energy from the sun to heat water for domestic, commercial, or industrial use. It captures solar radiation through special panels called solar collectors and converts that energy into heat, which warms the water stored in a tank.

Main Components

Solar Collectors
Panels installed on rooftops or open areas that absorb sunlight and convert it into heat.

Storage Tank
An insulated tank that stores the hot water produced by the system.

Circulation System
Pipes and pumps (or natural circulation) that move water between the collector and the storage tank.

Controller (in some systems)
Regulates pumps and ensures efficient heat transfer.

How It Works

Sunlight falls on the solar collectors.

The collectors absorb heat and transfer it to the water inside the pipes.

Heated water moves into the storage tank.

Cooler water flows back to the collectors to be heated again.

This cycle continues as long as sunlight is available.

Types of Solar Water Heaters

Active systems – Use pumps to circulate water.

Passive systems – Use natural convection (thermosiphon) without pumps.

Advantages

Uses renewable solar energy

Reduces electricity or gas bills

Environmentally friendly (low carbon emissions)

Long lifespan (often 15–20 years)

Disadvantages

Initial installation cost can be high

Performance depends on sunlight availability

May require backup heating during cloudy days

✅ In sunny regions (such as many parts of Africa), solar water heaters are very efficient and widely used for homes, hotels, hospitals, and schools.