Solar water heating – efficient, cost-saving and simple to install

If you have a general knowledge of solar power and the advantages that is has over on-grid electrical supply, then you’ll already know the positive effect is has on the environment. There is also the small matter of the savings that you can make and the extra cash you can have in your pocket. One of the biggest cost saving solar systems, and most popular, is a solar water heating system.

In essence, solar water heating is simply heating water by the power of the sun. This is done through solar thermal collectors, which can come in flat plate or tubular form.

The collector traps the heat from the sun and then heats water which in turn is pumped through piping to the transfer that hot water to the point of usage.

This fluid is often water, though sometimes other fluids, such as anti-freeze, can be used.

The hot water is transported through a pipe system either by a pump, which is powered by electricity (an active system), or through convection, which is a more natural method that depends on pressure (a passive system).

The reasons for its popularity are simple: these systems tend to be uncomplicated and easy to maintain, and can account for up to 85% of hot water energy bills, depending on the region of the world you live in and the climate that you have. In most north European countries, the savings range between 15% and 25%, while in countries such as Israel and Cyprus, world-leaders in the industry, premium savings of 80% and over are common.

Solar water heating systems can be designed for both domestic and commercial use, with hotels, large guesthouses, spas and swimming pools served by larger systems. The technology can handle the demands of practically every requirement, from simply heating water to feeding under-floor heating systems and space heating systems. In the US, legislation has been introduced that sees as much 30% of the cost of solar water heating systems refunded through the tax system. In fact, the investment, which can range from $1,500 to $17,000 (depending on the system you buy) can be recouped within just 5 years.

Of course, you can’t have sunshine 24-7 and so it is normal to have an auxiliary power source in case the water heat falls below a set temperature. While a solar panel system generally stores enough power to heat water during the night (6 or 8 hours), an auxiliary power supply ensures that hot water is available through the day and night and regardless of weather conditions.

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