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0412 359 786

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Wentworth Falls NSW 2782

Solar Hot Water

Solar hot water systems take advantage of Australia’s supply of sunshine and use solar energy to heat water for household use. A solar hot water system should provide between 50 and 90 per cent of your hot water needs.


How do solar hot water systems work?

Solar hot water systems heat your home’s water by utilising solar collectors, which can be evacuated tubes or solar panels, to capture solar energy. After that, the heated water is kept in an insulated tank until you need it. Usually found on your home’s roof, the solar collectors are best oriented towards the north.

Your hot water system can require a boost on overcast days or when hot water consumption is higher than normal. When the water temperature drops below the thermostat setting, the booster heating unit will activate, and it will shut off on its own when the water reaches the desired temperature. The greenhouse gas emissions from a gas booster are lower than those from an electric booster. 

It’s crucial to select a solar hot water system (also known as a solar water heater) that meets your demands because there are numerous varieties available. Ask your installer about frost protection for your solar hot water system if you live in a region that experiences frequent frost.

The benefits of solar hot water systems

Solar systems cost more to buy and install but the extra upfront cost will be recovered over the life of the system through reduced energy bills. Solar systems will recover their costs more quickly in larger households, in warmer parts of the country, or where there is plenty of access to sunlight. The benefits of solar hot water far outweigh the upfront cost: The difference in cost will be paid back as you’ll spend less on heating water. You will reduce the amount of greenhouse gases your home produces And of course another major benefit of solar systems is that they use a renewable energy resource.

What are Small-scale Technology Certificates (STCs)?

A rebate is offered to solar water heaters based on the amount of STCs they have, and the Australian Government identifies those that qualify for STCs. An STC is a calculation that shows how much energy, compared to the power consumption of an equivalent electric water heater, may be saved over a ten-year period when employing a solar water heater. One STC is equal to one MWh of electricity saved over a ten-year period, or 100 kWh annually.

Geographical location, solar radiation, sun angle, tank heat loss, cold water temperature, amount of hot water utilised, and hot water usage patterns are all taken into account in performance estimates.

It is simple to evaluate the solar savings between various models and brands; the greater the number of STC, the greater the energy savings. Choose same tank size, number of solar collectors, and booster type for exact system comparisons.

What are Small-scale Technology Certificates (STCs)?

By using the sun’s energy to heat water, you can save more than 60% on your annual hot water expenses for your home, which can save the average family between $420 and $880. Throughout the course of your system’s lifespan, this might save you thousands of dollars. In addition to lowering greenhouse gas emissions, solar hot water systems protect the environment and our natural resources.

In order to guarantee that you never run out of hot water, solar water heaters are typically fitted with electric or gas boosters.

Vital factors to take into account

To maximise the performance of your solar hot water system, ensure that:

  • You carefully read the warranty details;
  • Your roof’s structural strength is assessed (by the installer) to ensure that it can support the weight of the system;
  • Solar collectors will not be shaded by trees or nearby buildings;
  • Solar collectors will not be shaded by trees or nearby buildings;
  • The storage tank and solar collectors are as close together as possible to reduce the length of the connecting pipes (in constant pressure and pumped systems);
  • All pipes are well insulated;
  • Some form of frost protection is included, if required; and
  • All plumbing is carried out by a licensed plumber.

Tips for better performance

The most effective way to obtain maximum performance from your solar hot water system is to make efficient use

of hot water in your home. Things you can do include:

  • When possible, do jobs requiring hot water early in the day. This allows the water remaining in the tank to be reheated by the sun and reduces the auxiliary heating period.
  • Keep the booster thermostat at its recommended setting of 60°C. Remember, the lower the thermostat setting, the less energy used to supplement solar heating.
  • Install your system as close as possible to the kitchen, bathroom and laundry, which are the main hot water draw‑off points around the home. If this is not possible, install it close to the kitchen.
  • Conserve hot water by using it efficiently.
  • Fit a low flow showerhead. Showering accounts for over 30% of hot water usage in the home.  This can be dramatically reduced by fitting a low flow showerhead, or a flow restrictor to an existing showerhead.
  • Have the panels cleaned every 12 months;
  • Follow the manufacturer’s recommendations for the maintenance of your solar hot water system.