The most household energy created comes from our hot water usage, so it makes sense that we would try and use the sun to solar heat our water. Aside from roof tanks and heat pumps there are two main solar water heating systems- flat plate collectors and evacuated tube collectors.

Both of these operate in the same way- liquid is circulated through solar collectors which absorb heat from the suns radiation. The circulated liquid is passed through the coils of the hot water storage cylinder and heats the water, which can then be supplied directly or heated further by another boiler.

Costs-
The costs for solar water heating systems will differ and can cost between $5,000 and $10,000 depending on the type and size of the system. A normal flat plat installation is a 3m2 and 4m2 solar panel and a 200 litre storage tank (this can differ depending on the amount of hot water used). The evacuated tubes take up around half of the roof space. DIY systems can be purchased for $3,000 and under.

Grants-
Currently, there is a Federal rebate under the Energy Efficient package until June 30. There are also state rebates and RECs can be also taken into account. Unlike the solar panel electricity there is no means-testing for the grant.

Savings-
An everyday solar heating water system can give you up to three quarters of your hot water requirements. This will reduce the amount of carbon dioxide emissions and also reduce fuel costs in your home. The savings will be dependant on the weather system and type.

Maintenance-
Solar hot water panels don’t need much maintenance and will only need a yearly check by the homeowner. During their lifespan these panels will only need a detailed check by a professional every three to five years.

Who is it for?
To get a solar heating system all you need is a only a few metres of north facing roof and direct sunlight for most of the day. To have a solar water heating system you will need to keep a spare water cylinder.

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