Types of solar hot water
Close-coupled systems have the tank mounted on the roof above the collectors. Split systems keep the tank on the ground and pump water up to the roof collectors. Collectors are either flat panels or evacuated tubes. Most systems have an electric or gas booster that tops up the heat when the sun isn't enough.
Solar hot water repairs: common faults
Faulty boosters, failed circulation pumps and controllers on split systems, leaking or cracked collectors, frost or tempering valve failures, and old roof tanks that have started to leak. We also check that the booster isn't running more than it needs to, which is a common cause of high power bills.
Solar hot water or a heat pump?
If your home already has rooftop solar panels, a heat pump running during the day often gives a similar result with no extra roof work. If you don't have panels, or your roof space is limited, solar hot water is still a strong choice. Our guide to choosing a system compares them.
Replacing a failed solar system?
If your solar system or its roof collectors have failed, we can remove them and switch you to electric or gas. See heat pump and solar replacement.
Common questions
How long does solar hot water last?
A well-maintained solar hot water system commonly lasts 15 to 20 years. Boosters, valves and pumps may need replacing during that time.
Why is my solar hot water bill so high?
Usually the booster is running more than it should, because of a faulty controller, a timer set wrong, shading on the collectors or a booster switched on permanently. We can check and adjust it.
Can you repair old Solahart and roof-mounted systems?
We service many older roof-mounted systems. Parts for some older models are no longer available, so we'll confirm before quoting a repair.
Sources and further reading
- Business Queensland: hot water systems (temperature control devices on new and replacement systems)
- QBCC: Form 4 notifiable work (installing, replacing or removing a water heater)
- Clean Energy Regulator: solar water heaters and air source heat pumps (STC eligibility)
- Residential Tenancies Authority: emergency and routine repairs
Solar hot water near you
We cover every suburb on the Sunshine Coast and in Noosa. Popular areas include: