The advantages of evacuated tube solar hot water systems in Canberra and Queanbeyan
- They are the most efficient of all solar hot water systems when installed correctly.
- They are available in both electric and gas boosted models and various tank sizes.
- On some models it is possible to increase the efficiency well beyond the factory settings.
- A north facing roof is not necessary. However, the collectors tubes should and can be pitched so they face north.
- When operating as a solar hot water system they draw 20 -30 Watts of power compared to electric hot water systems that draw 3600 Watts of power.
- If installed properly, they are less prone to freezing when compared to similar flat panelled solar hot water systems.
- When evacuated tubes break, which is quite rare, the tubes are cheap to replace when compared to flat panels. See how to repair a broken evacuated tube
- They do not make a noise like heat pumps do when the solar hot water system is on.
- Most brands are very reliable and work efficiently in the Canberra climate, if installed properly.
- They attract a higher STC rebate ( solar hot water rebates) than many other solar hot water systems because of their efficiency.
- Some evacuated tube brands make solar ready electric hot water systems. This means you do not have to outlay for a complete solar hot water system when your old electric hot water system fails. If you complete the full installation within 6 months you get the full STC solar hot water rebate. This could be more than $1000.00
The disadvantages of evacuated tube solar hot water systems in Canberra and Queanbeyan
- They are more expensive to have supplied and installed than most other types of solar hot water.
- Evacuated tube, solar hot water systems require more maintenance than the less efficient glycol filled tank on roof flat panel systems.
- Many plumbers advertise that they can work on solar hot water systems. However, finding experienced installers that are plumbers, gas fitters and have restricted electrical qualifications and adequate solar hot water experience in Canberra is difficult.
- Evacuated tubes overheat too easily when installed flat against roofs, when the circulation in the system is too slow or if the system is oversized.
- There are too many budget systems and fly by night installers that keep popping up. Whilst they do not last long in business, sourcing solar hot water spare parts for these systems may be increasingly difficult.