Frequently Asked Questions

Q. Can a Sky Power solar system provide hot water on cloudy cold days?
A. Yes, but output may be reduced this is why a back-up energy source is required

Q. What volume of hot water can a Sky Power solar system supply on a good sunny day?
A. This depends on the solar panel placement on the roof. Ideally a north facing system will provide as much hot water as you need as long as it has been sized properly. For example - a solar tube will provide 7.5 litres of hot water per six hour sunny day at between 50oC and 70oC.

Q. Can a Sky Power solar system provide me with all my hot water needs?
A. The solar system will not supply all your needs, but a correctly sized system will meet most of your hot water demands. It is important that a gas or electric back-up energy source be available for the days when solar collection is impeded by inclement weather.

Q. Do Sky Power solar panels installed on the roof detract from the appearance of my house?
A. No. From a distance a solar panel looks similar to a sky-light.

Q. Will my Sky Power solar panel freeze up in the winter?
A. No. The solar controllers monitor the temperature and activate the pump to inject warm water to stop freezing. In severe conditions a glycol water mix via a heat exchanger may be necessary.

Q. What is my pay back on a Sky Power solar panel system?
A. If you have a 225 litre hot water cylinder and approximately $100 per month in electricity charges it would take 36 months to recoup the cost of the system.

Q. Will the Sky Power solar panel tubes withstand hail storms?
A. Yes it will withstand hailstones up to 25mm in diameter.

Q. What applications can a Sky Power solar water system be used for?
A. Domestic hot water, swimming pool heating and supplementing underfloor heating.

Q. Is a Sky Power evacuated tube solar panel more efficient than a flat plate collector?
A. Yes. There are many ways they are superior to flat plate systems.
1. The cylindrical shape of the evacuated tubes ensure maximum solar Collection from mid-morning to mid-afternoon as the sun is perpendicular to the glass tube during that period.
2. An evacuated tube system has the advantage of producing more hot water because of the better solar collection efficiencies.
3. Evacuated solar tubes will work in overcast conditions although the collection input is reduced and it may require a boost from an alternative energy source.
4. Evacuated solar tubes have greatly reduced convective and conductive heat losses over flat plate systems.

Q. What maintenance does a Sky Power solar system require?
A. Under normal conditions none, but if the solar collectors become dusty they may need washing down.

Q. Where can I purchase a Sky Power solar system?
A. By calling Sky Power 0800 759 769. We have qualified installers throughout New Zealand.