Advice from professionals on incorporating eco friendly technologies into your builds and ideas into your life, as well as exclusive eco industry news from New Zealand and around the world.

Keyword Search
Home > Info > Energy > Solar Hot Water - How It Works & The Benefits

Solar Hot Water - How It Works & The Benefits

How a solar hot water system works:

A solar hot water system functions by using the suns energy to heat the water in your hot water cylinder. Typically, a system will provide you with up to 75% of your hot water needs. Gas or electricity is used to generate the last 25% of your hot water requirements.


  • Get a great return of investment within six to eight years. Each solar hot water system has a life expectancy of 20–25 years or more, so you can expect to have free hot water for around 15 years.
  • Reduce your energy bill.  A solar hot water system can reduce your hot water bill by up to 75 percent. If one third of your energy consumption is from your hot water use, you can save up to 25 percent of your total energy bill.
  • Avoid some of the rising costs of power. If trends continue, you can expect at least a 4-percent rise in power every year from now on.
  • Increase the value of your home. A solar hot water system is an asset to your home. If you sell your home with a solar hot water system installed, it will be a lot more valuable to potential buyers, they want to save money on energy bills too!
  • You reduce your reliance on power companies, as well as reducing demand on fossil fuels.

Why should you get Ecobob to help you find quotes for Solar Hot Water

  • A solar hot water system is a decent investment, which is why using Ecobobs three, free quotes makes sense. It is important to shop around for a solar hot water system and professional installer. Competitive prices, quality installers, trusted brands and products, it’s what Ecobob does best.
  • There are different types of solar hot water collectors.  Make sure you talk to the experts and allow them to determine what type is best suited for your home.

Get 3 Free Quotes for A Solar Hot Water System Here>

Comparing prices

System prices will likely be one of the main decisions to compare when receiving the three quotes. Make sure that other parts of the service are not being sacrificed for a lower price. Checking what installers will offer, in terms of value for money, is very important.

What to look for in a quote?

Once you receive your three quotes, check for these things:

  • Included components—e.g. solar collectors, tank, controller, and booster
  • Installation cost
  • Whether GST is included
  • Council consent fees (this will normally be a separate cost from that given by the installer, and you may need to pay it directly to your local council)

If these items aren’t included in the quote, make sure to go back to the installers to find out what the additional cost/s will be.

Is solar water heating a viable alternative to gas or electricity?

Yes, solar water heating is a better economic choice than gas or electricity. It is still a good idea to retrofit a solar hot water system, even if you already have an electric hot water system. If you already have an efficient hot water system, such as gas heating or a wetback, then a solar hot water system might not make a big enough impact to warrant a new installation.

What happens on a cloudy day?

Generally, the system will still be able to generate hot water—it just won’t produce as much. The controller will detect whether the system is able to heat the water or fluid to a minimum level. If not, the system will automatically switch over to your booster heater, which normally runs on either electricity or gas.

Using a tankless gas water heater is the most efficient backup for your solar hot water system, as the gas system is only turned on when hot water is being used. With an electric backup system, the hot water tank is heated as soon as the water temperature drops below a certain level unless the controller is set not to turn the booster heater on at that time.

Get 3 Free Quotes for A Solar Hot Water System Here>


You need to be signed in to post a comment.

If you have an account you can login here, if you haven't registered yet you can register here.