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  • Solar-Hot-Water
    When there is little or no power usage during the day,
    solar water heating is the right way!
  • When Solar Thermal is Better than Solar PV?
    Solar Thermal is making a comeback. More KW per SQM!
  • Solar and Wetback

Solar Hot Water (Solar Thermal)

SOLAR HOT WATER – Why is it making a comeback ?

Solar PV is the good, but depending on your situation, Solar Thermal may be better for you and save you more money.

We sell PV Systems as well as Solar Thermal Systems,  so we are unbiased towards any one system. We want to help you get the best solution for your situation.

Get one of our consultants to compare Solar PV and Solar Thermal for YOUR SPECIFIC SITUATION.


 For most households water heating represents 30-45% of the power bill.

Solar Group is offering high quality Solar Thermal Systems. Some examples bellow. Contact us for more options.

There are  more Solahart panels installed in NZ , than any other solar panel! And there’s a Solahart for every situation.

Solar Termal System Solahart 181L
Panel + Tank + Valves
From $3,500
Complete Solution, Ideal for the Pacific Islands or for NZ small load households.
Titan Panel & Evacuated tubes
Add Solar Water Heating to your existing cylinder.
from $5,495 Fully Installed
Small to Medium load
Solahart Stainless Solar ThermoSOLAHART STAINLESS 
from $7,695
Large Load (up to 6 people)
Easy Wetback Ingratiation (kit)
wetback & solar
titan+greenglo Solar

The perfect combination with Greenglo Double coil cylinder
Large Load (up to 6 people)
Easy Wetback Ingratiation (kit)
wetback & solar
See more on Greenglo Website

*These are just a few examples. See our catalouge for more or use the ONLINE HOT WATER ANALYSIS



Switching to a Solahart is one of the best things you can do to reduce your energy consumption. Households, farms, businesses, industrial situations and even a bach can benefit.
And there’s a model to suit all, regardless of where you live. You’ll enjoy big savings on your energy bill and you’ll be helping the environment.
Solahart have manufactured quality solar water heaters since 1953
When buying a Solahart solar hot water system, you are joining hundreds of thousands of happy customers that are well looked after.

The Solahart solar hot water systems are durable and typically carry Energy Star performance for New Zealand climate. The only solar panel in NZ to do so!


Looking for Solar Edwards System?

solar-edwards is now Solahart Stainless

Solar Edwards has been re-branded and is now sold as Solahart Stainless. If you have a Solar Edwards system that needs service or parts – we have the parts and the know-how to service any solar Edwards system.




    The most popular models nationwide are the Solahart thermosyphon systems:
    Simple, robust with no moving parts

    Ask for a solar assessment to receive the best options for your dwelling and hot water needs.


    Our online FREE quotation system, will take you through a step-by-step process to select the most adequate solar system for your needs, your property and your climate zone.
    There are four hot water loads so the 1st step is identifying yours.
    Solar Group variety allows identifying the system to meet your needs and you budget.

    Small Load Medium Load Large Load Commercial Load
    1-3 People 4-5 People 6 People or More  Farm & Industrial

    Q: Do I have to have the tank on the roof?
    A: No. There are many options available. Tanks can be fitted in the roof, externally on the ground, or inside the home. It all depends upon the customer and property suitability.

    Q: What happens in the winter when the sun does not shine?
    A: The solar tank does have an electric element inside that turns on automatically.

    Q: Can I still use my existing hot water cylinder?
    A: You can, but depending upon the Solahart model it normally replaces the need for an existing hot water cylinder.

    Q: Can I run the hot water from my solar system into my existing cylinder because it’s nearly new?
    A: Yes but it is an inefficient way of using the solar system and not normally cost effective.

    Q: Do I need to strengthen my roof before we fit the Solahart?
    A: Depending upon the model and the roof type. An on-site inspection is best to establish this fact.

    Q: How much power will I save?
    A: According to EECA, water heating represents 30% to 50% of the energy bill. Your Solahart unit can save up to 75% of your current water heating costs.

    Q: Can I connect the solar unit to a wet back in my fire place?
    A: Yes. Both low pressure and mains pressure systems can be used with a wet back.

    Q: What is the payback-time on a solar system?
    A: A commonly asked question (even though you do not get a pay back on any other appliance you buy). It all depends how much water you use. A better way to look at it is if you invest the money you were to pay for a Solahart in the bank, you could easily expect double or even three times the return with your power bill savings than earned on the money invested.

    Q: Why should I buy a Solahart rather than a cheaper brand?
    A: Solahart likes to say; “all solar works”, Some better than others. Solahart is the only BRANZ tested solar unit available in NZ. We are established in over 80 countries worldwide and we have been manufacturing dedicated solar hot water systems for over 50 years. A certain peace of mind security with Solahart.

    Q: Do I need a permit or building consent for a Solahart?
    A: If you are building new, then consent should be part of your building permit when you submit your plans specifying a Solahart for approval. On existing homes we recommend getting a consent which we will assist with.

    Q: I have been told stainless steel cylinders are better because they don’t rust is this true?
    A: 95% of the high pressure hot water cylinders sold world wide are manufactured using ceramic technology . check with your local plumbing merchant. Ask a metallurgist, and you will find that stainless steel does rust. Few metals ever escape corrosion in water, no matter what their quality, Including Stainless Steel.

    All Solahart tanks have an internal double layer ceramic lining, fused to the steel casing at over 800oC a fact not lost on 95% of the world’s water heater manufacturers. Metals fused with ceramics have been used in some very extreme conditions such as the nose cones of NASA space shuttles.


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