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Your Guide to PV Solar Water Heating

Updated: Nov 1, 2023

Are you considering installing a solar water heating system in your New Zealand home or business? This guide, curated by the Green Heat team, is full of everything you need to know about solar water heaters, including how to operate and maintain them.

PV water heating
Solar water heating - Modern way

What is a PV Solar Water Heater?

PV solar water heating uses photovoltaic technology and a unique PTC AC/DC element to heat the water in the hot water cylinder (HWC). This differs from traditional thermal hot water systems where water is cycled from a collector through pipes to the HWC, either making use of a 220V Pump, 12V Pump or natural convection.

The PV solar method of water heating is considered highly efficient and environmentally friendly as it reduces the dependency on traditional sources of energy, such as gas or electricity.

Advantages of Installing a Solar Heating System

There are many advantages to installing a solar water heating system on your New Zealand property. Read about just some of them below.

Energy Efficient

Renewal Energy Source

Maintenance Made Easy

Easy Installation

No Pumps Necessary

Say Goodbye to Damaged Panels

Eliminates Overheating With Water Temperature Control

Modular System

Suitable For All Water Conditions

How Do They Work? Breaking Down the Basic Components

When trying to understand how PV solar water heating systems work, it’s best to break them down into their basic parts. Those parts are:

I. Photovoltaic cells and panel

II. Existing Storage tank with upgraded AC/DC dual element


IV. Controller

Photovoltaic Cells and Panel

The Hot Water System and Storage Tank


The Controller

Types of Solar Water Heaters in New Zealand

There are three main types of solar hot water systems available in NZ. They are:

1. PV Solar Water Heater

2. Active Solar Water Heaters

3. Passive Solar Water Heaters

How to Select the Correct Solar Water Heating System for Your Property

If you’re thinking about installing a solar water heating system on your property, the following considerations may help you narrow down your search.


Hot Water Usage


Strive Towards a Sustainable Future with Green Heat Solar Water Heaters

Using a PV solar water heating system is an excellent way of harnessing natural resources to meet your energy needs. These systems are cost-effective and efficient, promoting a greener and more sustainable environment. Contact our team to get your hands on our solar water heating products today!

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