No, unlike other competitor heat pump hot water (HPHW) systems, the Sanden Eco® HPHW system does not require an electric booster element

Yesfor efficient processing of warranty claims, should they arise, please register your Sanden Eco® Plus heat pump hot water system here.

Give PureElectric a call 1300 86 78 73 or send us an email and we'll be happy to assist you.

The Sanden Eco® Plus heat pump hot water (HPHW) system operates like a refrigerator in reverse. It contains a fan that forces air through an evaporator that contains a refrigerant. The heat in the ambient air passes through the evaporator (note: even air below 0 º C contains heat energy) and is absorbed by a natural refrigerant, R744 (aka CO2), which is ozone friendly and does not significantly contribute to global warming compared with most other refrigerants (older style refrigerants have thousands of times more global warming impact for the same amount of gas, when compared with CO2).

The warm gaseous refrigerant is circulated in the system via a compressor. As it passes through the compressor, its pressure rises, as does its temperature. This hot refrigerant then passes through a heat exchanger to heat the water, which is finally pumped to the storage tank.

How Heat Pump Hot Water Systems Work

Why does the Sanden use CO2 as its working gas, what is the benefit?

  • There is far less environmental impact (i.e. No ozone layer depletion and minimal global warming) than other commonly used refrigerants, should the system leak. 
  • There is a much higher efficiency, thereby allowing more heat to be transferred to the water, for less energy used (i.e. Excellent  thermodynamic ability).

Isn't CO2 a greenhouse gas and therefor bad for the environment?

While it is true that Carbon Dioxide (CO2) is a greenhouse gas it has a Global Warming Potential (GWP) of 1. Whereas refrigerant gases in other heat pumps can have GWP of over 10,000, which means if they leak to the atmosphere they contribute 10,000 times more to global warming compared with the refrigerant gases used in a Sanden Eco Plus. 

The table below shows the GWP for some common refrigerant gases (note: GWP must include a time interval over which the greenhouse gases act, in this case 100 years)

Environmentally Safe CO2 in Sanden Hot Water Heat Pumps


Our system utilizes less than 1 kg of R744 (CO2) as a refrigerant contained in a closed system at the factory.  The installer does not need to charge the heat pump on site.


There are many benefits in installing a solar PV system including:

  • Reduce or eliminate your power bill - you can regain control of your electricity costs. 
  • A revenue generating asset - you make back many times the initial cost of the system over the lifetime of your solar PV system.
  • Add value to your home - a solar system adds value to your home increasing the resale value. 
  • Reduce your carbon footprint - a solar system generates no greenhouse gases while in operation giving you zero carbon power and lowing your overall carbon footprint. 

Solar rebates come in three forms:

  1. Federal rebates:  i.e. Small-scale Technology Certificates (STC) which are available in all states. 
  2. State based rebates:  Available in some states from time to time and may be means tested (you can email for more details).
  3. Feed in tariffs:  Different tariffs are offered by different retailers. 


Small-Scale Technology Certificate (STC) rebate

Currently, all solar systems are eligible for an STC rebate which is calculated using four factors.

Factor 1: The total size of your system in kW

i.e. you have a 10 kW of panels and an 8.2 kW inverter your system size is considered 10 kW

Factor 2:  The Zone you are in

Australia is divided into four solar zones. 


Solar zone rating

Source: Solargain

Zone Rating
1 1.622
2 1.536
3 1.382
4 1.185

To find out which zone your postcode is in click this link


Factor 3: The STC multiplier based on the year in which you install your solar system

The STC multiplier is a factor worked out based on what year you install your solar system and is as follows:

Rebate phasing out schedule

Source: Solargain

Factor 4: The price of STCs

STCs can be priced through the Government's STC clearing house or on the open market at places like Green Energy Markets


As an example say that you are installing 10 kW of panels, in Zone 1 in 2020 and the current price of an STC is $35 your STC rebate would then be:

STC rebate =  10 x 1.622 x 11 x 35 = $6,244.70

This would appear as a $6,244.70 discount off the total cost of your solar system. 


State specific rebates and Feed in Tariffs (FiT)

If you want to find out the currently available up-front rebates or Feed in Tarrifs (i.e. the amount you are paid for feeding power back into the grid) you can always email us at for more details.

The following is a list of state government entities that manage state based solar incentive schemes: 




If your house is single phase power, the amount of rooftop solar PV that you can install will depend  on your electricity network provider, as each electricity network provider has different rules.

In almost all instances, you can install more inverter capacity than what the electricity network provider says, so long as you grid export limit your solar PV system.  Note:  Not all inverters have grid export limit capability. 

Below is a table showing the allowed capacity (inverter capacity and your grid export limit), for each of the electricity network providers for single phase households:

SA Power Networks (SA) max 10kW inverter capacity, 5kW export limit
Powercor (VIC) no inverter limit, 5kW export limit
CitiPower (VIC) no inverter limit, 5kW export limit
Ausnet Services (VIC) max 10kW inverter capacity, 5kW export limit
United Energy (VIC) max 10kW inverter capacity, 10kW export limit
Jemena (VIC)  max 10kW inverter capacity, 10kW export limit
Energex (QLD) max 10kW inverter capacity, 5kW export limit
Ausgrid (NSW) max 10kW inverter capacity, 10kW export limit
EVO Energy (ACT) max 10kW inverter capacity, 5kW export limit

Yes it certainly is. Each panel type typically gets a 25 year performance warranty and at least a 10 year manufacturing warranty, depending on the panel chosen. Jinko panels offer a 10 year manufacturing warranty, QCells panels 12 years, and SunPower panels offer a 25 year manufacturing warranty (parts and labour).

Check out your panel and inverter warranty sheets for more details!

Generally, most mechanical defects will be covered during the warranty period, as long as they are deemed a manufacturing fault. Most suppliers also guarantee 80% power production for the first 25 years of your solar power system’s life.

It is important to understand that warranty terms and conditions vary from supplier to supplier.