Solar Assisted Heat Pumps


130 Litres


200 Litres


300 Litres

Our range of solar assisted heat pump water heaters, will heat your water day and night in all weathers, all year round…

Harnessing Renewable Energy To Heat Water Efficiently - No Gas Required!

Do I need Solar Panels For It To Work?


No, is the short answer. However, we have now designed our Solar Assisted Heat Pumps to work even more efficiently with customers who have Solar PV installed. Very cost effective!

ThSolar Assisted Heat Pump (solar hot water system) can be best described as ‘a fridge in reverse’.

Most people understand that their fridge uses the principles of pressure, condensing and evaporation of a fluid in a closed circuit to remove heat and reduce the temperature inside the fridge. Reversing this principle by using an aluminium evaporator panel to absorb heat rather than reject heat, allows us to utilise the ambient air temperature day and night, all weathers and all year, to change the refrigerant liquid circulating through the panel from a liquid state to a gaseous state.

The aluminium evaporator panel shown above in a horizontal position, can also be fitted vertically. 

Read more below to discover how a solar assisted heat pump works.


How Does A Solar Assisted Heat Pump Work?


Our Solar Assisted Heat Pump manufacturing site in the UK, has more than 40 years of experience in the production and global supply of heat pumps.

As explained above, the refrigerant liquid circulating through the evaporator panel changes to a gaseous state.

The returning refrigerant, now heated and in a gaseous state is then compressed and heated further.

The compressed refrigerant is then passed through a heat exchanger where the heat is transferred to the water, heating it to 55°C.

Most installations only require one thermodynamic evaporator panel and can be installed on a wall as well as a roof, both horizontally and vertically and once installed doesn’t need to be cleaned, or re-filled to operate.

Typically our Retro-fit range is installed alongside your existing storage cylinder, within an 8 metre run of the panel. Click here for more information regarding a Retro-Fit Solar Assisted Heat Pump.

The installation of a Solar Assisted Heat Pump – be it a 130 litre, a 200litre or a 300 litre would replace the need for a storage cylinder.

The Solar Assisted Heat Pump Is Highly Efficient & Will Improve Your Home's Energy Usage, Leading To Lower Running Costs & CO2 Emissions.

Your Solar Assisted Heat Pump Will Link To Your Solar PV Inverter

During certain periods of the day, your system can utilise some of the productivity of the solar electricity to store the temperature of the water within the hot water cylinder to 60 degrees centigrade instead of up to 55 degrees centigrade,

This means that you’ll enjoy a larger volume of hot water when you need it by maximising the electricity generated from your solar PV array.

The installation is very straightforward with the connection of only one wire needing to be connected to the inverter.

It will not compromise your solar PV array.

Once it’s connected – fit and forget – The Solar PV Ready feature is automatic and will actuate accordingly.

USP of SAHP system

We All Need Solutions To Rising Energy Bills!

Are you aware that gas boilers will not be allowed in newly built homes from 2025? Renewable heating solutions like solar assisted heat pumps, air-source heat pumps, and ground-source heat pumps are the solutions of the future. It is therefore wise to install a solar assisted heat pump now to follow the tide, plus you will also enjoy several other benefits.


More Benefits Of A Solar Assisted Heat Pump...

* Solar Assisted Heat Pumps are an efficient and cost-effective way of heating your hot water. You could enjoy lower fuel bills, especially if you’re  replacing, Oil, LPG, or Electrical water heating.
* You can lower your homes carbon emissions, making your home more environmentally friendly and improving your homes EPC rating at the same time.
* Solar Assisted Heat Pumps have fewer moving parts than comparable systems for a more reliable and lower maintenance hot water heating system.
* In comparison to other Solar systems, Solar Assisted Heat Pumps utilise Heat Pump and Solar principles, meaning they work both day and night to heat your hot water whenever it’s needed.

Air Source Heat Pump versus Solar Assisted Heat Pump

Air Source Heat Pump

A Solar Assisted Heat Pump is a Split-Unit Air to Water Heat Pump, Water Heater.
They extract heat from the outside air very much in the same way that a fridge extracts heat from its inside.

In that way, they share the same refrigeration principles as other heat pumps, the closest heat pump relative being an Air Source Heat Pump, however…

Where an Air Source Heat Pump has:
* A rotary compressor
* An enclosed finned tube heat exchanger (evaporator)
* A large fan to convect air over the evaporator
* A plate heat exchanger (condenser)
* A motorised valve
* And a pump to circulate water through the plate heat exchanger.

Solar Assisted Heat Pump

A Solar Assisted Heat Pump has only:

 *A reciprocating compressor and an externally sited aluminium roll bond heat exchanger (evaporator)

In addition to extracting heat from the outside air, Solar Assisted Heat Pumps also receive efficiency uplifts from solar irradiance on the externally sited and exposed, large surface area of the aluminium roll bond heat exchanger panel when the UV rays are hitting it.

In summary, Solar Assisted Heat Pumps share the same basic principles of operation as an Air Source Heat Pump but they also utilise passive convection (wind) rather than forced convection, so they do not require fans, they heat the water directly, therefore do not require pumps, plate heat exchangers or motorised valves and so they have fewer moving parts, fewer maintenance actions, lower electrical consumption, lower noise levels AND they utilise solar irradiance.

If You Prefer To Watch Rather Than Read, Then These Two Short Videos Are For You!


Solar Assisted Heat Pumps are split unit air to water Heat Pumps and therefore require a time served refrigeration engineer to commission the connections between the Heat Pump body and the externally sited evaporator.

We have a lot of registered engineers who are capable of competently installing our systems.

 Although the evaporator panel can be installed almost anywhere, there is a maximum pipe run length of 15 meters permitted between the Heat Pump body and the externally sited evaporator.

Installation Costs & Planning Permission

Installation costs are site-specific.

As a guideline, Solar Assisted Heat Pumps typically require one day for installation by two time -served tradesman, a plumber and a refrigeration engineer.

They are all accredited installers. 

No planning permission is required.

Combining a Solar Assisted Heat Pump with existing and other renewable energy sources.

With a growing number of consumers now generating their own electricity from Solar PV our range of Solar Assisted Heat Pumps incorporate intelligent controllers that have the capacity to send and receive a digital signal from a PV inverter to be notified when an inverter may be generating or exporting electricity.

When the systems receive this notification they act as a battery, heating the water within the hot water cylinder to a higher temperature, thereby storing the generated electricity in the form of hot water, ready to be used by the consumer when they need it.

Furthermore, the Solar Assisted Heat Pump systems also incorporate a large surface area coil heat exchanger to facilitate connection to low flow temperature auxiliary heat sources such as air source heat pumps or solar thermal systems.


Solar Assisted Heat Pumps as the name suggests combines Heat Pump principles with Solar principles to provide a very practical, efficient and cost-effective way of heating your hot water.

They only have one moving component and require minimal maintenance. They are reliable, operate quietly and can reduce a household’s energy consumption, carbon emissions as well as the  fuel bill.

If you are looking to replace your hot water cylinder, or replace your hot water heating system, Solar Assisted Heat Pumps should be at the top of your list!

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