The ROTEX HeatPumpSolarUnit is made up of an external device, an internal device and a heat storage tank.

The external device

The external device takes heat from the ambient air which is absorbed by the heating medium (refrigerant) and is transferred to the internal device.
The compact external device can be placed unobtrusively outside new buildings or older residential buildings.

The internal device

The internal device inside the house transfers the heat stored in the heating medium (refrigerant) to the heating and warm water system. The internal device can be installed with the heat storage tank in any suitable place. You will not need a special plant room.
Apart from that, no expensive digging and excavation work is necessary.  Your garden remains completely untouched.

Easy control

The digital control in the internal device is particularly easy to use. You can use it to control the heating system and (if present) the cooling system to meet your needs.

The hot water temperature is regulated depending on the outside temperature. The control itself automatically identifies winter and summer and switches the heating on or off as required.


With the integrated digital time switch, individually adjustable daily and weekly programmes are available for every application. This way the temperature is automatically lowered during the night or while you are on holiday and when you get up in the morning or return from your holiday, it is pleasantly warm again.

By keeping the water temperature as low as possible, the system reaches maximum efficiency. With a convenient remote control, you can even control the heat pump from your living room.

Hot water and solar storage tank

The heart of the HPSU system is the heat storage tank which stores the heat obtained and then transfers it to the heating system at the required time. We developed the HybridCube^® especially for the HPSU.

The ROTEX HybridCube^® is a corrosion-free, plastic hot water storage tank with stainless steel corrugated pipe heat exchanger which conducts the heat obtained particularly well. It is a combination of a hot water storage tank and a flow water heater with outstanding water hygiene properties for you and your family.

Our experience – for your health

Because of the way it is designed, the principle of the ROTEX HybridCube^® is optimal from a water hygiene point of view.For 25 years now, ROTEX has been building hot water storage tanks according to this principle for the best possible water hygiene. With all storage generations the construction has been selected so that the heated domestic water only stays in the storage tank for a very short period of time.
This prevents any deposits (limescale, sludge or rust) being formed in the domestic water. This means the HybridCube^® is absolutely maintenance-free and does not provide a breeding ground for germs.

The outstanding water hygiene advantages of this type of hot water storage tank were confirmed by extensive research carried out by the hygiene institute of Tübingen university.

The sun is our natural supplier of energy. Make use of this free heat supply for your house.

If you use ambient energy from the air and sunlight to heat your home, then this heat supply is free of charge and, at the same time, inexhaustible.

Two that belong together: Heat pump + Solar energy

Little effort – great benefits

At its peak, 80% of solar energy can be converted into usable heat.
The fantastically high degree of efficacy of the ROTEX flat solar panels is what makes this possible.

Solar energy and heat pump complement each other here in an ideal way.
Depending on need, the heat pump feeds the necessary quantity of heat into the heating system.

The measure of things: The annual seasonal coefficient of performance

It describes how many times more throughout the year you obtain heat energy relative to the auxiliary energy used.

The higher the efficiency rating, the greater the efficiency of the heat pump.
In connection with our solar plant, the ROTEX heat pump reaches an annual seasonal coefficient of performance of up to 4. This means that you get 4 times more heat energy for heating and hot water than the auxiliary energy you are using. The ROTEX HPSU sets completely new standards in the area of air/water heat pumps.

Practically unbeatable: Heat pump + Solar energy!

In the case shown the energy proportions are divided up as follows:

Solar energy approx.: 20%
Heat pump approx. 55%
Auxiliary energy approx. 25%




yellow: Solar energy
green: Heat Pump
blue: Auxiliary energy

The annual seasonal coefficient of performance according to this example is therefore: SCOP = 4.0 (SCOP = Seasonal Coefficient of Performance)

Direct use of solar energy simply included

The ROTEX HybridCube® heat storage tank is already ideally equipped for using solar energy.
If you only want to decide to acquire a solar plant later on, then it is quick and easy to install it at a later date.

In the heat pump, the role played by the engine in a motor car is played by the compressor. This essentially determines the energy efficiency of the entire heat pump. ROTEX belongs to a worldwide leading company in climate and heat pump technology. The compressors of the ROTEX heat pumps are developed and manufactured within the group of companies. This is how we can rely on the know-how from several million compressors from the technological leader.
They have been designed precisely for this application and have been optimised from an energy point of view.

The HPSU heat pump can not only provide heating but, as an option, can also cool. The underfloor heating system is designed to be both a heating and also a cooling surface. With this system, you can keep the temperature in your house comfortable all year round.