Solar cylinder

Why not opt for a proven cylinder solution for detached and two-family houses?

Do you want to provide your family with a reliable supply of sufficient hot water at any time, whilst also making the most of the free energy from your solar thermal system?
With the SEM-2 solar cylinder, you can do both. It offers you a high level of DHW convenience, particularly when large amounts of water are required at the same time.
The water inside the cylinder is heated by two internal indirect coils. This means it can either utilise the heat from your solar thermal system or work with energy from your boiler. The sun provides enough energy during the warmer months for your heat generator to remain off, so bringing down your heating bills.

  • Specification

The proven cylinder solution for detached and two-family houses

The SEM-2 solar cylinder offers you and your family a high level of DHW convenience. Particularly when large amounts of water are required all at the same time. It is suitable for detached and two-family houses, and is available with a capacity of 300 or 400 litres.

  • High quality thermal insulation – the cylinder is still warm even after several days without sun
  • Highly durable – the inner walls and the cylinder's two internal indirect coils are protected against corrosion with a two-layer enamel coating and a protective anode
  • Short heat-up times and a high DHW output thanks to the large heat transfer area
  • Space saving – your solar pump assembly can be mounted directly on the cylinder and therefore does not take up any additional space in the boiler room.
  • The SEM-2 is available with a cylinder capacity of 300 or 400 l 

technical drawing
Model / Performance
  • SEM-2-300
  • SEM-2-400
Please choose model
Solar cylinder SEM-2
Model type SEM-2-300SEM-2-400

Size / weight

Diameter incl. thermal insulation (mm) 600701
Height incl. thermal insulation (mm) 17941651
Total weight - empty (kg) 130159

Cylinder systems

DHW cylinders --
Dual mode DHW cylinders xx
Heating water buffer cylinders --
Heating water buffer cylinders with integral DHW heating --
Freshwater modules --

Combination with

Heat pump --
Solar xx

DHW heating

DHW output (l/Min)--
Cylinder size (equivalent)285385
DHW capacity (l.)--
Standby heat loss (kWh/24h) 1,922,41


Suitable for DHW heating xx
Suitable for central heating --
Suitable for solar thermal xx
Suitable for heat pump --
DHW heating with instantaneous water heating principle (integral hygiene function) --


With the SEM-2 solar cylinder, you are opting for an efficient and durable product that utilises free solar energy.

It's great when everything runs smoothly. In the morning, for example, when the whole family is getting ready for the day ahead and needs lots of hot water. The SEM-2 solar cylinder copes with ease. You will never get a cold water shock, because there is always enough hot water for you and your family. And the system has a positive impact on your fuel expenditure too, because the sun, as we know, won’t be sending a bill. Do you need an even larger cylinder – perhaps for an apartment block? Then the WOLF SEM-1 solar cylinder is the perfect choice for you.

Whether you're looking at heating, ventilation or cooling

Whether you're looking at heating, ventilation or cooling – at WOLF we are only satisfied when all these elements come together to provide you with an indoor environment where you can truly relax. We want technology to fit around you, not the other way round.
And because your requirements may change over time, we offer you full control of your heating system, DHW temperature and air change rates with our user friendly devices, intuitive apps, and SmartHome enabled programming units –so your living zone is also your comfort zone.


With minimum standby consumption, energy saving pump control and an intelligent control unit, you can save energy and protect the environment. Find out here about our BLUE STREAM® efficiency technology.

Find out more


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