Tuesday, August 29, 2017


Article from Energy Supply Heating-as-a-Service

Suntherm replaces oil heating systems in a smaller village with a new HaaS – Heating as a Service - solution

Funds from the EU’s Horizon 2020-programme have landed well with the company Suntherm in Højslev close to Skive in the mid-western part of Jutland, Denmark.

This is how it works:

‘We can store 25 kWh in melted salt and store it for several days. When the electricity grid has a surplus, we start the heat pump and store the heat to be released during the night’, Morten Veis Donnerup explains.

Furthermore, with assistance from the weather forecast and the electricity prices, Suntherm can control the heat pump in order that it produces most intelligently.   

The 1,1 million Euros – equivalent to 8 million Danish Kroner – will assist in lifting the company’s product, a heating solution based on solar panels, a heat pump, and a salt solution functioning as a heat battery, to commercialization and a final roll-out of the system “Suntherm SmartHeat” during 2019.

This is explained by Morten Veis Dunnerup, one of the developers behind the system and CEO of Suntherm.

‘We are aiming at developing from being a small company testing demonstration models to having a commercial product ready for the market’, he explains to Energy Supply.

However, before reaching this goal, commercialization and a large sales tour, more testing is needed.

Have tasted their own medicine

Since January, Suntherm has tested two demonstration systems – one at a family household in the vicinity and the other, well, yes, in Suntherm’s own buildings.

The two systems have been running since January. ‘One system is within our own buildings, so we have tasted our own medicine’, Morten Veis Donnerup explains. He is quite happy with the results of the tests that finished before summer vacation time.

‘We have chosen to close down the two systems in order to change their construction a bit. We have learned very much, indeed, from our systems. Good things, but also things that have made it necessary to upgrade the design’, Morten Veis Donnerup reports.

More specifically, the systems should be tuned to start up somewhat faster after having been on stand still for a longer period of time. But this is exactly the kind of experience that comes with real life testing.

‘When you test real systems with real people, real things that are not always foreseeable at the drawing board happen’, Morten Veis Donnerup explains.

It takes a village

After fine tuning and regulation of the design of the systems, a far larger test environment awaits, namely the village of Hvidbjerg close to Skive.

‘We are offering that 35 households in the village participate in our tests. In the first round, we will elect the 10 most suited house holds which will have a heating system installed before the heating season starts. Next year, we will offer our heat solution to another 25 households’, Morten Veis Donnerup tells and he continues:

‘It will work in the same way as a cooperative. Participating households will form an association that will then own the installed heating systems. The advantage being that they get cheap heating – with a small initial investment and a low heating bill’.

From Denmark to Germany

The money from the Horizon 2020-projekt is aimed at continuing product development in order that it matches the larger export markets. The reason for aiming at export markets and not only the market within Denmark is quite special.

‘Denmark is a special country – we are already good at green energy and quite conscious about how we use energy. This is why the potential for our product on the home market is not extremely big, but Denmark is an obvious country for testing’.

‘When we have tested our product in Denmark and have shown that it works, this will make it easier to open the doors into the German market’.


The above is a non-official translation from the Danish text – to see the original article click here