District heating

Oulun Seudun Sähkö

Savosolar delivered -once again- the largest solar thermal installation in Finland. This system is located way North in Tupos, Liminka - less than 200 km from the Arctic Circle.

The heating load of Tupos district heating is usually covered by wood pellets. Yet during summer time, the load is often so low, that the substantial wood pellet burner cannot be properly used and an oil burner got used, instead. The special challenge here has been to design a very efficient solar thermal system that could replace the oil consumption in summer to run the district heating network almost completely fossil-free.

Collector area

356 m²

Collector type

Savo 15 SG

Solar capacity

249 kW


Liminka, Finland

Installation year


Energy sources

Solar thermal, wood pellets, oil