Vatajankosken Sähkö Oy

Location: Kankaanpää, Finland

  • Panels are visible on the roof above main entrance at Vatajankosken Sähkö.
  • SolarWorld Sunmodule Plus SW 250 poly, 250 watt multicrystalline panels in row.
  • SunTub-mounting system and stay plates as counterweights.
  • Panels mounted.
  • Sunny Tripower STP 5000TL-20 5kW inverter is installed inside technical room. Cables from panels come in through the wall to the inverter and grid power goes through safety switch in to the electric box.


On the roof of Vatajankosken Sähkö  office building is a 4.5 kWp photovoltaic system. Produced electricity is used to run ventilation and other systems of the building. The photovoltaic system is also a showcase for PV systems that the company sells.

PV system consists of 18 multicrystalline panels (250W each) that are connected in series, 5kW SMA three-phase inverter and SunTub flat roof mounting system. Panels are mounted on the roof towards South South-East inclination 28°. Inverter is located in a technical room behind the panels.

Panels are mounted on to UV-resistant HDPE-plastic fixtures that have a fixed 28° angle. Fixtures are held on place by counterweights which in this case are approx. 3000 kg of concrete stay plates.  Panels are on the edge of the roof so they are visible from the ground.

System was commissioned in the end of September 2013. You can follow the production numbers from Sunny Portal.