This graph shows production of electricity on the day 9. 2. 2012 at 11:30.
Legend:

• INV 1 – INV 11 … modules mounted on the roof
• INV 121 – INV 41 … modules mounted on trackers

Access to the tracker, despite snow, is possible. Because of that we can clean them and the production can run smoothly. The trackers take advantage of the winter sun…

The roof is in the winter covered with snow and so the production is stopped.e…