Snøhetta has just completed an office building in Trondheim that produces more than double the amount of electricity that it consumes. If you recall my recent post on Norway's new coastal highway, you may remember that Trondheim is the northern terminus of highway E39. I mention this because of access to sun. Latitude 63.43.

The office building is about 18,000 square meters and it is wrapped with about 3,000 square meters of solar panels. The roof is angled at 19 degrees in order to maximize sun harvesting, and any excess electricity is fed back into the city's grid / neighboring facilities. Large batteries also help to help carry the building through the winter months (again, latitude 63.43).

Here are a few photos of the roof (via Dezeen):

I wish I had more of the details so that I could see how the numbers pencil. Hard costs, utility costs, office rents, government incentives/disincentives, embodied energy in the batteries, and so on. Because this looks like an extraordinary accomplishment for a city that is remarkably north.

Images: Dezeen