Solar panels in Skellefteå: power, savings and payback

How much power a roof in Skellefteå gives

We checked a normal house in Skellefteå.

The roof has a slope of 27.0° and faces south. The house has 20 panels of 420 W. That makes 8.40 kWp.

The roof gives 7 175 kWh a year. That is 854 kWh/kWp. With 10 panels you get 3 587 kWh. With 30 panels you get 10 762 kWh.

Skellefteå is in price zone SE2. The house buys power at the price in that zone.

Sun and snow in the north

In Skellefteå the sun is up for 21.6 hours on the longest day of summer.

On the shortest day of winter it is up for only 3.8 hours.

At noon in summer the sun is 48.8° above the horizon. In winter it is only 1.9° above the horizon. Then the panels give almost no power.

So most of the power comes from spring to autumn. In winter you buy almost all your power from the grid.

The snow load in Skellefteå is 3.0 kN/m². That is a lot of snow. The roof and the mounts must carry that weight.

Snow on the panels gives no power. This matters most in winter, when the sun is low. Then the panels give little power anyway. Ask your installer about mounts that suit snow in the north.

What you save and when it pays off

With 20 panels facing south, the house saves 6 779 kr a year.

The price is 131 945 kr. It takes 19.5 years before the system has paid for itself. Over 25 years the profit is 37 530 kr.

With 30 panels you save 8 876 kr a year. The price is 175 927 kr. It takes 19.8 years to pay for itself. Over 25 years the profit is 45 973 kr.

With 10 panels you save 4 089 kr a year. It takes 21.5 years to pay for itself. So a small roof gives a weaker result.

The prices in this article are after the green technology tax reduction.

South, east or west?

A roof facing south gives the most power.

A roof facing west with 20 panels gives 5 841 kWh a year. It saves 5 739 kr a year and pays for itself in 23 years.

A roof facing east gives the same amount of power. It saves 5 627 kr a year and pays for itself in 23.4 years.

A roof facing east gives power in the morning. A roof facing west gives power in the evening. So a roof facing east or west can also work. But it takes longer before it pays for itself.

Does a battery pay off?

With a 10 kWh battery, the house saves 1 415 kr more a year.

But the battery costs 54 820 kr. It takes 38.7 years before the battery has paid for itself.

A battery does not last that long. We count 10 years for the battery. So in our numbers the battery does not pay off in Skellefteå.

Skellefteå compared with Umeå

Umeå is 96 km away.

There the roof gives 881 kWh/kWp. The gap to Skellefteå is −27 kWh/kWp. So the roof in Skellefteå gives a little less power.

But the money still looks a little better in Skellefteå. The house saves 466 kr more a year. The gap in payback time is −1.4 years. Over 25 years the profit is 11 650 kr larger.

Check your own roof

The numbers here are for a typical house.

Your roof may face another way or have shade. Type in your address and we check your own roof in Skellefteå.

Questions and answers

The data

The data behind every number on the page, per month or year. Click a dotted number to open it.