What do you get for surplus power?
The power your solar panels don't use straight away is sold to the grid. But you don't get the same for it as you pay for power. Here is how the price is calculated, what it was from 25 July to 2 October 2026, and when it pays better to use the power yourself.
You get the selling price: the spot price minus small deductions for Energinet and your grid company and your buyer's trading fee. From 25 July to 2 October 2026, a kWh sold gave about DKK 0.36 in the middle of the day in DK1, while the same kWh cost about DKK 2.30 to buy from 17:00 to 21:00 with grid tariff, taxes and VAT. That is why power you use yourself or save for the evening is almost always worth more than power you sell.
How the selling price is calculated
The spot price minus a few small deductions. No grid tariff, no electricity tax and no VAT on the spot price.
- The spot price
- The price on the power exchange for the quarter hour you sell in.
- Energinet's deduction
- Feed-in tariff and balancing tariff for the power you send out to the grid.
- The grid company's deduction
- The grid company's own feed-in tariff.
- Trading fee
- What the buyer of your surplus power deducts for trading the power.
- VAT
- Added to the deductions, not to the spot price.
| Feed-in tariff and balancing tariff (Energinet) | DKK 0.010 |
|---|---|
| Feed-in tariff at the grid company | DKK 0.013 |
| Trading fee | DKK 0.008 |
| Deductions without VAT | DKK 0.031 |
| Deductions with VAT | DKK 0.039 |
With those rates, the selling price the spot price minus 3.9 øre per kWh. Your own depend on your grid company and your buyer.
You need a buyer
The power has to be sold to someone, and that isn't necessarily your electricity supplier.
To get paid for your surplus power, you need an agreement with a buyer. It's often the same company you buy power from, but it doesn't have to be. Most pay the spot price minus a deduction, and some pay a fixed price. If you have a fixed price, the calculation here doesn't apply.
In GridZeno, you choose your buyer under Grid company and electricity contract, or you enter the buyer's trading fee yourself. Without a buyer, GridZeno doesn't calculate any selling price.
The selling price, 25 July-2 October 2026
In the middle of the day, when the sun produces the most, the spot price is lowest.
- Around the clock, 25 July-2 October 2026
- DK1: DKK 0.99. DK2: DKK 1.00.
- 11:00 to 15:00, 25 July-2 October 2026
- DK1: DKK 0.40. DK2: DKK 0.42.
- 17:00 to 21:00, 25 July-2 October 2026
- DK1: DKK 1.37. DK2: DKK 1.39.
- Quarter hours with a selling price below zero, 25 July-2 October 2026
- DK1: 624 of 6,720. DK2: 548 of 6,720.
The average spot price per kWh without VAT from Energinet's data, 25 July to 2 October 2026. The selling price goes below zero when the spot price is below the deductions of 3.9 øre.
See the electricity price for the latest months.
So in the middle of the day, a kWh sold gave around DKK 0.36 in DK1 after deductions. In the evening, the spot price was more than three times as high, but by then most solar systems aren't selling anything.
Sell it or use it yourself
A kWh you use yourself is almost always worth more than one you sell.
| Spot price 11:00 to 15:00 | DKK 0.397 |
|---|---|
| Deductions with VAT | DKK −0.039 |
| You get for selling | DKK 0.358 |
| Spot price 17:00 to 21:00 | DKK 1.370 |
| Grid tariff, N1, peak load in summer | DKK 0.343 |
| Energinet's tariffs and electricity tax | DKK 0.123 |
| You pay for buying, with VAT | DKK 2.295 |
Average spot prices from 25 July to 2 October 2026, without the electricity supplier's fee. So the same kWh is worth around DKK 1.94 more in the evening in your own house than it's sold in the middle of the day.
That's why it pays to use the power while the sun is shining, and to store what you don't manage to use for the evening in a battery. And at negative prices , selling costs money, so it's better to let the panels produce less. Read about negative electricity prices.
How GridZeno helps
The plan knows the selling price for every quarter hour, the day before.
- The selling price for every quarter hour
- You see it the day before under Electricity prices, calculated with your buyer. All subscriptions.
- Stop selling at negative prices
- When the selling price falls below your limit, selling stops. Smart and Pro.
- Store the solar power
- The plan charges the battery with solar power when the power is worth more later. Smart and Pro.
- Sell from the battery
- When the evening price is high enough to pay for the loss and the wear. Pro.
It is the GridZeno Dongle at your inverter that stops selling and charges the battery. See what each subscription does.
See the selling price for every quarter hour in the demo.
The demo is the GridZeno app with a snapshot from our own system, with the prices for buying and selling quarter hour by quarter hour.