Pillar guide
Ancillary services: how Energinet pays for grid balance
What FCR-D, FCR, aFRR, mFRR and FFR are, how Energinet buys them in daily auctions, and how ordinary households join in through aggregation in a virtual power plant.
Read moreKnowledge
The power grid must stay in balance at 50 Hz at every moment — and Energinet pays for the flexibility that keeps it there. Here we explain how that works, in plain language and without sales talk. Start with the two pillar guides below, or jump straight to what your home can earn and the FAQ.
Start with the two pillar guides
Pillar guide
Grid balancing: why the grid must stay at exactly 50 Hz
Why the power grid must stay at 50 Hz, what happens when production and consumption drift apart, and why household flexibility matters more every year.
Read moreAll articles
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Batteries for ancillary services: how batteries earn on reserves
Batteries are the grid's fastest reserve, and Energinet pays for them through daily auctions. See how home batteries and large plants earn from it.
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Battery for solar panels: retrofit, price and earnings
Can you retrofit a battery to your solar panels, what does it cost, and what can it earn? An overview — and how it can work for the grid at the same time.
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A battery in a home without solar — can it actually pay off?
A home battery can earn money without solar panels: it charges when power is cheap and sells its response capability to Energinet. Here is how the numbers work.
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Electricity prices tomorrow: when they arrive and what sets them
Tomorrow's electricity prices are published in the early afternoon, once the Nord Pool day-ahead auction has cleared. See when, why — and where to find them.
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Grid balancing for households: earn from your home's flexibility
Private households can now take part in grid balancing: your heat pump, water heater or home battery sells flexibility to Energinet — and you share the revenue.
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How much electricity does a heat pump use, and what drives it?
A heat pump's electricity consumption depends on the house's heat demand, the efficiency and the weather. See what drives it — and how it can become income.
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Negative electricity prices: why power can cost less than zero
Negative electricity prices occur when more power is produced than anyone can use — typically on windy, sunny days. See why, and what it means for you.
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Immersion heater and hot water tank: from cost to income
The immersion heater and electric water heater are among a home's most flexible devices: the water stores heat, so consumption can shift — and sell as reserves.
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BSP, BRP and eSett: energy market abbreviations explained
The BSP delivers balancing to Energinet, the BRP carries balance responsibility, and eSett settles across the Nordics. Learn the roles — and where NM1 sits.
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Electricity prices hour by hour: how to read and use them
Danish electricity prices are set on Nord Pool for every hour of the day and swing with wind, sun and demand. Learn to read them — and shift your consumption.
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Heat pump, water heater or battery: which suits flexibility best?
Heat pumps, electric water heaters and home batteries can all deliver grid flexibility. Compare reaction time, comfort and installation — and find your device.
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Home battery: price, subsidies and earnings explained
What does a home battery cost, how long does it last, and how can it generate income? The three income legs — including ancillary services for Energinet.