Two ways to read the same honest numbers. Pick the one you prefer — you can’t get it wrong, and everything after this adapts.
Choose your customer type so we show the right batteries and tariffs.
Upload your consumption export from eloverblik.dk. We model a battery against your real load and real Danish grid-market prices — and show you an honest range, not a single flattering number.
.xlsx or .csv — the consumption (forbrug) export
Auto-detects your grid company & address, so you don’t pick anything
Use the realistic number. The optimistic and conservative cases are the edges; under “See how we calculated it” you'll find the narrower band where 8 out of 10 years land.
Click any battery to see its full picture above. These are standard products (C&I cabinets of 100 kW / 215 kWh, 5 MWh containers) — or enter your supplier’s spec and quote. “Our pick” is the battery with the best median lifetime value after its price and running costs, among those that fit your grid connection; bigger ones are modelled with an upgraded connection so you can see what an upgrade would be worth. aFRR needs 4 hours of energy behind every MW offered (Energinet’s rule), so a 4-hour battery can offer its full power and a 2-hour battery about half. Values shown for the selected case.
Each step is what the battery earns if you stop there: only covering your own consumption, then also selling to the day-ahead market, then also offering reserves through a partner. Each step includes the one before it. Only the last step depends on how many reserve bids are won, so only it moves with the case.
Each run draws a fresh set of reserve win rates and reshuffles the year’s days, then re-prices the whole battery. The spread is win-rate uncertainty — reserve auctions clear before you know if you won — not price guessing; day-ahead prices are already settled.
Why this band is narrower than the optimistic–conservative cases at the top: each case assumes every market goes well (or badly) all year at once. In the simulations luck varies market by market and day by day, so good and bad draws partly cancel. Plan on the realistic case; the cases show the edges, the band shows where most years land.
Pick a standard size or enter your installer’s spec. The values follow your answer to “How will you use the battery?” at the top. “Our pick” is the size with the best lifetime value after its price and running costs. Brand names are examples of a size — the price shown is indicative for the size, not that brand’s quote.