Knowledge baseMarket prices

the cheapest hours are most hours

Day-ahead prices change every quarter of an hour and are known up to 35 hours ahead. A car parked for the night, a heat pump or a battery does not care which hours it uses: it can take the cheapest. Below: today's prices, live.

Last reviewed: 4 November 2026

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a day cheaper than the cheapest fixed tariff: 14.5 h; a day cheaper than the cheapest fixed tariff
of days with 6 or more cheaper hours: 90%; of days with 6 or more cheaper hours
at 11 kW: what a car needs a day: 40 min; at 11 kW: what a car needs a day

Live

Far more cheap hours than a car needs

Bright green: the 4 cheapest hours of each day. Light green: the other hours cheaper than the cheapest fixed tariff in Luxembourg. At 11 kW a car needs less than one of them a day. Switch to 7 days, 30 days or 12 months to see how reliably they come.

Day-ahead price, Luxembourg and Germany (DE-LU)

—Loading the latest prices…

the 4 cheapest hours of each dayother hours below the fixed tariffabove itCheapest fixed tariff, energy only: 10.90 ct/kWh

Live data: Bundesnetzagentur | SMARD.de via Fraunhofer ISE Energy-Charts (CC BY 4.0). Wholesale day-ahead prices before grid fees, taxes and VAT.

1 January 2025 to 30 September 2026

15,311 hours of day-ahead prices

9,222

hours below 10.90 ct/kWh

60% of all hours

1,047

hours with a negative price

wholesale, before grid fees and taxes

3.66 ct

average of the 3 cheapest hours

−66% against 10.90 ct/kWh

−20%

a fixed night window only

18:00–07:00; solar now makes midday cheapest

Method

How we compared

Raw EPEX SPOT day-ahead prices for the DE-LU zone (data Bundesnetzagentur / SMARD via Fraunhofer ISE Energy-Charts, CC BY 4.0; quarter-hour prices since October 2025 averaged per hour) against the energy component of the cheapest fixed tariff in Luxembourg, Enovos FIX naturstroum home at 10.90 ct/kWh excl. VAT (switchr.lu, April 2026). Both before grid fees, taxes and our margin.

Using the 2026 fixed price for the whole period is conservative: the same tariff was 15.73 ct/kWh in 2025. 90% of days had at least six cheaper hours; winter 2025 had 26 days with none, so we do not say every day.

Per year

What it means for one car

Our 2023 sample (a VW ID.4-type car, 15,000 km, 11 kW, charging in the three cheapest hours each day on a separate meter) came to €128 a year against €435 with the cheapest fixed tariff: −71%. Our 2024 analysis gave 57 to 65%. The honest range is 50 to 90%, depending on behaviour and the year.

In a residence with Concept #3 residents choose: Cheapest energy at €0.29/kWh incl. VAT, or Charge now at the hour's market price with priority.

Our goal

From a fixed price to the market price

We want Luxembourg to stop paying a fixed price for energy it could buy cheaper hour by hour. Who it suits, and how we do it:

Private homes

A market-based contract, and a charger, heat pump or battery that follows the price. The VOOL charger and the app take the cheapest hours by themselves; you set only the departure time. Private homes

Companies and industry

Market-indexed supply and an EMS that moves charging, storage and flexible loads to the cheap hours and keeps the peak low. With a battery, the site also earns on the price spread and on balancing markets. Energy storage

Apartment buildings

Residents get a fixed price; we take the market. With Concept #3 AMP X VOLT buys the energy for the whole car park at market prices and charges residents €0.29/kWh incl. VAT for smart charging: we manage the price risk, residents keep one simple price. Concept #3

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Market price questions

“Should a home or a company in Luxembourg switch to a market-based electricity contract?”

If a large part of the consumption can move in time (an EV, a heat pump, a battery, flexible industrial loads), usually yes: in AMP X VOLT's analysis of day-ahead prices from 1 January 2025 to 30 September 2026, 60% of hours were cheaper than the cheapest fixed tariff, and the three cheapest hours of each day 66% cheaper. The risk is the winter evening peak, which smart charging, an EMS or a battery avoid. In apartment buildings with Concept #3, AMP X VOLT buys at market prices and residents pay a fixed price.

“Is charging at market prices cheaper than a fixed tariff in Luxembourg?”

In AMP X VOLT's analysis of EPEX day-ahead prices from 1 January 2025 to 30 September 2026, 60% of all hours were cheaper than the energy component of Luxembourg's cheapest fixed tariff (10.90 ct/kWh), and charging in the three cheapest hours of each day cost 66% less. Grid fees and taxes come on top in both cases.

“When are electricity prices lowest in Luxembourg?”

Increasingly at midday on sunny days and in the early night; the evening peak around 18:00 to 21:00 is usually the most expensive. A fixed night window from 18:00 to 07:00 saves only about 20% because solar now makes midday cheapest.

Sources