Electricity meter capacity in Luxembourg: complete guide 2026
In Luxembourg, your electricity meter capacity — expressed in amperes (A) — determines how much electricity you can use simultaneously. Since 1 January 2025, a new network tariff structure introduces the concept of reference power (Pref), which directly impacts your bill if you have a heat pump, EV charger or other energy-intensive equipment. This guide explains how the system works, which capacity to choose for your profile, and how to request a change from Creos.
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Compare electricity offers →1. Meter capacity: how it works in Luxembourg
In Luxembourg, your electricity meter is managed by Creos (across most of the territory), or by local network operators (Sudstroum, Ville de Diekirch, Ville d’Ettelbruck). It defines the maximum power your installation can draw from the grid at any given moment. Standard low-voltage connection levels for residential customers are: 40 A, 50 A, 63 A, 80 A and 100 A (per phase).
| Amperage | Single-phase power (230 V) | Three-phase power (400 V) | Typical profile |
|---|---|---|---|
| 40 A | ≈ 9.2 kW | ≈ 27.7 kW | Apartment, small house without energy-intensive equipment |
| 50 A | ≈ 11.5 kW | ≈ 34.6 kW | Medium house, electric cooker |
| 63 A | ≈ 14.5 kW | ≈ 43.7 kW | House with moderate heat pump or EV charger |
| 80 A | ≈ 18.4 kW | ≈ 55.4 kW | Large house with heat pump + EV charger |
| 100 A | ≈ 23 kW | ≈ 69.3 kW | Very large house, multiple simultaneous high-power uses |
Source: Creos — Network tariffs 2026 · ILR — Network tariffs.
Creos is responsible for the network up to and including your meter. Everything downstream — your electrical panel, circuits, outlets — is your private installation and must comply with Creos technical requirements (TAB). All connection or modification requests are made via myCreos.lu.
2. Which capacity level for which household profile?
Sufficient for a household without electric heating, no EV charger and no heat pump. If you plan to install an EV charger or heat pump in the coming years, anticipate upgrading to 50 or 63 A now.
The most common level in Luxembourg single-family homes. Suitable for a fully electric kitchen, electric water heater, and a 7.4 kW EV charger (single-phase). Often sufficient for a 6–8 kW air-to-water heat pump if usage is staggered over time.
Recommended if you combine a powerful heat pump (10 kW+), an 11 kW three-phase EV charger and other energy-intensive equipment (pool, sauna, thermodynamic water heater). For connections above 100 A, Creos issues a bespoke quote.
Air-to-water heat pump running (8 kW) ……. 8,000 W
EV charger (11 kW three-phase) …………. 11,000 W
Induction hob (4 rings simultaneous) ……. 7,200 W
Electric water heater …………………. 2,000 W
Lighting + standard appliances …………. 1,500 W
Total theoretical simultaneous power …. 29,700 W ≈ 30 kW
With 63 A three-phase (≈ 43.7 kW available), this household is covered — provided all equipment is not running simultaneously. 80 A provides a comfortable margin.
Under-dimensioning leads to frequent tripping and, in extreme cases, overheating and fire risk if the breaker fails. But unnecessarily over-dimensioning means higher fixed network charges since the 2025 tariff reform — the Pref assigned by Creos is based on your actual consumption behaviour. Correct dimensioning is preferable to oversizing.
3. Reference power (Pref): the major 2025 reform
Since 1 January 2025, the ILR and network operators introduced a new tariff structure for low-voltage electricity in Luxembourg. This reform introduces the concept of reference power (Pref) in network charge calculations.
Among Switchr users who entered their equipment details in 2026, the estimated breakdown by subscription category is as follows: 3 kW: 55% · 7 kW: 33% · 12 kW: 9% · 17 kW: 3%. The vast majority of standard households remain in the base category — only households equipped with a heat pump, EV charger or multiple high-draw appliances running simultaneously move up to a higher category.
Pref is distinct from connection capacity (amperage). Your meter may be connected at 63 A, but your Pref could be set at 3 kW if your actual consumption habits don’t exceed that threshold. It is your actual consumption behaviour over the previous 12 months that determines your Pref — not your connection amperage.
Your Pref is adjusted automatically each month by Creos based on your consumption habits over the previous 12 months. It is shown on your electricity bill since January 2025, and visible in your MyCreos account. To simulate the impact of your Pref on your bill, use the free tool at my.creos.net.
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4. How does Pref affect your electricity bill?
Since the 2025 tariff reform, your network charges consist of three elements, two of which are directly linked to your power level.
Scenario A — Heat pump + EV charger used simultaneously (19 kW peak):
→ High Pref assigned → higher monthly fixed network charge
→ Surcharges for excess kWh above Pref
Scenario B — Heat pump at night, EV charger scheduled separately:
→ Peak reduced to 8–10 kW max → lower Pref → lower fixed charge
→ No excess surcharge
Staggering energy-intensive equipment usage directly reduces your Pref and network bill.
5. Heat pump, EV, solar: adapting your capacity
| Equipment | Typical power | Impact on Pref | Recommendation |
|---|---|---|---|
| Air-to-water heat pump | 5 to 12 kW | High if used simultaneously with other equipment | Schedule operation during off-peak or low household consumption hours |
| EV charger (7.4 kW) | 7.4 kW (single-phase) | Moderate — may stay within base Pref if used alone | Schedule overnight charging, outside heat pump operation |
| EV charger (11 kW) | 11 kW (three-phase) | High if simultaneous with heat pump — requires three-phase | HEMS recommended to limit total simultaneous power |
| Solar panels (injection) | Variable production | Can reduce Pref on import side if well-dimensioned | Couple with HEMS to prioritise heat pump and EV charger on PV production |
Without HEMS
- No additional investment
- Simple day-to-day operation
- Risk of simultaneous power peaks
- Higher Pref → higher fixed network charge
- Possible excess surcharges
With HEMS
- Automatically optimises simultaneous usage
- Limits drawn power → controlled Pref
- Prioritises PV production for heat pump and EV charger
- Eligible for €500 Klimabonus grant (from Oct. 2026)
- Initial investment of several hundred to thousands of euros
- Requires a communicating smart meter
6. Single-phase vs three-phase: what’s the difference?
| Criterion | Single-phase (230 V) | Three-phase (400 V) |
|---|---|---|
| Max. power at 40 A | ≈ 9.2 kW | ≈ 27.7 kW |
| 11 kW EV charger | ✗ Not compatible (limited to 7.4 kW) | ✓ Compatible |
| Heat pump > 8 kW | ⚠ Limited depending on model | ✓ Compatible |
| Switching single → three-phase | Possible via Creos — on request, with technical intervention, ~30-day lead time | |
If your home is currently connected in single-phase and you wish to install an 11 kW EV charger or a three-phase heat pump, you must request the switch to three-phase from Creos. This is a chargeable service (tariffs published in Creos’s annual service catalogue approved by the ILR) and may take several weeks. Factor this into your project planning.
7. How to upgrade your meter capacity in Luxembourg?
Your electrician evaluates whether your current installation (panel, wiring, breakers) is compatible with the new desired capacity. They also identify whether a switch to three-phase is necessary and compile the technical file.
The connection modification request (capacity upgrade, single → three-phase switch, meter relocation) is submitted via myCreos.lu. Your electrician can submit it on your behalf. The form must be signed by the electrician before submission.
Upon receipt of the request, Creos contacts your electrician to schedule a pilot visit to assess the preparatory work required. A Creos quote is then sent to you with costs and terms.
Your electrician carries out the preparatory works (panel upgrade, wiring). A Creos pilot agent then inspects compliance. If approved, Creos executes the connection modification within 30 days of validation.
Plan ahead for lead times. A capacity upgrade request can take several weeks between the request, the pilot visit, the preparatory works and the Creos intervention. If you are planning a heat pump or EV charger installation, start the capacity verification process in parallel with the subsidy applications (Klimabonus, Enoprimes) — don’t wait until the last moment.
8. How to optimise your Pref to reduce your network bill?
The simplest and most accessible measure: avoid running the heat pump, washing machine, dishwasher and EV charger simultaneously. Schedule the washing machine in the morning, the EV charger at night. This redistribution may be enough to maintain a low Pref.
Night charging avoids overlap with the heat pump running during the day (especially in mid-season). With solar panels, schedule EV charging during peak production hours (10am–2pm) to self-consume and limit grid draw.
Most OCPP chargers allow power limiting (e.g. to 3.7 kW instead of 11 kW) during high household consumption periods. This is accessible via the charger app or a HEMS.
A home energy management system automatically controls all your connected equipment (heat pump, EV charger, water heater, solar panels) to optimise energy flows and avoid power peaks. It can significantly reduce your Pref and fixed network charge. A HEMS will be eligible for a €500 Klimabonus grant from October 2026.
To precisely simulate the impact of your consumption habits on your Pref and network bill, use the free tool provided by Creos at my.creos.net. You can test different scenarios (adding an EV, a heat pump, changing habits) and see the estimated impact on your reference power.
Frequently asked questions — electricity meter capacity Luxembourg
How can I find out my electricity meter capacity in Luxembourg?
Your connection capacity is shown on your electricity bill since January 2025 (reference power section), in your MyEnovos, MySudstroum or other client portal depending on your supplier, and on the my.creos.net platform. It is also visible directly on your electricity meter or main circuit breaker. If in doubt, a certified electrician can identify your configuration precisely during a visit.
Which meter capacity is needed for a heat pump in Luxembourg?
For a house with a 6–8 kW air-to-water heat pump, a connection of 50 to 63 A three-phase is generally sufficient — provided you avoid simultaneously running all high-power equipment at full capacity. For a large house combining a powerful heat pump (10 kW+), an 11 kW EV charger and other equipment, 80 A provides a comfortable margin. Your electrician carries out a precise power assessment during the installation survey. See our guide on the electricity supplier & heat pump in Luxembourg.
What is the reference power (Pref) and how is it calculated?
The reference power (Pref) is a power level automatically assigned by Creos based on your consumption history over the previous 12 months. It is adjusted monthly. Most households without energy-intensive equipment have a Pref of 3 kW — the base level with the lowest fixed charge. If you regularly have higher power peaks (simultaneous heat pump + EV charger, for example), your Pref automatically rises, resulting in a higher monthly fixed charge. It is visible on your bill since January 2025 and on my.creos.net.
Is switching to three-phase free with Creos in Luxembourg?
No — switching from single-phase to three-phase is a chargeable service. Tariffs are published in Creos’s annual service catalogue, approved by the ILR. Contact Creos via myCreos.lu with your electrician to obtain a personalised quote. Note that installation of a smart meter (communicating) is free on request — and is mandatory for EV chargers of 7 kW and above.
Electricity & network in Luxembourg
Energy-intensive equipment