Best electricity supplier for electric heating

Heating your home with electricity, in Belgium, means living with a bill two to four times heavier than average. Storage heaters, convectors, water tank or heat pump: an all-electric home often consumes 8,000 to 15,000 kWh a year, versus 3,500 kWh for a typical household. At that volume, the choice of supplier and tariff is no longer a matter of a few euros, but of several hundred. Here is how to decide, and why the off-peak price matters more than the name on the bill. For the full market picture, see our ranking of the best electricity suppliers.

Why does electric heating change how you pick a supplier?

Because volume dwarfs everything else. When I compared dozens of all-electric home bills, one thing kept coming up: across 10,000 kWh, a gap of a single cent per kWh already means 100 € a year. The welcome bonus or small digital perk that win over a 3,500 kWh household count for little against the raw kWh price multiplied by high consumption. In practice, a household that heats with electricity must therefore look first at the kWh rate — and above all the off-peak one — before the add-on services. It is the opposite of a small consumer's reflex, for whom the fixed standing charge weighs more.

Dual-hour or exclusive-night meter for electric heating?

Both work, but the dual-hour meter is now the more flexible choice. Historically, the exclusive-night meter fed a separate circuit dedicated to storage heaters and the water tank, billed only at night. The dual-hour meter applies a day rate and a night rate to the whole home. What the CREG says matters here: the dual-hour off-peak kWh price and the exclusive-night one are now nearly equivalent on the supplier side. In other words, exclusive-night no longer has the decisive price edge it once had. In practice, for a new home with a heat pump that also runs during the day, the dual-hour meter alone is enough; exclusive-night only makes sense if most of the heating charges at night on older storage heaters.

Which electricity supplier is cheapest for high heating consumption?

For a large volume, the suppliers with the lowest kWh win, because the gap is multiplied. In mid-2026, Mega regularly tops the comparators on a variable profile, with an annual cost around 2,265 € on an average dual offer, and the gap with the most expensive supplier on the market (often Luminus) reaches nearly 290 € a year — a gap that mechanically swells for an all-electric home. Bolt follows closely, with credible Belgian green electricity as a bonus. The incumbents are not out of the race, though: Luminus and Engie offer well-built dual-hour deals and services (breakdown cover, home automation, monitoring) that reassure heavy consumers. Here is how to place them by heating profile.

Prices change every quarter: always check your own case before signing, via the supplier ranking and your region's official comparator.

Does the 2026 Walloon dual-hour reform change the maths?

Yes, and rather in favour of controlled electric heating. Since 1 January 2026 in Wallonia, off-peak hours are no longer limited to the night: a new window from 11am to 5pm has been added to the 10pm–7am one. In total, there are now 105 off-peak hours a week, or 15 hours a day, 7 days a week, with no more distinction between weekdays and weekends. In practice, a household with a programmable thermostat or a controllable heat pump can pre-heat the home or recharge a tank in the middle of the afternoon, at the reduced rate. In Brussels, the off-peak window stays 10pm–7am on weekdays plus the whole weekend. This new afternoon off-peak strengthens the case for a dual-hour contract with a low off-peak price — a point to check supplier by supplier, since the regulator only sets the network tariffs, not the supplier's margin.

Fixed, variable or dynamic tariff for an all-electric home?

A well-priced variable is often still the cheapest, but all-electric amplifies price risk. For a household consuming 3,500 kWh, a winter spike hurts; for a home at 12,000 kWh, it can run into hundreds of euros. A cautious profile can therefore lock in a fixed rate before winter to sleep easy, accepting a slightly higher average. Conversely, a very flexible household, able to shift heating towards the cheapest hours, can take advantage of a dynamic contract indexed on the hourly wholesale price — a route we detail in our guide to the best dynamic-tariff supplier. The VREG notes that a household able to steer its consumption can gain several dozen euros a year, but that an inflexible household risks paying more instead.

Which supplier should you choose depending on your type of electric heating?

The right choice depends first on how you heat. For old storage heaters that charge at night, go for the supplier with the lowest off-peak price — Mega or Bolt usually stand out, and a dual-hour meter (or exclusive-night if the circuit already exists) remains relevant. For a modern heat pump running day and night, a broad dual-hour deal at Luminus or Engie, able to exploit the Walloon afternoon off-peak, makes sense. For a very controllable profile, equipped with home automation or a battery, a dynamic tariff at TotalEnergies, Bolt or Engie can lower the bill. And if your priority is green without blowing the budget, Bolt and its Belgian production remain a good compromise. In every case, Julien's rule fits in one sentence: compare before you sign, and watch the off-peak price as much as the day rate. Find the whole market in our ranking of the best electricity suppliers.