How do bakery ovens drive up the capacity tariff?

The capacity tariff charges your grid costs on the highest quarter-hour of each month. In a bakery that quarter-hour falls early in the morning, when the ovens heat up together. Stagger the ovens and the other big loads first: it costs nothing. Then a business battery can deliver the part of the peak that remains. It also stores the midday solar power of the shop for the next bake. A butcher's shop cools all day and cooks in the morning, so its profile is flatter, and it overlaps better with solar.

You know the rhythm. The alarm goes at three, the ovens go on, the kneader starts, and the proofers and the cold rooms never stopped. By the time the first customer walks in, the peak of the month is already on the meter. And the solar panels on the roof? They wake up when the baking is done.

Energy has hit craft food hard. In 2022 a bakery chain in Flemish Brabant told VRT NWS that its energy bill had gone from 20,000 to 80,000 euro a month. That was for all its shops together. It switched off the big cooling counter three days a week. What most bakers do not see: the bill has two parts, the kWh you use and one quarter-hour a month you pay for all year. That second part does not care whether you bake at night.

We size on measured data, not on guesses. For a garden contractor in Zele, we first monitored average and peak consumption for one month, then matched the solar panels to the real use. That is the right start for a bakery too. On a farm in Tielt, a battery system of 45 kVA and 123.2 kWh now gives the site more power. A heavier connection was not needed.

Why does a bakery set its peak at four in the morning?

Because everything that draws power starts in the same short window before opening. The ovens preheat, the kneader and the divider run, and the cooling and proofers keep going in the background.

The City of Paris describes the typical day of a bakery in its energy guide for shops. At night only the cooling and the proofing cabinets run. Then come the kneader and the divider. Next the bread oven preheats together with the pastry oven. During the bake, induction plates and small appliances join in. Later in the day the load falls back to cooling and proofing.

How big is a bakery's energy use? A 2008 study by ARENE, the regional energy agency around Paris, looked at this. An average bakery of 165 m² with four employees used about 99,000 kWh a year. For an average butcher's shop of 91 m² it was about 28,000 kWh. Those are French figures, but they show the gap between the two trades.

What does an early-morning peak cost a bakery on the capacity tariff?

In Flanders, every kW of your monthly peak costs on average about 53.39 euro a year in 2026, excl. VAT. The Vlaamse Nutsregulator calls the highest quarter-hour of a month your monthly peak. Your billing peak is the average of the last 12 monthly peaks.

Two details make this hard for bakers. First, the time of day no longer matters for the grid part of the bill. Fluvius explains that the difference between the day and night rate disappears from the grid tariffs. Your supplier may still offer a cheaper night rate on the energy itself. Second, a bakery bakes almost every day. So the morning peak is not a one-off: it lands in every month.

Take an example bakery. If the ovens, the kneader and the cooling all start at 4:00, the meter sees a quarter-hour of 36 kW. If the second oven starts 30 minutes later, the peak drops to 24 kW. Same bread, same kWh, 12 kW less on the bill:

Everyone pays at least the minimum of 2.5 kW, and every kW above it costs the same. Sites with a larger connection and peak metering are also billed on their peaks. For the full formula, read our explanation of how the capacity tariff for businesses is calculated.

Is the capacity tariff of a butcher's shop different from a bakery's?

The tariff is the same, but the profile of a butcher's shop is flatter. A butcher cools day and night and cooks during the morning, so the load is spread over opening hours instead of packed before dawn.

The City of Paris describes the typical day of a butcher's shop too. The meat is cooled all the time. During opening hours the washing machine, the blast chiller, the lighting and the small preparation machines add to it. Cooking, the rotisserie and hot water come on top. In the Paris example they run on gas; in many shops they are electric.

That changes where the peak lands. In a butcher's shop the peak often comes mid-morning, when cooking, the blast chiller and the dishwasher meet. That is daylight, so solar panels can help directly. In Flanders a butcher, or beenhouwer, follows exactly the same peak rules as a bakery.

Many shops are both: a baker with a pastry cold room, or a butcher with a kitchen for prepared meals. Then look at your own quarter-hour data, not at the name of the trade.

How do you lower the oven peak of a bakery without buying anything?

By making sure the big loads do not start in the same quarter-hour. Most bakeries can cut their peak with timers and a new start order, before any investment.

Our guide on how to read and lower your business peak demand shows how to find the quarter-hour that sets it, step by step.

Why do solar panels hardly help a bakery with its morning peak?

Because the bake is over before the panels produce much. Solar panels on a bakery roof produce during the day, when only the shop, the cooling and the counters run.

That does not make panels useless. They cover the cooling counters, the coffee machine and the dishwasher during opening hours. But they cannot touch the ovens at four in the morning, so they do not lower the peak that sets the capacity tariff. Even in late June the sun only rises around 5:30 in Brussels, and the first hours give little. In late December it rises around 8:40.

And what the shop does not use goes into the grid. Injected power earns much less than you pay to buy it back the next morning. Our guide on whether solar panels still pay off on a business roof runs that calculation.

When does a battery make sense for a bakery or butcher's shop?

When the peak that remains after staggering is still high every month, and the shop injects solar power during the day. Then one battery does two jobs: it stores the afternoon surplus and delivers it during the next morning's bake.

In a Victron system this is called peak shaving. The control keeps what you take from the grid under a limit you set. When the ovens pull above it, the battery delivers the difference. Two numbers set the size. The kW above your limit set the inverter power, and the minutes the preheat lasts set the energy.

The same battery can keep a reserve for a power cut. The Victron energy management (ESS) keeps a minimum charge that is only used when the grid fails. For cold rooms that is worth it. Our article on how long a battery keeps a cold room cold covers that side.

There is a third job. With a dynamic contract, the battery can charge at the cheapest hours, as long as it does not create a new peak. Our article on a dynamic energy contract with a battery explains how.

Want the full picture of how a battery keeps a peak under a limit? Read our guide on what peak shaving is and when a battery pays off.

What happens to your peak when a bakery swaps a gas oven for an electric one?

It jumps, because the biggest load of the bakery moves from the gas meter to the electricity meter. The preheat of an electric oven lands in the same early quarter-hour as the kneader and the cooling.

Before you order, check two things. Can your connection deliver the extra power at all, or will the main fuse trip? And what does the new peak cost every month on the capacity tariff? Our article on what happens to your connection and peak when you swap gas for a heat pump walks through the same questions for heating.

If the connection is too small, a heavier connection is not the only answer. On the farm in Tielt, the battery system adds power, so the site did not need a heavier connection. Our article on more power without a heavier grid connection compares the options.

Is it different for a bakery in Wallonia or Brussels?

Yes. In Wallonia a small shop pays no capacity term on the standard low-voltage tariff, and the night is off-peak. Since 2026, the Walloon bi-hourly tariff has off-peak hours from 22:00 to 7:00 and from 11:00 to 17:00, according to the CWaPE.

For a baker that is good news. Most of the bake falls in off-peak hours. Larger sites with peak metering do pay a capacity term at ORES, so the morning peak still counts there. In Brussels, Sibelga charges small low-voltage sites a fixed amount that does not follow the measured peak.

Our article on grid tariffs for businesses in Wallonia and Brussels explains the details per grid operator.

What happens when you ask us to look at your bakery or shop?

We start with your quarter-hour data and your morning routine, not with a battery size.

1. Step 1: Analysis and sizing. We look at your quarter-hour data and your ovens, cooling and roof. If data is missing, we can monitor your consumption for a short period first.
2. Step 2: Technical design. We check what staggering can do, then size the inverter on the part of the peak that remains.
3. Step 3: Installation and commissioning.
4. Step 4: Monitoring and support. Through our app and the VRM portal you follow consumption per phase, solar yield and the battery.

Our battery systems for businesses come with monitoring, control and optimisation included. That control is what turns stored energy into a lower peak. Want to know how a control layer decides when ovens, boilers and a battery run? Read our guide on what an energy management system does for a business.