Does a battery make sense for a sports club?

A battery makes sense for a sports club when three things come together. The roof produces clearly more than the club uses during the day, the club uses power on most evenings, and one evening peak is expensive. A business battery then stores the midday surplus for training night and keeps the peak lower. If the club only runs at weekends, or the floodlights are still old lamps, start elsewhere.

Maybe you are the treasurer of a football, hockey or tennis club. The panels on the canteen roof run at full power on a Tuesday afternoon, while nobody is there. At seven the floodlights go on, the showers heat up and the coffee machine and bar fridges run. All of it comes from the grid at full price. Then someone on the board asks: "Should we not just buy a battery?"

What the board rarely sees is the season. Floodlights burn most from October to March, exactly when the panels produce least. A battery shifts sunshine from the afternoon to the evening, but it cannot shift summer to winter. The obvious fix is a battery sized to the floodlights of a winter match. That is the most expensive answer, and the one that pays back worst.

The smarter route is the one we use on business sites. On a semi off-grid site in Wingene, a boiler heats up through a resistor once the battery is full: water is used as a battery. On a farm in Tielt, smart control sends surplus to boilers. For a club with showers, that cheap "water battery" often comes before a lithium one.

When is a battery for a sports club worth it?

A battery for a sports club is worth it when surplus solar power and evening use meet on most days of the season. If they only meet on Saturdays, the battery sits full for days and earns little.

Tick most boxes in the middle column, and a battery belongs in the calculation. Tick the right column, and every euro works harder somewhere else first. That honest order also convinces a board, and a municipality that has to co-sign.

What does a sports club use electricity for, and when?

A sports club uses electricity for four big things: floodlights, the canteen, hot water and heating of the changing rooms. Almost all of them run in the evening and at the weekend.

The lighting level decides a lot. According to VoetbalXprt, the Flemish football federation asks for 80 lux for provincial and recreational football. For 5 v 5 or 8 v 8 matches it is 60 lux. For training fields there is no rule, but at least 75 lux is advised. Higher lux means more lamps, and more lamps means a higher evening peak.

Why do solar panels on a clubhouse produce when nobody is there?

Because the sun shines between 8 and 18 and a club comes alive after 17. On a weekday, most of the solar power of a clubhouse roof goes straight into the grid.

That is a bad deal in Belgium today. Inagro puts the 2026 purchase price for a low-voltage business at about 250 euro per MWh all-in, and injection at about 20 euro per MWh. Roughly speaking, every kWh you inject at noon earns a tenth of what it costs to buy back at 20:00. Our guide on whether solar panels still pay off for a business runs that calculation in detail.

The second mismatch is the season. The chart shows how much 1 kWp of solar panels makes per month in Brussels, facing south at the best angle.

Many clubs also take a summer break, just when the panels peak. In late December the sun sets around 16:40 in Brussels, in late June only around 22:00. So the summer surplus is large and the winter evenings are dark and long. A battery handles the first, not the second.

How much can a battery save a sports club?

A battery saves a club money in two ways: it replaces bought power with stored solar power, and it can keep the evening peak lower. The example below shows the order of magnitude. It is an illustration, not an offer.

On a good day the battery avoids buying 36 kWh (9.00 euro) and gives up injecting 40 kWh (0.80 euro). That is about 8.20 euro a day, or about 1,230 euro over 150 days. In Flanders, a monthly peak that stays 10 kW lower saves about 534 euro a year. That is 10 kW x 53.39 euro, the 2026 average capacity tariff excl. VAT. Together that is about 1,750 euro a year. Divide the price in your offer by that amount, and you have the simple payback.

Two numbers put this in perspective. In December, a 30 kWp roof makes on average about 31 kWh a day (PVGIS, 32 kWh per kWp for the month). One evening of floodlights at about 15 kW for three hours already uses 45 kWh. In winter the battery lives from the grid, not from the roof. With a dynamic contract it can charge at cheaper hours, but it must not create a new peak while doing so. Our article on a dynamic energy contract with a battery explains how.

Do floodlights raise the capacity tariff of a sports club?

In Flanders, yes: floodlights that go on at the same moment as the kitchen and the boilers can set the monthly peak of a sports club. That peak is billed through the capacity tariff.

Fluvius measures your average power per quarter of an hour. The highest quarter-hour of the month is your monthly peak. You pay on the average of the monthly peaks over twelve months, with a minimum of 2.5 kW. The 2026 average is about 53.39 euro per kW per year excl. VAT, according to the Vlaamse Nutsregulator. It does not matter whether that peak falls on a Tuesday evening or a Saturday afternoon. Clubs with a larger connection and peak metering pay on their monthly peak as well.

Much of that peak can be removed without a battery. Let the boilers heat before training instead of during it. Switch the pitches on one after the other. Keep the fryer and the dishwasher out of the first quarter-hour after training. Our guide on how to read and lower your business peak demand shows how to find the quarter-hour that sets it. For the formula, read our explanation of how the capacity tariff for businesses is calculated.

What remains can be shaved with a battery that is told to keep grid offtake under a limit. Our high-power battery systems for businesses come with monitoring, control and optimisation included. That control is what turns a battery into a lower peak.

What should a sports club do before buying a battery?

Do the cheap steps first: light, hot water, timing and measuring. They often save more per euro than storage, and they make the battery smaller if you still need one.

Want to know how a control layer decides when boilers, chargers and a battery run? Then read our guide on what an energy management system does for a business.

Who pays for a battery at a sports club: the club, the municipality or a sponsor?

Whoever owns the connection and will still be there in ten years should own the battery. For many clubs that is the municipality or an autonomous municipal company, not the club itself.

Tax matters too. Most non-profit associations (vzw/asbl) pay legal entities tax, and are in principle not taxed on their profits, says the FPS Finance. The investment deduction for energy investments is a deduction from taxable profit, so a club in that regime usually cannot use it. A club that is subject to corporate tax may. Ask your accountant which regime applies. Our overview of subsidies and tax deductions for a business battery lists what exists for companies.

A club next to a school, a sports hall or a municipal building has another option. In all three regions, users can share solar power through the public grid. The rules differ per region: in Wallonia, for example, within one building or through an energy community. Our article on energy sharing between businesses explains how that works, and when it beats a battery.

Is it different for a sports club in Wallonia or Brussels?

Yes. In Wallonia the time of day matters more than the peak, and that suits a battery at a sports club. Since 2026 the bi-hourly low-voltage tariff has an extra off-peak period from 11:00 to 17:00, every day, according to the CWaPE.

The off-peak hours are 11:00 to 17:00 and 22:00 to 07:00; the evening from 17:00 to 22:00 is billed at the full rate. That evening block is exactly when a club trains. A battery that charges on solar or cheap midday power and discharges from 17:00 therefore fits the Walloon tariff well. The standard low-voltage tariff of ORES has no capacity term; professional sites with peak metering do pay a capacity term in euro per kW.

The nearest example in Wallonia is not a club but a school. A private school in Incourt runs fully off the grid on new solar panels, a battery system and a generator. It shows that a community building with busy hours can be supplied on its own terms.

In Brussels, Sibelga applies its own tariff structure. Check how your invoice charges peaks and time periods before you calculate.

What happens when your club asks us to look at it?

We start from your real consumption and your season, not from a standard battery size. The steps are the same as for any business site.

1. Step 1: Analysis and sizing. Send us your quarter-hour data if you have it; if not, we can monitor your consumption for a short period first.
2. Step 2: Technical design, matched to your consumption, your solar production and your plans (LED, heat pump, charging points).
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 state of the battery, with reports per minute, hour or day.