All savings the battery generates over its 15-year lifetime, minus the installation cost, the bottom-line number that tells you if the investment is really worth it.
Is a Home Battery Worth It in Belgium?
MyBattery.be's Belgian home battery simulator doesn't give you a single, vague number based on national averages. It models ~35,000 quarter-hourly data points over a full year of real 2025/2026 Belgian electricity prices, regional network tariffs and your own household profile.
Then, it tells you how much a battery would have saved you, when it would break even, and what it would gain over its 15-year lifetime.
Five quick steps, no sign-up, just an answer to the question "is a home battery actually worth it for my house?".
Describe your household's energy profile
Yearly consumption in kWh (or just the number of people if you don't know it), solar panels (kWc), number of EVs charging at home, and whether you heat with a heat pump.
Independent, transparent, built on real Belgian market data
MyBattery.be is independent and we don't sell batteries. We are an independent home battery simulator built specifically for Belgian households, in Wallonia, Flanders and Brussels, with one goal: give you an honest answer to the question "is a home battery actually profitable for my home?".
The simulation runs on real 2025 and 2026 Belgian electricity spot prices, official network tariffs for each region, and a quarter-hourly consumption profile derived from your inputs. Every parameter that actually moves the needle on profitability is taken into account: meter type (analog or digital / communicant), tariff (single-rate, two-rate, or Impact in Wallonia), the Flemish capacity tariff (capaciteitstarief), contract type (fixed, variable or dynamic), solar production, EV charging, heat pumps, and whether your battery is a standard one or a smart one optimising hourly prices.
The result is a number you can actually trust, and two representative days (summer + winter) showing you exactly how the battery would behave in your home, so nothing is a black box.
FAQ: Home battery simulator Belgium
Everything you wanted to know before investing in a home battery or solar battery (huisbatterij / batterie domestique) in Belgium: profitability, payback period, smart vs. standard batteries, capacity tariff, dynamic contracts and more.
Is a home battery actually profitable in Belgium in 2026?
It depends, and that is exactly what our simulator answers for your specific home. For most Belgian households with solar panels, a digital meter and a variable or dynamic electricity contract, a home battery currently reaches break-even in 6 to 12 years and generates several thousand euros of net gain over its 15-year lifetime. Households without PV typically need a smart battery on a dynamic contract to be profitable. The only way to know for sure is to run a simulation with your own numbers.
How much can I save per year with a home battery?
Yearly savings on the electricity bill typically range from €200 to €1,500 per household, depending on your yearly consumption, your PV production, your region (Wallonia, Flanders, Brussels), your meter, your contract and whether the battery is smart. The simulator returns the exact euro amount for your home, computed from real 2025 and 2026 Belgian electricity prices.
How long is the payback period of a home battery?
Investment break-even is currently 6 to 12 years for most Belgian households, based on an installed cost of around €300 per kWh of storage capacity. After break-even, every additional year is pure gain, and a quality home battery is designed to last around 15 years, so the total lifetime gain often reaches several thousand euros.
Do I need solar panels to benefit from a home battery?
No, but it changes the strategy. With PV, a solar battery boosts self-consumption: instead of injecting your surplus cheaply and re-buying it expensively at night, you store and reuse it. Without PV, only a smart battery on a dynamic contract is usually profitable: it charges from the grid at the cheapest hours and discharges during peak hours. The simulator handles both situations.
Does the simulator work for Wallonia, Flanders and Brussels?
Yes. All three Belgian regions are fully supported, each with their own network tariffs, meter rules and exclusive options, including the tarif Impact (Wallonia + digital meter only) and the Flemish capacity tariff / capaciteitstarief (Flanders + digital meter only).
What is a smart home battery and is it worth the extra cost?
A standard battery charges from your solar surplus and discharges as soon as you draw from the grid. A smart battery waits for the most expensive hours to discharge and, when its state of charge is too low, charges from the grid at night when prices are cheap (very useful in winter). On a dynamic contract, a smart battery often more than doubles yearly savings, the simulator lets you compare both side by side for your home.
How does the Flemish capacity tariff (capaciteitstarief) affect a home battery?
If you live in Flanders with a digital meter, your bill includes a capacity tariff based on the highest monthly offtake peak (in kW) your home pulls from the grid. A home battery, especially a smart one, can shave that peak by discharging during your worst spikes, cutting this part of the bill significantly. The simulator models this peak shaving in detail.
Does the simulator account for EVs and heat pumps?
Yes. You can enter the number of electric vehicles charging at home and indicate whether your heating runs on a heat pump. Both massively change your consumption profile, and therefore the right battery size and the resulting profitability, so they are fully integrated in the simulation.
How big should my home battery be (in kWh)?
The simulator helps you find out. As a rule of thumb, the optimal capacity is the one that maximises your total gain over 15 years, not necessarily the biggest battery. Too small and you miss cheap-hour opportunities; too big and the top kWh stay unused while inflating your investment. Try several capacities in the simulator to see the sweet spot for your home.
Fixed, variable or dynamic electricity contract, which works best with a battery?
A fixed contract gives a battery very little extra value beyond solar self-consumption. A variable contract (the most common in Belgium) brings moderate gains. A dynamic contract, where the price changes every hour, unlocks the full potential of a smart battery and often doubles the yearly savings. The simulator quantifies the difference for your specific home.
Is MyBattery.be really free and independent?
Yes. The simulator is 100% free and no sign-up is required. We are independent and we don't sell batteries, our only goal is to give Belgian households a transparent answer to the question "is a home battery actually worth it for me?".
Where does the data come from and how accurate is the simulation?
The simulation runs on real 2025 and 2026 Belgian electricity spot prices, official network tariffs for Wallonia, Flanders and Brussels, and quarter-hourly consumption and PV production profiles representative of Belgian households. A full year is simulated (≈35,000 quarter-hourly data points) and we display two representative days, one in summer, one in winter, so you can verify exactly how the battery would behave at your home and trust the resulting numbers.
All Belgian Homes
From a small apartment in Brussels to a large family home in Flanders or Wallonia with solar panels, an EV and a heat pump, the simulator covers every combination of region, meter, tariff, contract and equipment found in Belgium, whether you're sizing a standalone home battery or a full solar battery setup.
Home battery simulator
