Store your energy, gain independence, anywhere in Belgium

Everything to know before installing a battery

Installing a battery means keeping the electricity you produce for yourself, instead of feeding it back to the grid at a low price. On a Belgian home with panels, the afternoon surplus powers the evening and the night — and with a backup function, the home stays powered even during an outage. But good storage isn’t something you improvise: it all comes down to sizing and to the share of energy you can actually consume yourself.

“The goal is no longer to sell back to the grid, but to consume as much as possible of what you produce — and the battery is what makes that possible in the evening.

The right capacity isn’t the biggest one possible, but the one that matches your evening consumption and your solar production. Too small, it empties too fast; too big, it stays half full and costs a lot for nothing. Here are the options depending on your profile :

• Lithium LiFePO4 The standard

  Stable, safe chemistry, thousands of cycles. The reference technology today.

  See lithium →
• Solar pairing More independence

  Store your daytime surplus for the evening. Ideal under the prosumer tariff.

  Battery + solar →
• Grid backup Outage-proof

  Keep power on your essential circuits even when the grid goes down.

  Backup solution →

People often focus on the battery, but it’s the hybrid inverter that orchestrates everything: it decides when to charge, when to discharge and when to draw from the grid. It’s also what makes backup possible. A new hybrid inverter or adding an AC battery to your existing installation: the choice depends on your current hardware. We’ll explain the concrete impact on your independence.

A wendows advisor helps you weigh capacity, backup and budget — without needless jargon, just as our one stop shop approach intends.

A battery truly comes into its own when it’s fed by your own panels. The battery + solar pairing lets you use in the evening the electricity produced in the afternoon, instead of feeding it back at a low price. If you don’t have panels yet, we study both together ; if you already do, we check the best-suited home battery.

Residential installation benefits from the reduced 6% VAT for homes over ten years old, and depending on your region additional grants may apply. The return on investment depends mainly on your self-consumption and on the gap between the buying and selling price of electricity.

A well-installed battery is cleanly integrated into your panel, connected to code and controlled by an app that shows you charge and discharge day to day. Our after-sales service stays reachable over time for the smallest adjustment, and the warranty covers capacity over the long term.

If you don’t have production yet, storage pairs perfectly with solar panels: you fill the battery with your own energy. Living in a big city ? Our battery in Brussels, in Liège or in your municipality pages detail local grants and references.