Home battery end of life: second life or recycling?

A home battery reaches the end of its life when it can no longer do what your home needs, safely. That is rarely the day the warranty ends. Then you have four routes. Keep using it, revise or extend it, give it a second life after a test, or send it to lithium battery recycling. It never goes with the general waste, and in Flanders the recycling park does not accept it. In Belgium, Bebat organises free collection for registered home batteries, usually through the installer.

Your home battery has been running for eight or ten years. In winter it is empty earlier every evening, or you are renovating and a larger system is on the table. Then comes the question nobody asked when you bought it: what happens to the old one? "Why can't it just go to the recycling park?" one Belgian owner asked on Reddit. Another owner told VRT he assumed his installer had registered his battery. It had no serial number in Bebat's database.

He is not alone. According to a Bebat survey reported by VRT on 2 September 2026, only 1 in 10 Belgians knows that a home battery must be registered. The hidden costs are real. An unregistered battery can turn free collection into a bill. A battery scrapped too early throws away years of back-up. And once the system is dismantled without saving its data, a second life is hard to prove.

We see both ends of the story. We revise, maintain and repair installed battery systems. And in our Battery Disassembly Center, we take apart lithium batteries from cars, bicycles and home batteries.

When is a home battery really at the end of its life?

A home battery is at the end of its life when it can no longer deliver what your home needs from it, safely. That moment depends on how you use it, not on a fixed percentage.

The EU Battery Regulation defines the state of health as the general condition of a battery. It measures how well the battery still performs compared with when it was new. How that condition fades over years and cycles is explained in our article on how long a premium home battery lasts.

In a large home with back-up, four signs mark the real end of its first life:

• Too little energy for your back-up. The battery no longer covers a winter evening, or the hours of a power cut you planned for.
• Too little power under load. The voltage sags when the heat pump starts, and the system falls back on the grid early.
• Damage or a fault. Swelling, heat, a smell, a leak or repeated alarms from the battery management system.
• No support left. The battery still works, but spare parts, firmware or a compatible inverter are no longer available.

The first two signs do not make the battery waste. A battery that is too small for your house can still be useful in a lighter role. The third sign is different: stop using the battery and call a specialist. Our article on whether a home battery is a fire risk explains why. Not sure whether it is age or a fault? Our article on a home battery that is not working properly walks through the checks.

Keep, revise, second life or recycling: what are your options?

There are four routes for an ageing home battery, and the sensible order is: use it longer first, recycle last. EU law gives each route a precise meaning.

Source: Regulation (EU) 2023/1542, article 3. Adding modules to an older battery has its own rules on compatibility and warranty. Our article on expanding a home battery later explains them.

Can your old home battery get a second life?

Yes, if it is tested, undamaged and a specialist takes responsibility for it. A second life is more than passing the battery on: it is a documented step.

When a waste industrial battery is prepared for re-use or repurposing, its holder must be able to show three things to the authorities:

• A state-of-health record from a test carried out in an EU member state, confirming the battery can deliver the performance its new use needs.
• An invoice or contract for the sale or transfer of the battery for that further use.
• Protection against damage in transport, with sufficient packaging and proper stacking.

Source: Regulation (EU) 2023/1542, article 73. The data for that test sits in the battery itself. Since 18 August 2024, the battery management system of a stationary storage battery must hold its state-of-health data. The person who legally bought the battery has read-only access, also to judge its reuse or repurposing.

From 18 February 2027, a repurposed battery that is put into service needs a new battery passport, linked to the passport of the original battery. The company that puts it back into service takes over that responsibility.

Some owners reuse an old low-voltage battery themselves, for example as a small back-up for the router and the internet box. For the modules of a large home battery, that is not a weekend job. The voltage, the weight and the fire risk ask for a specialist.

In our Battery Disassembly Center, screening decides. A battery that is found suitable can be reused in second-life applications. If not, it is classed as end of life after the measurements. Companies weighing up second-life storage can read our article on second-life batteries for businesses.

Where do you hand in a home battery at the end of its life?

A home battery goes back through the producer's take-back system, usually via your installer. It never goes with the general waste, and in Flanders never to the recycling park. EU law obliges every end user to discard waste batteries separately.

Since 18 August 2025, the waste chapter of the EU Battery Regulation applies. A home battery counts as an industrial battery, and producers of industrial batteries must take them back free of charge. When a battery must first be dismantled at a private home, the producer may not charge the owner for dismantling and collection.

Sources: OVAM, collection of waste batteries; Ecowerf sorting guide (Flanders). In Wallonia and Brussels, Bebat is the approved body for all battery categories, and the same EU take-back duty applies (SPW Environnement).

The environmental contribution is paid when the battery is sold, not when it is collected. Bebat calls this "Pay as you Sell". For home batteries it applies to batteries placed on the market from 1 January 2022.

How do you check that your home battery is registered with Bebat?

Enter the serial number of every module in Bebat's online check. It takes a few seconds and shows whether the environmental contribution was paid.

• Find the serial numbers on each module or in the app of your battery. A battery with several modules needs every serial number checked.
• Enter them, or upload a clear photo, in Bebat's RecyReady check.
• Not found? That does not automatically mean the battery is not registered. Contact Bebat, and if needed the seller, installer or webshop.

You cannot register a battery yourself: the producer, importer or seller declares the modules and their serial numbers. Since 1 January 2022, home battery modules up to 200 kg carry the mandatory contribution. Since 1 May 2025, it covers all home battery modules in installations up to 16 MWh, and plug-and-play batteries too.

How is a large home battery removed safely?

Removing a home battery is electrical work, done by a professional in the order the maker prescribes. The battery still holds energy when the house is switched off.

• Save the data first. Export the state of health, cycles and alarm history from the app or portal. Without that record, a second life is hard to prove.
• Switch off as the manual says, and never open a module.
• Check for damage. A swollen, hot, leaking or smelling module is treated as damaged. It needs different packaging and transport.
• Store it safely until collection. Keep it away from heat, water and knocks, and away from flammable or conductive materials.
• Ask for the proof. After each Bebat collection, the requester receives a certificate of collection by e-mail within a few working days.
• Tell the grid operator. Fluvius checks the connection when a storage system is installed or removed, and you report it in Mijn Fluvius. In Wallonia, ORES treats adding or removing a battery as a modification of your production installation.

Bebat treats batteries above 25 kg as large batteries, with strict rules for storage and transport, and names home batteries in that group. It has its own packaging for large batteries in undamaged, defective or critical condition, and its collector calls within five working days of a request.

Installing a new battery at the same time? It needs its own notification and inspection, as our article on registering a home battery explains. Installers find the removal from their side in our article on what to do with removed batteries and inverters.

What happens to a home battery at the recycling plant?

The battery is checked, screened, taken apart and shredded, and its materials go back into the loop. This is how it runs in our Battery Disassembly Center.

• Intake and reception of damaged cars, e-bikes, lithium batteries and smaller lithium applications.
• Removal and check. We determine the type and features of the battery, assess its condition and check how far the cells are damaged. If needed, we add safety measures.
• Screening. A suitable battery can go to second-life applications. If not, it is end of life after the measurements.
• Safe disassembly by specialists, following clear instructions.
• Shredding. The machine separates copper, aluminium, heavy carbon and black mass.

The loop also closes at the other end. From 18 August 2031, new industrial batteries above 2 kWh must contain recycled material. The minimum shares are 16% cobalt, 85% lead, 6% lithium and 6% nickel. How each chemistry is processed, and why LFP differs from NMC, is explained in our article on how LFP, NMC and LTO batteries are recycled.

What should you ask about the end of life when you buy a premium home battery?

The easiest end of life is the one you plan on the day you buy. Five questions save you trouble later.

The passport and the other duties of the EU Battery Regulation are explained in our article on the EU Battery Regulation. From 18 August 2027, companies that sell batteries must also run due diligence checks. These cover the cobalt, lithium, nickel and natural graphite inside.

How do we help when your home battery ages?

We look at the battery you have before we talk about a new one. Our team includes three certified battery experts.

1. Step 1: We read the battery data and check the settings, the state of health and any damage.
2. Step 2: If the battery is sound, we revise it, or carry out maintenance and repair work. The Battery-Box systems we install are modular and can be expanded.
3. Step 3: If a new battery is the better choice, we keep what can stay. In Lokeren, the owner's solar panels and inverters stayed in place, combined with a new 16 kWh battery. Large homes run on systems such as the 30.8 kWh three-phase full back-up in Kortenberg or the 30.8 kWh rack in Kampenhout.
4. Step 4: At the real end of its life, a lithium battery goes to recycling. Our Battery Disassembly Center is part of YouPower Recycling, where lithium batteries from cars, bicycles and home batteries are taken apart. Our home batteries with back-up come with a 10-year warranty on the permanence of power.