Where to place a home battery?

Where your home battery ends up matters more than you might think: it affects how safe the system is, what the installation costs and how long the battery lasts. Batteries like cool, dry and ventilated. Every spot that deviates from that costs you somewhere, in lifespan or in extra provisions.

On this page we walk through the rooms the way we do during a site survey, from shed to crawl space. Still choosing between systems and capacities? Read which home battery suits you first; this page is purely about the location.

For safety we follow the advice of the Dutch fire service (Dutch): place the battery in a cool, well-ventilated space, preferably the shed, otherwise the garage or the attic. Never hang it in your escape route, mount it on a non-combustible surface, fit a smoke detector in the same room and have the installation done by a certified installer.

That advice exists for a reason. In the rare case that a lithium battery does go seriously wrong, you do not want it hanging between you and the front door. That is why the hallway, the stairwell and the landing are out, however practical that spot next to the fuse box may seem.

In our installation practice, four locations come up again and again. This is how we weigh them:

In terraced houses without a shed or garage, the battery often goes in the attic, and that works fine. Do watch three things from practice. Under an uninsulated roof the temperature climbs steeply on summer days, while a battery prefers cool; a spot against an internal wall, away from the roof boarding, helps. The floor or wall must carry the weight. And the cable run to the fuse box gets longer, which factors into the price.

The crawl space looks attractive on paper, out of sight and close to the fuse box, but falls off in practice: it is damp, rarely frost-free and there is no non-combustible, load-bearing surface to mount on. It is also unsuitable for servicing and for the smoke detector. We do not install batteries there, and we would give you the same advice if you buy elsewhere.

Battery modules are heavy. The exact weight differs per system and is in the datasheet, but count on tens of kilos per module and more for stacked systems. The wall or floor must carry that: a brick wall or concrete floor almost always works, with plasterboard or a wooden attic floor we first check whether mounting is responsible or a floor-standing setup makes more sense.

The second fitting question is the distance to the fuse box. There is no hard maximum, but every metre of cable costs money and long runs lose power. So we always weigh the best room against the cable route: a detached shed far down the garden can easily end up more expensive than the garage attached to the house.

A home battery outside against the facade or in the garden only works with a system designed for it, with an enclosure that handles rain, frost and sun. Most home batteries are indoor units; hanging those outside usually voids the warranty. So check the specifications and warranty terms before counting on an outdoor setup, or ask us at the quote stage.

Wherever the battery goes: inform your insurer about the placement. That is fire service advice and it prevents discussion about cover afterwards. Some insurers set requirements for the location or the installation; better to know that upfront than during a claim.

During the site survey we walk through your home with this lens: where is it cool, dry and ventilated, what carries the weight, how short can the cable run be and does the escape route stay clear. That produces a location plus the matching configuration, including the question whether you want backup power, because a backup provision also means work in the fuse box.

You get a no-obligation quote within 24 hours and after approval we usually install within three weeks. Not sure whether your intended spot is suitable? Put your situation to us or browse the options on our home battery page first.