Motorised blinds are powered in one of two broad ways: by a battery, which is often rechargeable, or by a wired mains or low-voltage supply. Both can be reliable. The right choice depends less on which is “better” and more on the window, the size of the blind, the state of the room and how many blinds you are planning.
How battery-powered motors work
Battery motors carry their own power. Depending on the system, the battery may be built into the motor or sit in a separate, discreet pack near the blind. Many are rechargeable, either by plugging in a charger or through other charging arrangements offered on selected systems.
The main attraction is that no power cable has to be run to the window. That makes battery motors a natural fit for homes where the decorating is finished and nobody wants walls chased out for new wiring.
How mains-powered motors work
Wired motors take their power from the building's electrical supply, either directly or through a transformer for low-voltage systems. They have continuous power, so there is no battery to recharge.
Because the power has to reach the blind, wiring needs to be planned. That is straightforward in a new build or major renovation and more disruptive in a finished room.
Side by side
| Consideration | Battery | Mains / wired |
|---|---|---|
| New wiring needed | No | Yes, planned in advance |
| Best timing | Any time, including finished rooms | New builds, extensions, renovations |
| Ongoing task | Recharging or replacing batteries | None for power |
| Large or heavy blinds | Depends on the motor chosen | Often preferred where the motor requires it |
| Many blinds / high use | Possible, but more to charge | Often simpler long term |
| Electrician needed | Usually not | Yes, for new mains work |
When battery power tends to suit
- retrofitting motorised blinds into an existing home;
- finished rooms where new cabling would be disruptive;
- standard-sized blinds that a compatible battery motor can operate comfortably;
- one or two blinds rather than a whole-house scheme;
- simpler installations where the aim is convenience or removing cords.
When mains power tends to suit
- new builds and renovations where hidden wiring can be planned;
- larger or heavier blinds where the chosen motor needs a wired supply;
- projects with many blinds, where recharging each one would become a chore;
- high-use windows that are raised and lowered many times a day;
- schemes that will be integrated with a wider home-automation system.
What neither option decides
Power source is only one layer of a motorised blind. The motor still has to be sized for the blind, and the control method — remote, wall switch, app or automation — is a separate decision. Our Motorised Blinds Guide explains all four layers.
It is also not true that battery motors cannot operate large blinds, or that mains motors are always more reliable. Suitability depends on the specific motor, its torque and the blind it is paired with. We confirm that for each window at survey.
How long does a battery last?
There is no honest single answer. It depends on the motor, the battery, the size and weight of the blind, how often it is used and even the temperature of the room. We would be cautious of any universal figure. What matters more is knowing where the charging point is and building recharging into your routine — see How to Look After Motorised Blinds.
Planning ahead
If you are building or renovating, decide early whether you want wired blinds, even if you are not ready to order them. Power in the right place is far easier to install before plastering. If in doubt, planning for wiring keeps both options open.
If your home is finished and you want motorised blinds now, battery power is usually the practical route, and it can still give an excellent result on a well-matched system.
We talk through power, control and the number of blinds on a free home survey, so the motor is chosen for the window rather than the other way round.
Frequently asked questions
Is battery or mains more reliable?
Both can be reliable when properly matched to the blind. Most battery “failures” are simply flat batteries; most wired problems relate to installation or control setup.
Can I switch from battery to mains later?
Sometimes, depending on the motor range. It is usually easier to decide at the start, especially if wiring would need to be hidden in walls.
Do I need an electrician for battery blinds?
Usually not. New mains electrical work should be carried out by an appropriately competent person.
Can battery and mains blinds be controlled together?
Often, if they are from a compatible system and use the same control or hub. This should be confirmed before ordering.