Rear Drive Unit Under a Folding Chair
A drive unit fitted beneath the seat takes much of the pushing away from the carer.
A wheelchair power assist for caregivers is a motor unit that fits a manual chair and does much of the pushing for the carer. Compare the options below, then open Read More for unit types, hills, fitting and when a powered chair makes more sense.
Pushing a manual wheelchair on flat, smooth pavements is manageable for most carers. Add a steep hill, a long walk to the shops, a grassy park or a passenger who is heavier than the carer, and it quickly becomes exhausting. A wheelchair power assist for caregivers is a small motor unit that attaches to an ordinary manual chair and does much of the pushing, while the carer walks behind, steers and controls the speed.
This guide looks at how these attendant power packs work, the main types sold in the UK, what they can and cannot do, and when a fully powered chair might be a better answer.
A power pack is a battery-driven motor that clips or bolts onto a manual wheelchair. The carer controls it from a small unit on the push handle, usually with a dial or throttle to set speed and a lever or button to go. When the carer lets go, the pack stops and the chair can be held with the usual brakes. Most packs can be removed in a few moments, leaving the chair to fold and travel as normal.
The important point is that the carer still walks with the chair and steers it. The pack takes away the effort, not the job of guiding the chair safely.
The most common design is a compact unit with one or two small drive wheels that sits on the ground beneath the back of the chair, clamped to the frame’s cross bar or axle. It pushes the chair along from behind. These units are usually light enough to lift on and off, and they suit a wide range of folding chairs.
Other systems fit motors to the rear wheel hubs or replace the rear wheels with powered ones. These tend to be heavier and more expensive, and are often set up for a specific chair, but they can give smooth, even power on both sides.
Some power assist systems can be operated either by the carer or by the user, for example through push-rim sensors. They blur the line between a carer aid and a power add-on for independent users, so be clear about who will actually be using the controls.
In many cases, yes, but not every chair is suitable for a power assist for a manual wheelchair. Power pack makers usually publish a list of compatible frames or ask for measurements such as the width between the rear frame tubes and the axle position. Very lightweight chairs, unusual frames and older chairs may not take a clamp securely. Ask the supplier to confirm the fit for your exact chair before ordering, and check whether fitting the pack affects the wheelchair’s warranty.
If you do not yet have a chair, an attendant propelled wheelchair built for carers may make a good base.
Hills are where a power assist makes the biggest difference. Instead of leaning your full weight into the handles, the motor holds a steady speed up the slope. Going downhill, many units provide some braking effect, but carers should still be ready to use the chair’s own brakes or attendant brakes on the handles.
Kerbs are a different matter. A power pack does not climb kerbs; the carer still needs to tip and lift the chair, or use a dropped kerb. On grass and gravel, small drive wheels can lose grip or dig in, so check what surfaces the manufacturer suggests the unit is designed for. Anti-tip bars can interfere with some rear drive units, so check how the two work together; our page on anti-tip bars for wheelchairs explains their role.
It helps to picture the routes where pushing currently becomes a struggle. Common examples include a steep road between home and the bus stop, a hilly town centre, long corridors in a hospital or a riverside path that goes on for longer than the carer can comfortably manage. If the difficulty is limited to a few particular places, a power pack can be switched on only where needed and left idle the rest of the time, saving battery and keeping the chair quiet.
Think too about the passenger. Someone who is used to being pushed at a gentle pace may find a motorised start feels abrupt at first, so take early trips slowly and talk through what is happening. A compact lightweight transit wheelchair paired with a small rear drive unit is a popular combination for carers who want easy car travel as well as help on hills.
Most attendant power packs use a small rechargeable battery, often lithium, that clips onto the unit or the chair frame. The battery can usually be charged separately, which is useful if the chair lives in the car. Range depends on hills, the passenger’s weight and the surfaces you use, so treat any quoted figure as a best case and plan outings with a margin.
Weight matters twice: once for lifting the unit on and off, and once for the extra load in the car boot. If the carer will be fitting the pack alone, check the weight of each separate part.
Ask for the pack to be fitted and demonstrated, and practise in a quiet, flat place before heading out. Learn how to start gently, how to stop, how to switch to freewheel if the battery runs out and how to remove the unit quickly. Always keep both hands on the handles when the motor is running, and set a speed that matches your normal walking pace rather than rushing.
An attendant power pack keeps the lightness and portability of a manual chair, which suits families who travel by car or who only need help on certain routes. It is less suitable when the carer struggles with steering itself, when routes include lots of rough ground, or when the passenger would benefit from driving independently some of the time.
In those cases, a powered chair with attendant controls may be a better fit. Our guide to the attendant controlled electric power wheelchair compares that route.
Pushing a wheelchair every day is physically demanding, and carers often neglect their own health. If you care for someone for many hours each week, you may be entitled to support. GOV.UK explains the conditions for Carer’s Allowance, and a carer’s assessment from your local council can look at equipment and help that might make caring easier.
For many carers, a power assist turns outings that felt daunting back into something to look forward to. Check compatibility, try the unit on your own routes where you can and choose a system that you can fit and remove without strain.
A drive unit fitted beneath the seat takes much of the pushing away from the carer.
Designed around the user’s own pushes, hub-motor wheels need checking for a carer option.
A front attachment is steered by the seated person, which suits some families better.
Attendant packs on transit chairs are a popular choice for carers facing hills.
If you are the one lifting it, compare a front unit’s bulk with a rear unit’s.
Ask whether a carer control can be added later to a rear unit with a remote.
Taking the drive unit off leaves a normal folding chair for the car boot.
Handle-mounted controls keep speed and braking under the carer’s thumb.
As a carer, think about how you will charge the battery after each trip.
Carers gain little from motor wheels on a rigid frame, which are built for users who push themselves.