Rear Drive Unit Under a Folding Chair
A drive unit under the seat does the pushing while the carer steers from behind.
A power assisted wheelchair with carer controls can take the strain out of pushing. This guide looks at attendant power assist from the helper’s side, covering hills, braking on descents and choosing built-in or add-on drive.
A power assisted wheelchair provides motor propulsion that takes the physical strain off attendants pushing on steep routes. Yet in many households the person who struggles most is the one behind the chair: a partner, a son or daughter, a friend or a paid carer who pushes every day. A power assisted wheelchair set up for the helper can make the difference between outings that feel possible and ones that get quietly dropped. This guide looks at the idea from the carer’s side, with particular attention to hills, braking and choosing the right arrangement.
We keep things general. Products differ, and only the maker can tell you exactly how a particular chair or drive unit performs. Use the points below to frame your questions and to judge what you read in listings.
Attendant power assist is an add-on motor system regulated by handlebar controls to propel the manual frame effortlessly. It might be built into a purpose-made chair, or added to an existing attendant or self-propelled chair as a separate wheelchair motor attachment. Usually a small motor and battery sit beneath or behind the seat, driving one or two wheels, while a control on the push handles lets the carer start, stop and set a comfortable pace. The carer still walks behind and steers, but the motor takes over most of the pushing force.
In practice this means a carer can walk at a steady rhythm, uphill as well as on the flat, without leaning their whole body weight into the handles. For someone with limited stamina or simply a heavy passenger, that can change the whole feel of a day out. It differs from a user-driven power assist wheelchair, where the seated person controls the help through the push rims.
Electric drive motors generate continuous torque so carers can guide loaded wheelchairs up steep slopes without strain. Pushing a loaded chair up a long slope is hard work even for fit people, and it becomes risky if the carer tires halfway. With a drive unit supplying the force, the carer’s role shifts to steering and keeping a steady walking pace.
Integrated motor braking restricts downhill speed automatically to prevent the chair from accelerating away on steep descents. Braking behaviour is therefore one of the most important things to understand before buying.
Many drive units slow the chair when the carer releases the control, and some hold the chair in place on a slope. Others rely more on the carer and the chair’s own brakes. Ask the supplier plainly what happens on a descent and when the carer lets go.
Find out whether the unit holds the chair when stopped, and always apply the chair’s wheel locks when parked, following the maker’s instructions.
Learn how to disengage the drive so the chair can be pushed manually if the battery runs flat, and practise re-engaging it.
Carers can take two broad routes to a power assisted chair.
Some chairs come with the drive system integrated. The chair is designed around the motor and battery, which can make for a tidy, well-balanced package. The downside is that you are buying a whole new chair.
Many units, sold under names such as wheelchair power pack or power add on for wheelchair frames, are designed to fit a range of manual chairs. This keeps a chair the passenger already finds comfortable, and the unit can often be removed for car travel. The key question is compatibility with your specific frame. Our guide on choosing a wheelchair power add-on covers what to check.
A carer running low on battery halfway up a hill is in a worse spot than a user in a powered chair, because the fallback is pushing a heavy loaded chair by hand. So battery planning deserves some thought. Charge fully before each outing according to the maker’s guidance, and check the charge indicator before setting off. If the indicator is on the handle control, glance at it at natural pauses. Aim to finish with charge to spare rather than squeezing out every last bit, especially if the return leg is uphill. Where the battery can be lifted off, ask whether a spare is available and whether it is light enough to carry in a bag.
Power assistance is usually most useful outdoors, but think about the indoor parts of a trip too. In shops, cafés and lifts, a slow, controllable setting matters more than pulling power. Some carers switch the drive off entirely indoors and push manually for fine positioning. Ask whether the unit adds length behind the chair, as that affects turning in narrow aisles and fitting into lifts.
Assisted propulsion reduces pushing force, but the carer still walks, steers, lifts and manoeuvres. Think honestly about the whole job. Who will lift the chair and drive unit into the car? Who fits and removes the battery? Is the handle height comfortable, or do the handles need extending? If the carer has health problems of their own, it is worth asking a GP or physiotherapist for advice about what is sensible. The page on push handle extensions for taller carers may help with posture.
The passenger experiences every start and stop. A smooth, gradual acceleration feels far better than a jolt, so ask whether the system allows gentle starts. Agree simple signals: the passenger might want to pause, look at something or feel nervous on a slope. Remember that the passenger cannot see what the carer sees, so talk through kerbs, bumps and descents as you approach them.
If the passenger mostly sits in an attendant chair, the attendant wheelchair page explains that category, while our look at power wheelchairs is useful if you are wondering whether a fully powered chair would suit better.
Caring for someone can be physically and financially demanding. GOV.UK explains Carer’s Allowance, which may be available depending on circumstances. For advice on wheelchairs themselves, including assessment and possible funding through the wheelchair service, the NHS page on wheelchairs and mobility scooters is a good starting point.
The real test of a power assisted chair is whether it keeps outings going week after week without wearing the carer down. Choose a system that tackles your local hills, stops predictably, travels in your car and feels natural to steer. Then practise somewhere quiet, build confidence on gentle slopes, and let the motor do the heavy lifting so the carer can focus on the journey and the company.
A drive unit under the seat does the pushing while the carer steers from behind.
Motors in the rear hubs mainly help a self-propelling user, so check whether a carer control is offered.
A front attachment is driven by the user, not the carer, so it suits a different kind of help.
Built for helpers who struggle on hills, this attendant pack fits a transit chair.
Front units are usually steered by the seated user rather than a helper.
Rear drive units can be added to an existing chair; ask how they brake on slopes.
Removable drive units matter to carers who lift the chair into a car.
The handle-mounted control is the carer’s main contact with the motor, so try it on a slope.
Carers often handle charging too, so check how easy the battery is to take off.
Designed for people who push themselves, power wheels on a rigid frame are rarely the carer’s choice.