A battery-powered stairlift uses mains electricity to charge its batteries, then draws on those batteries to move the chair. That is why it can continue working during a power cut, while it has enough charge.
Electricity is one part of the ongoing cost. Servicing, repair cover and any battery replacement need to be considered separately when you budget for ownership.
Battery-powered still means plugged in
The Acorn 130 user manual describes an internal battery pack charged from the household supply through a transformer. It also explains the charging positions for that model and its hinge arrangements.
At installation, ask the engineer to show you where your lift should be parked and how you can tell that it is charging. Follow the instructions for the particular model. A chair left away from a required charging point may not be ready for the next journey.
Keep the recommended supply switched on in normal use. Turning it off to save electricity can leave you with discharged batteries. If the home will be empty for an extended period, ask the supplier for its storage instructions.
How much electricity will it use?
Ask for an energy-use estimate for the proposed model and the assumptions behind it. The staircase, number of journeys and time spent charging all matter to the estimate you are being given.
Use kilowatt-hours, or kWh, to calculate the bill. A motor or charger's wattage is a power rating; it is not, on its own, a measurement of what the complete installation uses over a day. Multiplying that rating by 24 hours can give a misleading answer.
Stannah's running-cost article gives an example of around £1 a month, but explicitly bases that price illustration on September 2024 electricity prices. It should not be treated as a current quotation for your home.
For a useful comparison, ask whether the supplier's energy estimate includes charging losses and electricity used while the lift is parked, as well as journeys. Then apply the unit rate on your own electricity bill.
A simple way to check an estimate
Electricity cost = energy used in kWh × your price per kWh.
For illustration only, suppose a complete installation used 0.1kWh a day and your tariff was 30p per kWh. The calculation would be 3p a day, or £10.95 over 365 days. The energy use and tariff here are chosen to show the arithmetic; they are not a measured stairlift result or a quoted October 2026 electricity rate.
Replace both figures with information for your lift and tariff. If the supplier gives an annual kWh figure, multiply that by your unit rate instead. Your household's usual electricity standing charge is separate from this calculation of additional usage.
What happens during a power cut?
For a battery-powered model, the remaining charge provides a limited number of journeys while mains charging is unavailable. The lift does not have an unlimited reserve just because it still moves when the power goes off.
Stannah's UK FAQ describes at least eight return journeys from fully charged batteries in an average household. Treat that as the manufacturer's stated example, not a guaranteed allowance for every model, battery condition or staircase.
Ask about powered options as well as the chair's travel. The same FAQ says a powered swivel may require use of the manual swivel lever during a power cut. Have the supplier demonstrate the correct arrangements for your installed lift and make sure the intended user understands them.
If the user depends on the lift to reach essential rooms, discuss what to do during a prolonged outage before it happens. Keep the service contact details accessible and seek the provider's advice if you are unsure how the lift is behaving.
Allow for maintenance as well as electricity
Ask what cover applies to the main stairlift batteries and what a replacement would cost if it were needed outside that cover. Do not assume batteries in the hand controls have the same terms as the pack that drives the chair.
A low electricity estimate does not include a future service visit or an unexpected repair bill. Our servicing and breakdown-cover guide explains how to compare those arrangements.
Before buying, request the installed total, included aftercare, model-specific charging instructions and any available energy estimate. You can use our stairlift price guide for purchase-price context and the quotation checklist to compare offers.
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