Fitting, replacement and upgrades · SL9

Battery backup and safety upgrades in Chalfont St Peter

We replace safety edges and photocells on electric roller garage doors in Chalfont St Peter, so the door stops or reverses when something is in its path. Homes in SL9 postcodes get the price confirmed before the visit is booked.

Request a visit Call 0800 088 6248

Guide price: from £99 inc VAT
First step: Visit price agreed first
Covers: Chalfont St Peter, SL9 and HP8
Area: Buckinghamshire

Roller door control box and battery backup unit mounted on a garage wall

Computer-generated image

What should I know about battery backup and safety upgrades in Chalfont St Peter?

Photocells mounted either side of the opening stop the door closing while anything is breaking the beam.
A battery backup unit lets the door run for a limited number of cycles when the mains power is off.
We check your motor and control box are compatible with the upgrade before the visit is booked, not on the day.
Where a door has never had photocells, any extra wiring needed is priced before we come out.

How does it work in Chalfont St Peter?

Tell us about the electric roller door at your home in Chalfont St Peter and the upgrade you're interested in. The make of the motor or control box helps us check compatibility.

STEP 01
Tell us about the door
Describe the door and what you need, with a photo or video if you can.
STEP 02
Agree the visit price
We confirm the visit price before anyone comes out.
STEP 03
Visit
The engineer finds the cause and makes the door safe where possible.
STEP 04
Parts quoted first
Any parts are quoted before they are fitted, so you decide.

How much do battery backup and safety upgrades cost in Chalfont St Peter?

Item	Guide price (inc VAT)	Ex VAT
Battery backup unit, fitted to an existing electric door	£149–£279	£124.17–£232.50 + VAT
Safety edge replacement, fitted	£159–£295	£132.50–£245.83 + VAT
Photocell pair replacement, fitted	£99–£189	£82.50–£157.50 + VAT

Guide prices for homes, last reviewed 25 October 2026. Your written quote is the price. See the full price list.

Covering Chalfont St Peter and nearby

If your garage is in Chalfont St Peter (SL9 and HP8), you can get a guide price online now, and we confirm any survey or visit date in writing. Chalfont St Peter lies around 18 miles from Aylesbury.

Nearby, we also take enquiries from Gerrards Cross, Rickmansworth and Amersham.

Rules that apply in Chalfont St Peter

Powered door safety

Every powered door we fit is commissioned with force testing to BS EN 12453 and handed over with a Declaration of Conformity and UKCA or CE marking, as the Supply of Machinery (Safety) Regulations 2008 require.

Electrics

An electric door needs a power supply near the roller box. Electrical work must meet BS 7671, and in England some domestic electrical work is notifiable under Part P, so it is done by a registered competent person or signed off by building control.

Battery backup and safety upgrades in Chalfont St Peter: questions

How much is a visit in Chalfont St Peter?

Prices for battery backup and safety upgrades start from £99 inc VAT, and the price is agreed before anyone comes out. Any parts not covered by that price are quoted before they are fitted, so you can decide on the spot. The guide prices are the same in Chalfont St Peter as elsewhere we cover.

Will you fix the door on the first visit?

A fault can sometimes be found and put right on the first visit, but we never promise it. If a part needs ordering, we quote for it first, make the door safe where we can, and confirm the return date in writing.

What should I do while I wait for a visit in Chalfont St Peter?

If the door is stuck part-open, keep people, pets and cars clear of it and switch off the power at the isolator if it is safe to reach. Do not force the curtain or open the roller box. Your Chalfont St Peter visit date is confirmed in writing.

Can I get a price for Chalfont St Peter without anyone visiting?

Yes. The guide price tool takes four steps and gives a range for your opening and door type. It is a guide, not a quote: the written quote comes after the survey or once the visit price is agreed.

Can safety devices be added to an older electric door?

Usually, if a compatible safety edge or photocells are available for the control box. Some older systems need extra wiring or a replacement control box first. Tell us what's on the control box label and we'll confirm whether it can be done, and the price, before booking the visit.

How often should I test the safety edge and photocells?

Test them monthly, following the manufacturer's instructions for your door. The aim is to confirm that the door stops or reverses when the safety edge meets an obstruction, and won't close while the photocell beam is broken. If either test fails, don't keep using the door until it has been checked, and request a visit.