Battery Storage Cost London
Battery storage cost fitted, with the inverter
A battery has to talk to a hybrid inverter. Most quotations leave that out; this one does not.
Rated 5.0 on Google- £4,515From, 5 kWh with the inverter
- £6,555A real two battery job
- 0%VAT until March 2027
- 15 kWhStacks in 5 kWh units
Accredited, and fitting the brands you know
Batteries and solar we have fitted
Our own installations, photographed on the day.
Heat pump and solar
N21
Winchmore Hill
Air source heat pump with roof-mounted solar
The panels sit across the rear pitch and the heat pump at the side of the house, which is the pairing that lets the pump run on its own generation through the middle of the day.
Read the case study
Heat pump, solar and battery
N15
Tottenham
Air source heat pump with solar and battery storage
The whole electrical side on one wall: inverter, battery modules and every isolator in reach, with the conduit dressed in straight runs so a fault years from now can be traced without stripping the wall.
Read the case study
Solar
SW19
Wimbledon
Solar panels on a brick wall and on the roof
Some panels flat against a brick wall on black rails, the rest in a row along the roof slope with bird spikes along the lower edge and every frame bonded to earth.
Read the case study
Solar and battery
NW2
Cricklewood
Solar panels on ballasted frames, flat roof
Low-tilt frames standing on the pebble finish of a new-build flat roof and held down by weight, so nothing is fixed through the waterproofing, with a clear strip left along the parapet to walk and work from.
Read the case study
Solar
TW8
Brentford
Roof-mounted solar array
Two panels on the slate roof of a single-storey extension, each with its own microinverter, and bird mesh clipped round the edge so nothing can nest underneath.
Read the case study
Solar
SE20
Anerley
Solar panels on ballasted trays, flat roof
Six panels on the flat dormer roof, tilted on weighted trays rather than bolted down, so the roof covering is not pierced anywhere and the array still faces the sun instead of lying flat.
Read the case study
Heat pump and battery
HP1
Hemel Hempstead
Samsung heat pump with Tesla Powerwall
Heat pump and battery on the same elevation, so the pump can be run off stored generation through the evening peak instead of off the most expensive electricity of the day.
Read the case study
Heat pump, solar and battery
N4
Finsbury Park
Vaillant air source heat pump with solar panels and a battery
The panels on the roof run the heat pump through the day and the battery carries it into the evening, so the house buys far less from the grid. The unit sits on raised feet against the rear wall.
Read the case study
Solar and battery
NW2
Cricklewood
Fox ESS hybrid inverter and CQ7 battery
The battery stands outside on the roof terrace on its own paving base, which these IP65 rated LFP modules are built for, with the inverter and the isolator on the wall above it and the cables dropped in one enclosed run.
Read the case study
Solar
SE20
Anerley
Solar panels on a tiled pitched roof
The rest of the same array on the tiled slope, laid out around the two roof windows rather than over them, so the loft rooms keep their daylight.
Read the case study
Solar
SE20
Anerley
DC cabling in galvanised steel conduit
The cables from the roof brought down the rendered wall in galvanised steel conduit, clipped in straight runs into a junction box, instead of loose cable tied to the downpipe.
Read the case study
Your estimate
£4,500to£5,350
Supplied, fitted and commissioned, including the hybrid inverter and MCS certification. 0 per cent VAT until 31 March 2027.
Send this on WhatsAppPrice a battery
One unit is 5 kWh. Above three of them it stops being a size you pick off a list and becomes a design, so it is not on here.
Last step: what number should we call with your fixed price?
Every figure on this site is an estimate built from the quotations we issued in 2026 and our own installation experience. It is not a quotation. The price you are given after the free survey is the price you pay.
What goes into a battery price: every line, at our rates
The inverter is the line people are surprised by, and it is the reason two quotations for the same battery can differ by two thousand pounds.
One 5 kWh battery with the hybrid inverter it needs and the MCS certification is £4,515 to £5,349. Each further 5 kWh adds £2,040 to £2,335.
A real two battery quotation, with the inverter and certification, came to £6,555. Reconstructing it from the rates below gives £6,555.
| Item | Goods | Fitting |
|---|---|---|
| Fox ESS EP5, 5 kWh | £1,050 to £1,235 | £990 to £1,100 |
| Tesla Powerwall 3, 13.5 kWh | £7,295 | £1,500 |
| Hybrid inverter, if you do not have one | £650 to £689 | £1,100 to £1,500 |
| MCS certification | None | £725 to £825 |
The Fox ESS EP5 carries a warming function, which is what makes an outdoor or garage position workable in a London winter without losing capacity.
What the price includes. Nothing added later.
Everything below is inside the figure.
- The hybrid inverterA battery cannot be bolted onto a string inverter. If you already have a hybrid, the price drops by the inverter line; if you do not, it is in the figure rather than added later.
- MCS certificationRegistration NIC-601634, and the DNO notification that goes with connecting storage to the grid.
- Working with what you haveIf there are already panels, we design around the existing array rather than replacing it. If there are none, a battery still pays on a cheap overnight tariff.
Questions people actually ask
Can I have a battery without solar panels?
Yes. It charges overnight on a cheap tariff and discharges through the expensive part of the day, which is a real saving on its own before a single panel is fitted.
It also gives you something during a cut, if the system is specified with a backup gateway.
How big a battery do I need?
Five kWh suits a flat or a two bedroom house with no heat pump. Ten is the common answer for a three or four bedroom house. Fifteen starts to make sense once there is a heat pump, air conditioning or an EV in the house.
Above about fifteen it stops being a size you pick off a list and becomes a design, so we work it out from your half-hourly consumption rather than guessing.
Does a battery help with air conditioning?
More than most people expect. Air conditioning runs hardest in the late afternoon and evening, which is exactly when the panels are fading and the tariff is at its peak.
Storing the middle of the day and spending it at six in the evening is the difference between cooling being cheap and cooling being something you hesitate over.
A battery works harder with something to store
Panels fill it in the day, and a heat pump is the load it saves most on.
The survey is free and the written price is fixed
We measure the property, tell you what it needs and put a price in writing that does not move.
Monday to Friday 9am to 7pm, Saturday 10am to 3pm, Sunday closed
Page updated