Places · Street note
Home battery installation in Exeter
Updated
Exeter has a compact centre, student lets and a ring of family housing. Owner-occupied houses with roofs and garages are the battery market.
The houses, not the postcode average
Short-let terraces are not. The better southern yield in Devon rewards a clear roof. Shaded valley streets do not get that reward automatically.
NGED connection timing should be booked before a customer is promised an April install.
Centre streets are tighter than the estates.
What gets fitted here
Solar and a mid-size battery on a family house, sometimes with a charger, is the standard brief.
Devon is milder and still seasonal for PV.
National Grid Electricity Distribution, yield and a 4 kWp example
A 4 kWp array at 1040 kWh per installed kilowatt is about 4,160 kWh a year before shade. That is the local ceiling on solar charging, not a promise the battery will cycle fully in January.
In Exeter, on National Grid Electricity Distribution, 3.6 kW is in the band where G98 connect-and-notify is often enough. Export can still be capped. Agree that before the inverter is ordered. The figure uses 10 kWh and 4 kWp, which is enough to tell two quotes apart if they assumed something else.
Take a 10 kWh pack, cycled about 300 times, at 90% round trip. Charge at 11.0p, and value what comes back at 28.4p. Export given up is priced at 8.0p. About 1714 kWh a year of the charge is treated as spare solar from 4 kWp that might otherwise have been exported. Delivered energy is about 2700 kWh. After charging cost and lost export, the figure saves about £516 a year. Set that against £6,949 fitted, which is a September 2026 illustration at the temporary 0% residential rate, not a quote. That is a simple payback of about 13.5 years on these assumptions. Nudge the night rate up by 4p and see if you still like it.
What I would not sign in Exeter
Where the job is a qualifying install in a home, the 0% rate runs to 31 March 2027 and is due to become 5% after that. This figure prices the work at £6,949 on that basis. It does not apply to a shop, and it does not apply to a battery you buy and fit yourself.
I would not treat backup as included on a 10 kWh quote unless the circuits are listed.
Devon yield is kind on a clear roof and irrelevant if the inverter choice is wrong.
Common questions
Is the price on this page a quote?
No. £6,949 is a September 2026 illustration for a 10 kWh example at the temporary 0% residential rate. Your survey replaces it.
Will it stay on in a power cut?
Only if a gateway or essential-load board was designed and paid for. A standard grid-tied battery turns off with the grid. On this 10 kWh example the inverter is 3.6 kW, and backup is still a separate line.
What paperwork should I keep?
Keep the MCS certificate where the job is certified, the electrical certificate, the DNO record, the schematic, the warranty registration and a photo of the schedule. For an illustrated £6,949 job, that folder is part of what you bought.
What if the cheap rate is not 7p?
Then the figure changes. This page used 11.0p as a charge rate and 28.4p as the rate avoided. A smaller gap means a worse payback. Read the live tariff.
Sources
Want a price for your house?
The figures above are a rough guide. An installer still needs to see your fuse board, where the battery will go, and whether you want power during a blackout.