Somerset
Solar panels in Keynsham, with the numbers shown.
Twelve panels (6.36 kWp) here make about 6,490 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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Keynsham's solar year
From 35.5 kWh per kWp in December to 126.1 in July: a roof in Keynsham makes 3.6 times as much in its best month as in its darkest, and 1,020 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 38.5 |
| February | 53.7 |
| March | 88.9 |
| April | 116 |
| May | 124 |
| June | 122 |
| July | 126 |
| August | 111 |
| September | 95.9 |
| October | 65.2 |
| November | 44.1 |
| December | 35.5 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
Against Great Britain as a whole: Keynsham makes 1,020 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Keynsham is 10% above it.
How Keynsham compares
Small towns rarely get published solar figures, so here are the numbers for Keynsham. It is one of 21 Somerset towns we track, and it ranks 11th of 21 for solar yield, a town of 20,584 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,020 kWh per kWp a year, 2.80 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £913 of year one benefit, £247 of it from your own generation and £666 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Keynsham's own PVGIS figure; change the panels, the battery or the export rate and it reruns. The design call replaces every assumption with your roof and your bills.
Bath and North East Somerset is the planning authority covering Keynsham, which the House of Commons Library classes as a small town.
The charger is in the installed price but left out of payback: charging savings depend on your mileage and tariff, which the design call models properly.
Your real roof and usage, worked through on a free 30-minute video call. Use the full form or leave three details below.
Price this for your roof
Three details. We call or text within one working day to book your free 30-minute design call, on video or by phone if you prefer.
Modelled for Keynsham at 51.41095, -2.49701 on PVGIS data, with imports valued at 26.32p/kWh and solar at £1,000 per kWp installed. Sources and assumptions: help page.
Who runs the grid in Keynsham
Keynsham sits in National Grid Electricity Distribution's South West England licence area, so NGED is the network operator (DNO) any solar panels or battery here are registered with.
G98 is the simple route. If the inverter, plus any battery, stays at or under 3.68kW per phase, NGED only has to be told within 28 days after the system is commissioned.
Anything bigger is a G99 case and is applied for first. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late.
Sources: NESO DNO licence areas (3 May 2024); NGED, guaranteed standards of performance table, checked 25 September 2026. G98 vs G99, explained.
Adding a heat pump or an EV charger in Keynsham
A heat pump in Keynsham
A heat pump does most of its work from November to February. Over those four months, 12 panels in Keynsham make about 1,090 kWh, against 3,070 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more than the roof.
The Boiler Upgrade Scheme, open in England and Wales, takes £7,500 off an air source or ground source heat pump, or £2,500 off an air-to-air unit. Homes on oil or LPG with no mains gas get £1,500 more until March 2027 (gov.uk, checked 28 September 2026).
Charging an EV in Keynsham
From April to September, 68% of a Keynsham roof's yearly output arrives, peaking at about 800 kWh in July on 12 panels. A car parked at home in daylight can soak up what the house, at around 70 kWh of daytime use that month, cannot.
If you rent, or own a flat, and have private off-street parking, the government chargepoint grant covers 75% of the cost, capped at £500 a socket, until 31 March 2027 (gov.uk, checked 28 September 2026). The calculator above prices a 7.4kW smart charger from £1,100 installed.
What the named kit costs, installed
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Keynsham
Faults, servicing and ageing inverters follow the same economics in Keynsham as anywhere else, and the guides below price them plainly.
Common questions about solar in Keynsham
What does a solar panel system produce in Keynsham?
Each kWp of panels in Keynsham makes 1,020 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,490 kWh, from about 230 kWh in December up to 800 kWh in July.
How much are solar panels in Keynsham?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Keynsham before a battery. What Keynsham changes is the return, about 6,490 kWh a year from that system, and your design call prices your actual roof.
Would a system in Keynsham need approval from the network operator?
Keynsham is on National Grid Electricity Distribution's network (South West England licence area). Systems up to 3.68kW per phase of inverter output follow G98: NGED is notified within 28 days of commissioning, with no approval needed first. Anything larger needs a G99 application before installation. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late. Our G98 vs G99 guide explains both routes.
How much can I earn from exporting solar in Keynsham?
With typical use and no battery, a 12-panel system in Keynsham exports about 5,551 kWh a year. At 12p per kWh that is roughly £666; a supplier paying more, or a battery that keeps more for the evening, changes the figure. See the export rates table.
Is solar worth it in Keynsham in winter?
It works, but the year is lopsided. 68% of a Keynsham roof's output lands between April and September; the four months from November to February give about 1,090 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Keynsham compares with its neighbours
Same satellite dataset, same assumptions, so the differences are real geography rather than modelling noise.
| Town | kWh per kWp a year | vs Keynsham |
|---|---|---|
| Keynsham | 1,020 | this town |
| Kingswood and Fishponds | 1,019 | −1 kWh |
| Bristol | 1,021 | +1 kWh |
| Bath | 1,018 | −2 kWh |
| Stoke Gifford | 1,010 | −10 kWh |
| Filton | 1,014 | −6 kWh |
| Frampton Cotterell and Winterbourne | 1,001 | −19 kWh |
Same PVGIS v5.2 query for every town. Small differences are within year-to-year weather; more than about 30 kWh per kWp apart is geography.
Also for Keynsham: Solar panels in Keynsham from OVO Solar & Battery
See a number before you speak to anyone
Answer a few questions about your roof and usage and see an instant solar and battery estimate. No email needed to see the result.
Further reading for Keynsham
Sourced, dated and written by us. The same ground we cover on your free call.
Are solar panels worth it in 2026? Here is the actual maths
Roughly £1,000 per kWp installed, offsetting electricity at 26.32p a unit. The real arithmetic.
Read the guide →How much a battery saves by charging on cheap night rates
What charging at 8.5p and using at 26.32p is actually worth over a year.
Read the guide →The main home EV chargers, compared on what actually differs
Eight popular UK home chargers on cable, connectivity, warranty and tariff integration.
Read the guide →Sizing a heat pump: what a proper survey covers
Sized by calculation, not by rule of thumb. What the survey covers, and what guessing costs.
Read the guide →The price cap explained, and what it does to solar payback
The cap limits unit rates, not bills. That changes what solar payback means.
Read the guide →NAPIT, NICEIC and competent person schemes: who tells building control about your solar
Solar work is notifiable. A competent person scheme means your installation team notifies, not you.
Read the guide →Get my free quote
Takes about two minutes. We call or text within one working day to book your free 30-minute video design call at a time that suits you. We design it around your roof and your numbers, and our MCS-certified, fully insured installation teams install it.