Oxfordshire
Solar panels in Henley-on-Thames, with the numbers shown.
About 6,480 kWh a year from 12 panels in Henley-on-Thames, £6,360 installed, with your system designed on a free 30-minute video call.
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What a roof in Henley-on-Thames can generate
From 36.1 kWh per kWp in December to 124.7 in July: a roof in Henley-on-Thames makes 3.5 times as much in its best month as in its darkest, and 1,019 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 40.4 |
| February | 52.9 |
| March | 88 |
| April | 114 |
| May | 123 |
| June | 122 |
| July | 125 |
| August | 111 |
| September | 95 |
| October | 65.9 |
| November | 46 |
| December | 36.1 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 1,019 kWh per kWp in Henley-on-Thames against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Henley-on-Thames 10% above it.
How Henley-on-Thames compares
Small towns rarely get published solar figures, so here are the numbers for Henley-on-Thames. It is one of 10 Oxfordshire towns we track, and it ranks 6th of 10 for solar yield, a town of 11,996 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,019 kWh per kWp a year, 2.79 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £912 of year one benefit, £247 of it from your own generation and £665 from export at 12p.
Every figure here assumes a clear, south-facing roof at 35 degrees. Yours will differ, which is what the free design call is for; until then, the calculator below tests panels, batteries and export rates on Henley-on-Thames' own yield.
Henley-on-Thames sits within South Oxfordshire, its local planning authority, and the House of Commons Library classes it 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.
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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.
The figures use PVGIS for the centre of Henley-on-Thames (51.53303, -0.90886), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
Connecting solar to the Henley-on-Thames network
Scottish and Southern Electricity Networks (SSEN) owns and runs the local electricity network in Henley-on-Thames, as part of its Southern England licence area.
What decides the paperwork is the inverter and battery output, not the number of panels. Up to 3.68kW per phase, a system follows G98: SSEN is notified within 28 days of commissioning and nothing has to be approved first.
A bigger inverter or battery output needs a G99 application in advance. SSEN says it can take up to 45 working days to issue a quotation for a generation connection above 3.68kW per phase and up to 50kW.
Sources: NESO DNO licence areas (3 May 2024); SSEN, micro-generation connections page, checked 25 September 2026. G98 vs G99, explained.
Beyond the panels: heating and car charging in Henley-on-Thames
A heat pump in Henley-on-Thames
Solar and a heat pump pull in opposite directions through the year: Henley-on-Thames' roofs make 1,120 kWh from November to February on a 12-panel system, and 3,060 kWh from May to August. The heating season leans on the grid, so off-peak rates do the heavy lifting.
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 Henley-on-Thames
From April to September, 68% of a Henley-on-Thames roof's yearly output arrives, peaking at about 790 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.
Renters and flat owners with private off-street parking can get 75% off a chargepoint and its installation, up to £500 per socket, until 31 March 2027 (gov.uk, checked 28 September 2026). The calculator above adds a 7.4kW smart charger from £1,100 installed.
Installed prices, the same in every town
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Henley-on-Thames
Guidance is nationwide, so the benchmarks hold in Henley-on-Thames: repair costs, service scope, and when the inverter is the real fault.
Common questions about solar in Henley-on-Thames
What could a roof in Henley-on-Thames generate?
PVGIS puts a roof in Henley-on-Thames at 1,019 kWh per kWp a year, 2.79 peak sun hours a day averaged across the seasons. A 12-panel, 6.36 kWp system makes about 6,480 kWh a year, most of it between April and September.
How much are solar panels in Henley-on-Thames?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Henley-on-Thames before a battery. What Henley-on-Thames changes is the return, about 6,480 kWh a year from that system, and your design call prices your actual roof.
Do I need permission from the DNO for solar in Henley-on-Thames?
Usually not in advance. SSEN, the network operator for Henley-on-Thames, only needs a G98 notification within 28 days of commissioning for systems up to 3.68kW per phase. Bigger inverter or battery outputs need G99 approval first. SSEN says it can take up to 45 working days to issue a quotation for a generation connection above 3.68kW per phase and up to 50kW. "See our DNO explainer.
How much can I earn from exporting solar in Henley-on-Thames?
With typical use and no battery, a 12-panel system in Henley-on-Thames exports about 5,544 kWh a year. At 12p per kWh that is roughly £665; a supplier paying more, or a battery that keeps more for the evening, changes the figure. See the export rates table.
Do solar panels work in winter in Henley-on-Thames?
Yes, at a lower level. PVGIS gives Henley-on-Thames 36.1 kWh per kWp in December and 40.4 in January, so a 12-panel system makes about 230 kWh and 260 kWh in those months, against 790 kWh in July. Winter output mostly covers daytime use rather than exporting.
How Henley-on-Thames compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Henley-on-Thames.
| Town | kWh per kWp a year | vs Henley-on-Thames |
|---|---|---|
| Henley-on-Thames | 1,019 | this town |
| Twyford | 1,021 | +2 kWh |
| Caversham | 1,025 | +6 kWh |
| Woodley | 1,021 | +2 kWh |
| Marlow | 1,026 | +7 kWh |
| Reading | 1,028 | +9 kWh |
| Winnersh | 1,017 | −2 kWh |
PVGIS v5.2 for each town centroid, identical assumptions throughout. A few kWh either way is weather-year noise; a spread beyond about 30 kWh per kWp is real geography.
Also for Henley-on-Thames: Solar panels in Henley-on-Thames from OVO Solar & Battery
Also near Henley-on-Thames
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Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
Microinverters, optimisers or a plain string inverter: who needs what
Shade and roof layout decide this. An honest triage of the three approaches.
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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 →Which homes suit a heat pump, and which need work first
The trial data says no property type is unsuitable. Design quality decides the outcome.
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.