Kent
Solar panels in Tonbridge, sized to your roof.
Twelve panels (6.36 kWp) here make about 6,680 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
Tonbridge's solar year
Tonbridge's best month is July, at 130.2 kWh per kWp; December manages 38.7. Over the year that comes to 1,051 kWh per kWp, 2% below our Kent county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39 |
| February | 52.9 |
| March | 88.8 |
| April | 118 |
| May | 125 |
| June | 128 |
| July | 130 |
| August | 116 |
| September | 98.9 |
| October | 68.5 |
| November | 48.1 |
| December | 38.7 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
Our GB average is 925 kWh per kWp a year, the mean of the 85 county PVGIS estimates we publish; at 1,051, Tonbridge is 14% above it.
How Tonbridge compares
Among the places we publish figures for, Tonbridge is one of 44 Kent towns we track, and it ranks joint 28th of 44 for solar yield. It is a medium town in the House of Commons Library classification, with 37,210 residents, and its roofs see 2.88 peak sun hours a day across the year. That drives the standard 12 panel model to 6,684 kWh of generation, of which around 5,748 kWh is exported at 12p for £690 a year, with £247 saved on electricity you would otherwise buy at 26.32p.
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 Tonbridge's own yield.
Tonbridge and Malling is the planning authority covering Tonbridge, which the House of Commons Library classes as a medium 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.
Generation is modelled from PVGIS satellite data for Tonbridge's own coordinates (51.19918, 0.28144), using the same 26.32p/kWh import value and £1,000 per kWp installed pricing as every Clearline estimate; the methodology is on our help page.
Who runs the grid in Tonbridge
The distribution network operator (DNO) for Tonbridge is UK Power Networks, which runs the South East England licence area.
G98 is the simple route. If the inverter, plus any battery, stays at or under 3.68kW per phase, UK Power Networks only has to be told within 28 days after the system is commissioned.
A bigger inverter or battery output needs a G99 application in advance. Ofgem's guaranteed standard for a low voltage generation connection quotation is 45 working days, with £80 paid for each working day late, and it binds UK Power Networks as it does every network operator.
Sources: NESO DNO licence areas (3 May 2024); Ofgem, Distributed Generation Standards Direction guidance, checked 27 September 2026. G98 vs G99, explained.
Beyond the panels: heating and car charging in Tonbridge
A heat pump in Tonbridge
A heat pump does most of its work from November to February. Over those four months, 12 panels in Tonbridge make about 1,140 kWh, against 3,170 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 Tonbridge
A 12-panel roof in Tonbridge makes about 830 kWh in July. A typical home uses around 70 kWh of that in daylight (the calculator's typical-use settings), which leaves most of the month's output for an EV or for export.
The calculator above includes a 7.4kW smart charger from £1,100 installed. Renters and flat owners with off-street parking can claim 75% of a chargepoint's cost, up to £500 per socket, until 31 March 2027 (gov.uk, checked 28 September 2026).
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 Tonbridge
Faults, servicing and ageing inverters follow the same economics in Tonbridge as anywhere else, and the guides below price them plainly.
Common questions about solar in Tonbridge
What does a solar panel system produce in Tonbridge?
Each kWp of panels in Tonbridge makes 1,051 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,680 kWh, from about 250 kWh in December up to 830 kWh in July.
How much are solar panels in Tonbridge?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Tonbridge before a battery. What Tonbridge changes is the return, about 6,680 kWh a year from that system, and your design call prices your actual roof.
Would a system in Tonbridge need approval from the network operator?
Tonbridge is on UK Power Networks' network (South East England licence area). Systems up to 3.68kW per phase of inverter output follow G98: UK Power Networks is notified within 28 days of commissioning, with no approval needed first. Anything larger needs a G99 application before installation. Ofgem's guaranteed standard for a low voltage generation connection quotation is 45 working days, with £80 paid for each working day late, and it binds UK Power Networks as it does every network operator. Our G98 vs G99 guide explains both routes.
How much can I earn from exporting solar in Tonbridge?
With typical use and no battery, a 12-panel system in Tonbridge exports about 5,748 kWh a year. At 12p per kWh that is roughly £690; 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 Tonbridge in winter?
It works, but the year is lopsided. 68% of a Tonbridge roof's output lands between April and September; the four months from November to February give about 1,140 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Tonbridge compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Tonbridge.
| Town | kWh per kWp a year | vs Tonbridge |
|---|---|---|
| Tonbridge | 1,051 | this town |
| Southborough | 1,051 | level |
| Royal Tunbridge Wells | 1,054 | +3 kWh |
| Paddock Wood | 1,071 | +20 kWh |
| Rusthall and Langton Green | 1,051 | level |
| Sevenoaks | 1,043 | −8 kWh |
| Kings Hill | 1,059 | +8 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 Tonbridge: Solar panels in Tonbridge 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.
Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
What a solar service costs, and how often you actually need one
MCS advises a contractor visit at year 10 on a privately owned home. Most plans sell one a year.
Read the guide →Adding a battery to solar panels you already own
Retrofitting a battery to working solar is straightforward. The paperwork is where people trip up.
Read the guide →What it really costs to charge an EV at home versus in public
Home off-peak charging costs a fraction of the public price. The arithmetic, and the tariff it depends on.
Read the guide →Are air source heat pumps any good? What owners actually report
The UK's largest survey found 80% of heat pump owners satisfied, against 70% for gas boilers.
Read the guide →What the Smart Export Guarantee actually is
The scheme obliges suppliers to pay above zero, and leaves the rate to them.
Read the guide →G98 or G99: which one applies, what the application involves, and how long it takes
The G98 line sits at 3.68kW per phase. Above it, your network operator has to say yes first.
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.