Kent
Solar panels in Longfield, New Ash Green and Hartley.
Twelve panels here make about 6,670 kWh a year for £6,360 installed, designed on a free 30-minute video call.
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What a roof in Longfield, New Ash Green and Hartley can generate
Longfield, New Ash Green and Hartley's best month is July, at 129.3 kWh per kWp; December manages 38. Over the year that comes to 1,049 kWh per kWp, 2% below our Kent county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 38.6 |
| February | 52.3 |
| March | 88.9 |
| April | 117 |
| May | 125 |
| June | 127 |
| July | 129 |
| August | 115 |
| September | 99.9 |
| October | 69 |
| November | 48.9 |
| December | 38 |
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 1,049, Longfield, New Ash Green and Hartley is 13% above it.
How Longfield, New Ash Green and Hartley compares
Small towns rarely get published solar figures, so here are the numbers for Longfield, New Ash Green and Hartley. It is one of 44 Kent towns we track, and it ranks 33rd of 44 for solar yield, a town of 16,123 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,049 kWh per kWp a year, 2.87 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £935 of year one benefit, £247 of it from your own generation and £688 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Longfield, New Ash Green and Hartley'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.
Longfield, New Ash Green and Hartley sits within Sevenoaks, 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 Longfield, New Ash Green and Hartley (51.38342, 0.31154), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
Connecting solar to the Longfield, New Ash Green and Hartley network
The distribution network operator (DNO) for Longfield, New Ash Green and Hartley 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.
Anything bigger is a G99 case and is applied for first. 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.
Adding a heat pump or an EV charger in Longfield, New Ash Green and Hartley
A heat pump in Longfield, New Ash Green and Hartley
Solar and a heat pump pull in opposite directions through the year: Longfield, New Ash Green and Hartley's roofs make 1,130 kWh from November to February on a 12-panel system, and 3,160 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 Longfield, New Ash Green and Hartley
From April to September, 68% of a Longfield, New Ash Green and Hartley roof's yearly output arrives, peaking at about 820 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.
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).
The packages, priced before anyone visits
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Longfield, New Ash Green and Hartley
Guidance is nationwide, so the benchmarks hold in Longfield, New Ash Green and Hartley: repair costs, service scope, and when the inverter is the real fault.
Longfield, New Ash Green and Hartley solar questions
What could a roof in Longfield, New Ash Green and Hartley generate?
PVGIS puts a roof in Longfield, New Ash Green and Hartley at 1,049 kWh per kWp a year, 2.87 peak sun hours a day averaged across the seasons. A 12-panel, 6.36 kWp system makes about 6,670 kWh a year, most of it between April and September.
How much are solar panels in Longfield, New Ash Green and Hartley?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Longfield, New Ash Green and Hartley before a battery. What Longfield, New Ash Green and Hartley changes is the return, about 6,670 kWh a year from that system, and your design call prices your actual roof.
Do I need permission from the DNO for solar in Longfield, New Ash Green and Hartley?
Usually not in advance. UK Power Networks, the network operator for Longfield, New Ash Green and Hartley, 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. 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. "See our DNO explainer.
How much can I earn from exporting solar in Longfield, New Ash Green and Hartley?
With typical use and no battery, a 12-panel system in Longfield, New Ash Green and Hartley exports about 5,735 kWh a year. At 12p per kWh that is roughly £688; 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 Longfield, New Ash Green and Hartley?
Yes, at a lower level. PVGIS gives Longfield, New Ash Green and Hartley 38 kWh per kWp in December and 38.6 in January, so a 12-panel system makes about 240 kWh and 250 kWh in those months, against 820 kWh in July. Winter output mostly covers daytime use rather than exporting.
How Longfield, New Ash Green and Hartley compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Longfield, New Ash Green and Hartley.
| Town | kWh per kWp a year | vs Longfield, New Ash Green and Hartley |
|---|---|---|
| Longfield, New Ash Green and Hartley | 1,049 | this town |
| Northfleet | 1,052 | +3 kWh |
| Gravesend | 1,053 | +4 kWh |
| Swanscombe | 1,041 | −8 kWh |
| Dartford | 1,039 | −10 kWh |
| Tilbury | 1,057 | +8 kWh |
| Swanley | 1,033 | −16 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 Longfield, New Ash Green and Hartley: Solar panels in Longfield, New Ash Green and Hartley from OVO Solar & Battery
Also near Longfield, New Ash Green and Hartley
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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.
G98 vs G99: the 28-day form and the eight-week wait, in plain English
One number on your quote decides between a formality and an eight week wait.
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 →Home EV charger types and speeds, explained properly
Granny cable, 7kW wall unit or 22kW three phase. What each adds per hour, and which you need.
Read the guide →Do you need to replace your radiators for a heat pump?
Some change, most do not. The room by room arithmetic that decides which.
Read the guide →Why tariff choice moves payback more than kit choice
Identical kit, five times the export income. The tariff decision worked through with August 2026 rates.
Read the guide →How to check an MCS certificate is genuine, before the deposit leaves your account
A logo proves nothing. Certification is business specific, technology specific and checkable.
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.