Northamptonshire, England
Solar panels in Northamptonshire, priced before anyone visits.
Twelve panels (6.36 kWp) here make about 6,470 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
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How much a Northamptonshire roof makes, month by month
Northamptonshire's best month is July, at 124.5 kWh per kWp; December manages 36.1. Over the year that comes to 1,018 kWh per kWp, 10% above the mean of our 85 county estimates.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 38.9 |
| February | 52.9 |
| March | 89 |
| April | 113 |
| May | 122 |
| June | 121 |
| July | 125 |
| August | 111 |
| September | 96.1 |
| October | 66.7 |
| November | 46.9 |
| 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.
Against Great Britain as a whole: Northamptonshire makes 1,018 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Northamptonshire is 10% above it.
How Northamptonshire compares
Northamptonshire ranks 17th of the 85 counties we track for solar yield, which puts export income near the top of the country. On the 12p scenario a 12 panel system here sends about 5,538 kWh to the grid a year on top of the £247 it saves you directly, so oversizing the array is usually the right call.
Every figure here assumes a clear, south-facing roof at 35 degrees in the middle of Northamptonshire. Yours will differ; the calculator below lets you test panels, batteries and export rates first.
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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Generation from PVGIS v5.2 (European Commission JRC, SARAH3), retrieved August 2026 for a representative point in Northamptonshire (52.3332, -0.8202), assuming 1 kWp, 14% system loss, 35 degree pitch, due south. Import valued at 26.32p/kWh (Ofgem price cap average, Oct to Dec 2026); off-peak charging at 8.5p/kWh where used (a supplier's published off-peak rate, checked September 2026); export at the scenario you pick, from the dated tariff table. Prices are installed pricing, August 2026, standard installations; 530W LONGi panels at £1,000 per kWp. Estimates for illustration, not a quote: your free design call prices your actual roof.
NGED and your Northamptonshire connection
National Grid Electricity Distribution (NGED) is the distribution network operator (DNO) for Northamptonshire across most of the county, running its East Midlands 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: NGED is notified within 28 days of commissioning and nothing has to be approved first.
Above that, G99 means applying before the work is booked. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late.
Parts of Northamptonshire are on a different network: some of its towns are served by UK Power Networks. Each town page names its own operator, worked out from that town's own location.
Sources: NESO DNO licence areas (3 May 2024); NGED, guaranteed standards of performance table, checked 25 September 2026. G98 vs G99, explained.
Beyond the panels: heating and car charging in Northamptonshire
A heat pump in Northamptonshire
Heating demand peaks when solar is weakest. In Northamptonshire, a 12-panel system makes about 230 kWh in December and 250 kWh in January, a fraction of its 790 kWh in July, which is why a heat pump here is costed on its tariff first.
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 Northamptonshire
Northamptonshire's July output, about 790 kWh from 12 panels, is several times the 70 kWh or so a typical home uses in daylight that month on our calculator's settings. Daytime charging turns that surplus into miles.
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 across Northamptonshire
Every system is designed around your roof on the free call before anything is fitted.
Common questions about solar in Northamptonshire
How much electricity do solar panels make in Northamptonshire?
About 6,470 kWh a year from 12 panels (6.36 kWp), on PVGIS satellite data for Northamptonshire: 1,018 kWh per kWp, or 2.79 peak sun hours a day on average. July is the strongest month, at about 790 kWh.
Is solar more expensive in Northamptonshire?
Prices on this site are the same everywhere: £1,000 per kWp installed, which puts a 12-panel system at £6,360 in Northamptonshire, and a Duracell Dura16 installed with solar at £4,450 on top. The local part is generation, about 6,470 kWh a year here, which is what drives payback.
Which DNO covers Northamptonshire, and what does it need from me?
National Grid Electricity Distribution (NGED) covers the centre of Northamptonshire. A home system of up to 3.68kW per phase is notified to NGED within 28 days of commissioning under G98, and nothing waits on approval. Larger outputs need a G99 application before work starts. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late.
What could I earn from exporting in Northamptonshire?
On the 12p export scenario, a 12-panel system in Northamptonshire sends about 5,538 kWh a year to the grid, worth around £665. The export rates table compares what each supplier pays.
How much solar does Northamptonshire get in December?
December is the low point: about 230 kWh from a 12-panel system in Northamptonshire, on PVGIS data, rising to 790 kWh in July. From November to February the same system makes about 1,110 kWh in total, which is why a battery charged off-peak does more of the work in winter.
Towns we cover in Northamptonshire
16 Northamptonshire towns have their own page, each with PVGIS figures, a network operator and a monthly curve for its own location.
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Reading for Northamptonshire homeowners
The same guidance we would talk through on your call, written down and sourced.
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 →Sigenergy SigenStor review: the 5-in-1 tower examined
The 5-in-1 tower reviewed by a site that does not sell it, warranty arithmetic included.
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 →How much does a heat pump cost? The 2026 numbers, before and after the grant
UK median installed cost around £12,908, before the up to £7,500 grant comes off.
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 →Your MCS certificate: what it shows, when it arrives, and how a Smart Export Guarantee supplier uses it
The document your export payments hang on. Who issues it, what it shows, and how to get a copy.
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.