Lincolnshire
Solar panels in Grantham, sized to your roof.
About 6,440 kWh a year from 12 panels in Grantham, £6,360 installed, with your system designed on a free 30-minute video call.
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or call 07782 219224
- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
Grantham's solar year
From 35 kWh per kWp in December to 124 in May: a roof in Grantham makes 3.5 times as much in its best month as in its darkest, and 1,013 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 37.7 |
| February | 52.6 |
| March | 89.6 |
| April | 114 |
| May | 124 |
| June | 118 |
| July | 123 |
| August | 111 |
| September | 95.5 |
| October | 66 |
| November | 45.7 |
| December | 35 |
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 1,013, Grantham is 10% above it.
How Grantham compares
Among the places we publish figures for, Grantham is one of 22 Lincolnshire towns we track, and it ranks 16th of 22 for solar yield. It is a medium town in the House of Commons Library classification, with 45,356 residents, and its roofs see 2.78 peak sun hours a day across the year. That drives the standard 12 panel model to 6,443 kWh of generation, of which around 5,506 kWh is exported at 12p for £661 a year, with £247 saved on electricity you would otherwise buy at 26.32p.
These are starting numbers, not a quote. The calculator below opens on Grantham'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.
South Kesteven is the planning authority covering Grantham, 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 Grantham's own coordinates (52.91325, -0.64009), 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 Grantham
On NESO's licence-area map, Grantham is in East Midlands, which National Grid Electricity Distribution (NGED) operates. That makes NGED the network operator for any system fitted here.
Below 3.68kW per phase of inverter and battery output, the G98 route applies: the installation is notified to NGED within 28 days of commissioning, with no prior approval.
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 Grantham
A heat pump in Grantham
A heat pump does most of its work from November to February. Over those four months, 12 panels in Grantham make about 1,090 kWh, against 3,030 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 Grantham
A 12-panel roof in Grantham makes about 790 kWh in May. 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.
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 Grantham
Faults, servicing and ageing inverters follow the same economics in Grantham as anywhere else, and the guides below price them plainly.
Common questions about solar in Grantham
What does a solar panel system produce in Grantham?
Each kWp of panels in Grantham makes 1,013 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,440 kWh, from about 220 kWh in December up to 790 kWh in May.
How much are solar panels in Grantham?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Grantham before a battery. What Grantham changes is the return, about 6,440 kWh a year from that system, and your design call prices your actual roof.
Would a system in Grantham need approval from the network operator?
Grantham is on National Grid Electricity Distribution's network (East Midlands 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 Grantham?
With typical use and no battery, a 12-panel system in Grantham exports about 5,506 kWh a year. At 12p per kWh that is roughly £661; 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 Grantham in winter?
It works, but the year is lopsided. 68% of a Grantham 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 Grantham 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 Grantham |
|---|---|---|
| Grantham | 1,013 | this town |
| Sleaford | 1,031 | +18 kWh |
| Balderton | 1,000 | −13 kWh |
| Newark-on-Trent | 999 | −14 kWh |
| Bingham | 993 | −20 kWh |
| Melton Mowbray | 1,000 | −13 kWh |
| Bourne | 1,028 | +15 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 Grantham: Solar panels in Grantham from OVO Solar & Battery
Also near Grantham
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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 Grantham
Sourced, dated and written by us. The same ground we cover on your free call.
Solar installation day: exactly what happens, hour by hour
The week before, the day itself hour by hour, and the paperwork that follows.
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 →Smart charge point regulations, explained
Why your charger arrives pre-set to charge overnight, and why it waits before it starts.
Read the guide →Are heat pumps noisy? The 37 dB(A) answer, in plain terms
The 1 metre boundary rule is gone. A 37 dB(A) sound test replaced it.
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 →HIES explained: what the badge actually protects, and when
What HIES protects: deposits up to 25 percent capped at 5,000 pounds, and your workmanship guarantee.
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.