Suffolk
Solar panels in Stowmarket, priced before anyone visits.
About 6,720 kWh a year from 12 panels in Stowmarket, £6,360 installed, with your system designed 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
Sunlight in Stowmarket, in numbers
PVGIS puts Stowmarket at 1,056 kWh per kWp a year, level with our Suffolk county estimate. 68% of it arrives between April and September, peaking in June.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39.8 |
| February | 55.1 |
| March | 89.9 |
| April | 120 |
| May | 126 |
| June | 126 |
| July | 126 |
| August | 116 |
| September | 99.9 |
| October | 69.8 |
| November | 49.3 |
| December | 37.1 |
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 1,056, Stowmarket is 14% above it.
How Stowmarket compares
Small towns rarely get published solar figures, so here are the numbers for Stowmarket. It is one of 16 Suffolk towns we track, and it ranks 10th of 16 for solar yield, a town of 21,595 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,056 kWh per kWp a year, 2.89 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £941 of year one benefit, £247 of it from your own generation and £694 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Stowmarket'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.
Any planning application in Stowmarket sits with Mid Suffolk, and its official House of Commons Library settlement class is 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.
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.
Modelled for Stowmarket at 52.18617, 0.99688 on PVGIS data, with imports valued at 26.32p/kWh and solar at £1,000 per kWp installed. Sources and assumptions: help page.
The network operator for Stowmarket
On NESO's licence-area map, Stowmarket is in East England, which UK Power Networks operates. That makes UK Power Networks 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 UK Power Networks within 28 days of commissioning, with no prior approval.
Larger systems go through G99 instead, applied for before installation. On timing: 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 Stowmarket
A heat pump in Stowmarket
Heating demand peaks when solar is weakest. In Stowmarket, a 12-panel system makes about 240 kWh in December and 250 kWh in January, a fraction of its 800 kWh in June, which is why a heat pump here is costed on its tariff first.
Grant support in England comes from the Boiler Upgrade Scheme: £7,500 for an air source or ground source heat pump, £2,500 for air-to-air, and an extra £1,500 until March 2027 where the home is heated by oil or LPG off the gas grid (gov.uk, checked 28 September 2026).
Charging an EV in Stowmarket
Summer is where a car earns its place. In June, 12 panels in Stowmarket make about 800 kWh, against roughly 70 kWh a typical home uses in daylight that month on our calculator's typical-use settings, so there is surplus a smart charger can put into the car instead of exporting it.
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 Stowmarket
If a system in Stowmarket is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Stowmarket solar questions
How much energy would 12 solar panels make in Stowmarket?
Stowmarket averages 2.89 peak sun hours a day, which PVGIS turns into 1,056 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 6,720 kWh, 68% of it between April and September.
What does a typical solar system cost in Stowmarket?
Solar is priced at £1,000 per kWp installed wherever you live, so a 12-panel, 6.36 kWp system costs £6,360 in Stowmarket, exactly as it would anywhere else, before any battery. Location changes what the system makes, not what it costs: here that is about 6,720 kWh a year. The final figure comes from your roof on the design call.
Who is the network operator in Stowmarket, and do I need a G99 application?
The operator is UK Power Networks. Most home systems use the G98 route, a notification within 28 days of switch-on for up to 3.68kW per phase, so nothing waits on the network. Above that, G99 applies and has to be granted 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. Your design call checks which route yours needs.
What happens to the solar I do not use in Stowmarket?
Around £694 a year at 12p per kWh, for the roughly 5,779 kWh a 12-panel system in Stowmarket exports with typical use. Rates vary by supplier and some need their own tariff; the export rates table is dated and sourced.
How does solar perform in Stowmarket in the winter months?
December is the weakest month in Stowmarket: about 240 kWh from 12 panels, against 800 kWh in June. The panels still generate on bright winter days; they just cover a smaller share of what the house uses.
How Stowmarket 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 Stowmarket |
|---|---|---|
| Stowmarket | 1,056 | this town |
| Hadleigh | 1,072 | +16 kWh |
| Ipswich | 1,079 | +23 kWh |
| Bury St Edmunds | 1,042 | −14 kWh |
| Kesgrave | 1,090 | +34 kWh |
| Diss | 1,045 | −11 kWh |
| Woodbridge | 1,095 | +39 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 Stowmarket: Solar panels in Stowmarket from OVO Solar & Battery
Also near Stowmarket
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.
Further reading for Stowmarket
Sourced, dated and written by us. The same ground we cover on your free call.
DNO application timescales, network by network: from a G98 notification to a G99 approval
Fit and notify within 28 days, or wait ten working days to 45 for a yes. System size decides which.
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 →Charging an EV from your own solar
Every surplus kWh is 3.6 to 5 miles. Whether that beats a 7p overnight rate is arithmetic.
Read the guide →Heat pump running costs versus a gas boiler, assumptions shown
Four numbers decide it: seasonal efficiency, flow temperature, tariff and heat demand.
Read the guide →EV tariffs compared: the cheapest overnight windows
Overnight rates of 6.99p to 9p against a 26.32p capped average, compared.
Read the guide →What MCS certification actually is, and why your export payments depend on it
The badge that decides whether your solar earns export payments. It cannot be added later.
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.