Hertfordshire
Solar panels in Welwyn Garden City, with the numbers shown.
A 12-panel roof in Welwyn Garden City makes about 6,490 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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Welwyn Garden City's solar year
From 36.3 kWh per kWp in December to 125.2 in July: a roof in Welwyn Garden City makes 3.4 times as much in its best month as in its darkest, and 1,021 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 38.3 |
| February | 53 |
| March | 88.7 |
| April | 114 |
| May | 122 |
| June | 123 |
| July | 125 |
| August | 112 |
| September | 96.9 |
| October | 66 |
| November | 46.6 |
| December | 36.3 |
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: Welwyn Garden City makes 1,021 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Welwyn Garden City is 10% above it.
How Welwyn Garden City compares
Among the places we publish figures for, Welwyn Garden City is one of 27 Hertfordshire towns we track, and it ranks 11th of 27 for solar yield. It is a medium town in the House of Commons Library classification, with 52,709 residents, and its roofs see 2.80 peak sun hours a day across the year. That drives the standard 12 panel model to 6,494 kWh of generation, of which around 5,557 kWh is exported at 12p for £667 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 Welwyn Garden City'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.
Welwyn Hatfield is the planning authority covering Welwyn Garden City, 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.
The figures use PVGIS for the centre of Welwyn Garden City (51.80144, -0.19491), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
Who runs the grid in Welwyn Garden City
On NESO's licence-area map, Welwyn Garden City is in East England, which UK Power Networks operates. That makes UK Power Networks the network operator for any system fitted here.
Most home systems stay within 3.68kW per phase of inverter output, which puts them on G98, a notification to UK Power Networks within 28 days of switch-on. Panel count does not decide it; the inverter and any battery do.
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.
Adding a heat pump or an EV charger in Welwyn Garden City
A heat pump in Welwyn Garden City
A heat pump does most of its work from November to February. Over those four months, 12 panels in Welwyn Garden City make about 1,110 kWh, against 3,060 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more than the roof.
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 Welwyn Garden City
From April to September, 68% of a Welwyn Garden City roof's yearly output arrives, peaking at about 800 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 Welwyn Garden City
Faults, servicing and ageing inverters follow the same economics in Welwyn Garden City as anywhere else, and the guides below price them plainly.
Welwyn Garden City solar questions
What does a solar panel system produce in Welwyn Garden City?
Each kWp of panels in Welwyn Garden City makes 1,021 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,490 kWh, from about 230 kWh in December up to 800 kWh in July.
What would 12 solar panels cost in Welwyn Garden City?
£6,360 for 12 panels (6.36 kWp), the same as in every other place we cover, because solar is priced at £1,000 per kWp installed rather than by area. A battery adds its own installed price on top. Where Welwyn Garden City differs is output: about 6,490 kWh a year from that system.
Would a system in Welwyn Garden City need approval from the network operator?
Welwyn Garden City is on UK Power Networks' network (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 would export pay on a system in Welwyn Garden City?
It is exported. With typical use and no battery, about 5,557 kWh of the 6,490 kWh a 12-panel system makes in Welwyn Garden City goes to the grid, around £667 a year at 12p. A battery keeps more of it for the evening; the export rates table shows what suppliers pay.
Is solar worth it in Welwyn Garden City in winter?
It works, but the year is lopsided. 68% of a Welwyn Garden City roof's output lands between April and September; the four months from November to February give about 1,110 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Welwyn Garden City compares with its neighbours
How the towns nearest Welwyn Garden City compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Welwyn Garden City |
|---|---|---|
| Welwyn Garden City | 1,021 | this town |
| Hatfield | 1,022 | +1 kWh |
| Hertford | 1,024 | +3 kWh |
| St Albans | 1,023 | +2 kWh |
| Harpenden | 1,017 | −4 kWh |
| Ware | 1,018 | −3 kWh |
| London Colney | 1,022 | +1 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 Welwyn Garden City: Solar panels in Welwyn Garden City from OVO Solar & Battery
Also near Welwyn Garden City
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.
Reading for Welwyn Garden City homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
Why solar panels stop working, and how to work out which one it is
There is an order to this, and it starts at the inverter display rather than the roof.
Read the guide →Does a standalone battery actually pay back?
No panels means one job: buy cheap, use later. The tariff decides whether it pays.
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 →Sizing a heat pump: what a proper survey covers
Sized by calculation, not by rule of thumb. What the survey covers, and what guessing costs.
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 →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.