Hertfordshire
Solar panels in Hatfield, designed on a free call.
A 12-panel roof in Hatfield makes about 6,500 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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Sunlight in Hatfield, in numbers
Hatfield's best month is July, at 125.4 kWh per kWp; December manages 35.7. Over the year that comes to 1,022 kWh per kWp, level with our Hertfordshire county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 38.7 |
| February | 52.9 |
| March | 88.6 |
| April | 114 |
| May | 122 |
| June | 123 |
| July | 125 |
| August | 112 |
| September | 97.1 |
| October | 66.1 |
| November | 46.8 |
| December | 35.7 |
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: Hatfield makes 1,022 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Hatfield is 10% above it.
How Hatfield compares
Among the places we publish figures for, Hatfield is one of 27 Hertfordshire towns we track, and it ranks joint 9th of 27 for solar yield. It is a medium town in the House of Commons Library classification, with 43,211 residents, and its roofs see 2.80 peak sun hours a day across the year. That drives the standard 12 panel model to 6,500 kWh of generation, of which around 5,563 kWh is exported at 12p for £668 a year, with £247 saved on electricity you would otherwise buy at 26.32p.
Every figure here assumes a clear, south-facing roof at 35 degrees. Yours will differ, which is what the free design call is for; until then, the calculator below tests panels, batteries and export rates on Hatfield's own yield.
Planning applications here go through Welwyn Hatfield; nationally, the House of Commons Library classes Hatfield 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.
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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.
Generation is modelled from PVGIS satellite data for Hatfield's own coordinates (51.76209, -0.23287), 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.
UK Power Networks and your Hatfield connection
The distribution network operator (DNO) for Hatfield is UK Power Networks, which runs the 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.
Above that, G99 means applying before the work is booked. 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.
Beyond the panels: heating and car charging in Hatfield
A heat pump in Hatfield
Heating demand peaks when solar is weakest. In Hatfield, a 12-panel system makes about 230 kWh in December and 250 kWh in January, a fraction of its 800 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 Hatfield
Hatfield's July output, about 800 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).
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 Hatfield
If a system in Hatfield is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Solar in Hatfield: your questions answered
How much energy would 12 solar panels make in Hatfield?
Hatfield averages 2.80 peak sun hours a day, which PVGIS turns into 1,022 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 6,500 kWh, 68% of it between April and September.
Is solar more expensive in Hatfield?
Prices on this site are the same everywhere: £1,000 per kWp installed, which puts a 12-panel system at £6,360 in Hatfield, and a Duracell Dura16 installed with solar at £4,450 on top. The local part is generation, about 6,500 kWh a year here, which is what drives payback.
Who is the network operator in Hatfield, 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 could I earn from exporting in Hatfield?
On the 12p export scenario, a 12-panel system in Hatfield sends about 5,563 kWh a year to the grid, worth around £668. The export rates table compares what each supplier pays.
How does solar perform in Hatfield in the winter months?
December is the weakest month in Hatfield: about 230 kWh from 12 panels, against 800 kWh in July. The panels still generate on bright winter days; they just cover a smaller share of what the house uses.
How Hatfield compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Hatfield.
| Town | kWh per kWp a year | vs Hatfield |
|---|---|---|
| Hatfield | 1,022 | this town |
| Welwyn Garden City | 1,021 | −1 kWh |
| St Albans | 1,023 | +1 kWh |
| London Colney | 1,022 | level |
| Potters Bar | 1,026 | +4 kWh |
| Harpenden | 1,017 | −5 kWh |
| Radlett | 1,018 | −4 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 Hatfield: Solar panels in Hatfield from OVO Solar & Battery
See a number before you speak to anyone
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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.
How long do solar panels last? 25 to 30 years, in practice
The panels outlast the inverter by a wide margin. Plan for that, not for cleaning.
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 →Three phase and EV charging: what actually changes
Three phase buys 22kW charging. Most cars cannot use it, and load balancing usually solves the real problem.
Read the guide →What are the disadvantages of a heat pump? Six honest ones
Six real disadvantages, worth planning around rather than a reason to rule one out.
Read the guide →Choosing a tariff when you have solar, a battery and an EV
Solar, battery and EV want different tariffs. How to work out which one to protect.
Read the guide →MCS, HIES, RECC, NAPIT, TrustMark and Flexi-Orb: which badge does what
Six logos, six different jobs. What each scheme covers, and which are actually required.
Read the guide →Get my free quote
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