Hertfordshire
Solar panels in Hemel Hempstead, priced before anyone visits.
About 6,460 kWh a year from 12 panels in Hemel Hempstead, £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
How much a Hemel Hempstead roof makes, month by month
From 36.1 kWh per kWp in December to 124.8 in July: a roof in Hemel Hempstead makes 3.5 times as much in its best month as in its darkest, and 1,016 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 38.8 |
| February | 53.4 |
| March | 88.8 |
| April | 114 |
| May | 121 |
| June | 122 |
| July | 125 |
| August | 111 |
| September | 95.9 |
| October | 65.9 |
| November | 45.3 |
| 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.
Our GB average is 925 kWh per kWp a year, the mean of the 85 county PVGIS estimates we publish; at 1,016, Hemel Hempstead is 10% above it.
How Hemel Hempstead compares
Hemel Hempstead is one of 27 Hertfordshire towns we track, and it ranks joint 18th of 27 for solar yield. The House of Commons Library settlement data classes it as a large town of 100,893 people. At 1,016 kWh per kWp a year, a typical 12 panel system here pays for itself in around 7.0 years on the 12p scenario: £910 of year one benefit against £6,360 installed, £247 of that benefit from cutting 26.32p imports with your own generation.
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 Hemel Hempstead's own yield.
Any planning application in Hemel Hempstead sits with Dacorum, and its official House of Commons Library settlement class is large 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 Hemel Hempstead's own coordinates (51.75311, -0.46294), 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.
The network operator for Hemel Hempstead
The distribution network operator (DNO) for Hemel Hempstead 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.
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.
Beyond the panels: heating and car charging in Hemel Hempstead
A heat pump in Hemel Hempstead
Heating demand peaks when solar is weakest. In Hemel Hempstead, 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.
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 Hemel Hempstead
Summer is where a car earns its place. In July, 12 panels in Hemel Hempstead make about 790 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.
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.
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 Hemel Hempstead
If a system in Hemel Hempstead is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Solar in Hemel Hempstead: your questions answered
How much energy would 12 solar panels make in Hemel Hempstead?
Hemel Hempstead averages 2.78 peak sun hours a day, which PVGIS turns into 1,016 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 6,460 kWh, 68% of it between April and September.
What does a typical solar system cost in Hemel Hempstead?
Solar is priced at £1,000 per kWp installed wherever you live, so a 12-panel, 6.36 kWp system costs £6,360 in Hemel Hempstead, exactly as it would anywhere else, before any battery. Location changes what the system makes, not what it costs: here that is about 6,460 kWh a year. The final figure comes from your roof on the design call.
Who is the network operator in Hemel Hempstead, 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 Hemel Hempstead?
Around £663 a year at 12p per kWh, for the roughly 5,525 kWh a 12-panel system in Hemel Hempstead 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 Hemel Hempstead in the winter months?
December is the weakest month in Hemel Hempstead: about 230 kWh from 12 panels, against 790 kWh in July. The panels still generate on bright winter days; they just cover a smaller share of what the house uses.
How Hemel Hempstead compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Hemel Hempstead.
| Town | kWh per kWp a year | vs Hemel Hempstead |
|---|---|---|
| Hemel Hempstead | 1,016 | this town |
| Abbots Langley and Kings Langley | 1,016 | level |
| Berkhamsted | 1,007 | −9 kWh |
| St Albans | 1,023 | +7 kWh |
| Harpenden | 1,017 | +1 kWh |
| Watford | 1,013 | −3 kWh |
| Chesham | 1,009 | −7 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 Hemel Hempstead: Solar panels in Hemel Hempstead from OVO Solar & Battery
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.
Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
How long does a solar inverter last, and when does replacing it make sense?
The one component you should expect to replace, and the decision tree when it goes.
Read the guide →Adding a battery to solar panels you already own
Retrofitting a battery to working solar is straightforward. The paperwork is where people trip up.
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 →How an air source heat pump actually works
It moves heat rather than making it. The cycle, the efficiency numbers and the trade-offs.
Read the guide →Will energy prices keep rising, and by how much
The January forecasts jumped fast. What is confirmed, what is guessed, and whether solar is a real hedge.
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.