Sussex
Solar panels in Horsham, sized to your roof.
About 6,750 kWh a year from 12 panels in Horsham, £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
Horsham's solar year
Horsham's best month is July, at 130.2 kWh per kWp; December manages 38.3. Over the year that comes to 1,061 kWh per kWp, 7% below our Sussex county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 40.5 |
| February | 55.4 |
| March | 92.4 |
| April | 120 |
| May | 126 |
| June | 129 |
| July | 130 |
| August | 115 |
| September | 99 |
| October | 68.2 |
| November | 47.8 |
| December | 38.3 |
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 1,061, Horsham is 15% above it.
How Horsham compares
Among the places we publish figures for, Horsham is one of 33 Sussex towns we track, and it ranks 30th of 33 for solar yield. It is a medium town in the House of Commons Library classification, with 51,541 residents, and its roofs see 2.91 peak sun hours a day across the year. That drives the standard 12 panel model to 6,748 kWh of generation, of which around 5,811 kWh is exported at 12p for £697 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 Horsham'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.
Planning applications in Horsham go to its own council, and the House of Commons Library classes it 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 Horsham (51.0704, -0.31792), 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 Horsham
UK Power Networks owns and runs the local electricity network in Horsham, as part of its South East England licence area.
What decides the paperwork is the inverter and battery output, not the number of panels. Up to 3.68kW per phase, a system follows G98: UK Power Networks is notified within 28 days of commissioning and nothing has to be approved first.
Anything bigger is a G99 case and is applied for 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.
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 Horsham
A heat pump in Horsham
A heat pump does most of its work from November to February. Over those four months, 12 panels in Horsham make about 1,160 kWh, against 3,180 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more than the roof.
In England, the Boiler Upgrade Scheme pays £7,500 towards an air source or ground source heat pump and £2,500 towards an air-to-air one, with £1,500 more until March 2027 for homes heated by oil or LPG with no mains gas (gov.uk, checked 28 September 2026).
Charging an EV in Horsham
A 12-panel roof in Horsham makes about 830 kWh in July. 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.
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 Horsham
Faults, servicing and ageing inverters follow the same economics in Horsham as anywhere else, and the guides below price them plainly.
Horsham solar questions
What does a solar panel system produce in Horsham?
Each kWp of panels in Horsham makes 1,061 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,750 kWh, from about 240 kWh in December up to 830 kWh in July.
What would 12 solar panels cost in Horsham?
£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 Horsham differs is output: about 6,750 kWh a year from that system.
Would a system in Horsham need approval from the network operator?
Horsham is on UK Power Networks' network (South 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 Horsham?
It is exported. With typical use and no battery, about 5,811 kWh of the 6,750 kWh a 12-panel system makes in Horsham goes to the grid, around £697 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 Horsham in winter?
It works, but the year is lopsided. 68% of a Horsham roof's output lands between April and September; the four months from November to February give about 1,160 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Horsham compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Horsham.
| Town | kWh per kWp a year | vs Horsham |
|---|---|---|
| Horsham | 1,061 | this town |
| Southwater | 1,088 | +27 kWh |
| Crawley | 1,035 | −26 kWh |
| Billingshurst | 1,079 | +18 kWh |
| Cranleigh | 1,050 | −11 kWh |
| Horley | 1,032 | −29 kWh |
| Haywards Heath | 1,088 | +27 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 Horsham: Solar panels in Horsham from OVO Solar & Battery
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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.
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Read the guide →Three phase and EV charging: what actually changes
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Read the guide →Are heat pumps noisy? The 37 dB(A) answer, in plain terms
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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 →How to check an MCS certificate is genuine, before the deposit leaves your account
A logo proves nothing. Certification is business specific, technology specific and checkable.
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.