Norfolk
Solar panels in Diss, priced before anyone visits.
A 12-panel roof in Diss makes about 6,650 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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- Priced before anyone visits
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How much a Diss roof makes, month by month
Diss' best month is May, at 126.8 kWh per kWp; December manages 36.2. Over the year that comes to 1,045 kWh per kWp, 2% above our Norfolk county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39.5 |
| February | 54 |
| March | 89.9 |
| April | 119 |
| May | 127 |
| June | 125 |
| July | 125 |
| August | 115 |
| September | 98.1 |
| October | 68.3 |
| November | 47.7 |
| December | 36.2 |
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 1,045, Diss is 13% above it.
How Diss compares
Small towns rarely get published solar figures, so here are the numbers for Diss. It is one of 16 Norfolk towns we track, and it ranks 3rd of 16 for solar yield, a town of 9,681 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,045 kWh per kWp a year, 2.86 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £932 of year one benefit, £247 of it from your own generation and £685 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Diss' 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 Diss sits with South Norfolk, 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.
Generation is modelled from PVGIS satellite data for Diss' own coordinates (52.3762, 1.11234), 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 Diss connection
UK Power Networks owns and runs the local electricity network in Diss, as part of its 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.
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 Diss
A heat pump in Diss
In December, the darkest month here, 12 panels in Diss make about 230 kWh. That is when a heat pump runs hardest, so its running cost in Diss comes down to the tariff and the flow temperature rather 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 Diss
Summer is where a car earns its place. In May, 12 panels in Diss make about 810 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.
What the named kit costs, installed
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Diss
If a system in Diss is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Common questions about solar in Diss
How much energy would 12 solar panels make in Diss?
Diss averages 2.86 peak sun hours a day, which PVGIS turns into 1,045 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 6,650 kWh, 68% of it between April and September.
What does a typical solar system cost in Diss?
Solar is priced at £1,000 per kWp installed wherever you live, so a 12-panel, 6.36 kWp system costs £6,360 in Diss, exactly as it would anywhere else, before any battery. Location changes what the system makes, not what it costs: here that is about 6,650 kWh a year. The final figure comes from your roof on the design call.
Who is the network operator in Diss, 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 Diss?
Around £685 a year at 12p per kWh, for the roughly 5,710 kWh a 12-panel system in Diss 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 Diss in the winter months?
December is the weakest month in Diss: about 230 kWh from 12 panels, against 810 kWh in May. The panels still generate on bright winter days; they just cover a smaller share of what the house uses.
How Diss compares with its neighbours
How the towns nearest Diss compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Diss |
|---|---|---|
| Diss | 1,045 | this town |
| Attleborough | 1,036 | −9 kWh |
| Wymondham | 1,036 | −9 kWh |
| Stowmarket | 1,056 | +11 kWh |
| Thetford | 1,025 | −20 kWh |
| Hethersett | 1,034 | −11 kWh |
| Watton | 1,017 | −28 kWh |
Each row is a PVGIS v5.2 run at that town's centre with the same settings. Treat gaps of a few kWh as noise and gaps over about 30 kWh per kWp as real differences in sunshine.
Also for Diss: Solar panels in Diss 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.
Reading for Diss homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
Do you need planning permission for solar panels? Usually not
Usually not, provided the installation stays within the limits updated on 27 August 2026.
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Read the guide →Smart charge point regulations, explained
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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 →Why the best export rates always carry conditions
The top export rates are acquisition offers. Here is how to price the condition.
Read the guide →G98 or G99: which one applies, what the application involves, and how long it takes
The G98 line sits at 3.68kW per phase. Above it, your network operator has to say yes first.
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.