Durham
Solar panels in Seaham, priced before anyone visits.
A 12-panel roof in Seaham makes about 6,220 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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How much a Seaham roof makes, month by month
From 29.3 kWh per kWp in December to 126.9 in May: a roof in Seaham makes 4.3 times as much in its best month as in its darkest, and 978 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 32.8 |
| February | 50.8 |
| March | 85.4 |
| April | 113 |
| May | 127 |
| June | 117 |
| July | 121 |
| August | 109 |
| September | 91.2 |
| October | 61.3 |
| November | 41.3 |
| December | 29.3 |
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 978, Seaham is 6% above it.
How Seaham compares
Small towns rarely get published solar figures, so here are the numbers for Seaham. It is one of 35 Durham towns we track, and it ranks 3rd of 35 for solar yield, a town of 21,939 people in the House of Commons Library settlement data. PVGIS gives its roofs 978 kWh per kWp a year, 2.68 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £881 of year one benefit, £247 of it from your own generation and £634 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Seaham'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 here go through County Durham; nationally, the House of Commons Library classes Seaham as a 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.
Modelled for Seaham at 54.8363, -1.35016 on PVGIS data, with imports valued at 26.32p/kWh and solar at £1,000 per kWp installed. Sources and assumptions: help page.
Northern Powergrid and your Seaham connection
Seaham is served by Northern Powergrid: the town's centre falls inside its North East England licence area on NESO's boundary map.
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: Northern Powergrid 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: Northern Powergrid publishes a guaranteed standard of 45 working days to quote for a low voltage generation connection.
Sources: NESO DNO licence areas (3 May 2024); Northern Powergrid, generation connections page, checked 25 September 2026. G98 vs G99, explained.
Adding a heat pump or an EV charger in Seaham
A heat pump in Seaham
In December, the darkest month here, 12 panels in Seaham make about 190 kWh. That is when a heat pump runs hardest, so its running cost in Seaham comes down to the tariff and the flow temperature rather 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 Seaham
Summer is where a car earns its place. In May, 12 panels in Seaham 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 Seaham
The same sourced benchmarks apply in Seaham as everywhere we cover: honest repair pricing and what a service should include.
Common questions about solar in Seaham
How much electricity do solar panels make in Seaham?
About 6,220 kWh a year from 12 panels (6.36 kWp), on PVGIS satellite data for Seaham: 978 kWh per kWp, or 2.68 peak sun hours a day on average. May is the strongest month, at about 810 kWh.
What does a typical solar system cost in Seaham?
Solar is priced at £1,000 per kWp installed wherever you live, so a 12-panel, 6.36 kWp system costs £6,360 in Seaham, exactly as it would anywhere else, before any battery. Location changes what the system makes, not what it costs: here that is about 6,220 kWh a year. The final figure comes from your roof on the design call.
Which DNO covers Seaham, and what does it need from me?
Northern Powergrid covers Seaham. A home system of up to 3.68kW per phase is notified to Northern Powergrid within 28 days of commissioning under G98, and nothing waits on approval. Larger outputs need a G99 application before work starts. Northern Powergrid publishes a guaranteed standard of 45 working days to quote for a low voltage generation connection.
What happens to the solar I do not use in Seaham?
Around £634 a year at 12p per kWh, for the roughly 5,283 kWh a 12-panel system in Seaham exports with typical use. Rates vary by supplier and some need their own tariff; the export rates table is dated and sourced.
How much solar does Seaham get in December?
December is the low point: about 190 kWh from a 12-panel system in Seaham, on PVGIS data, rising to 810 kWh in May. From November to February the same system makes about 980 kWh in total, which is why a battery charged off-peak does more of the work in winter.
How Seaham compares with its neighbours
How the towns nearest Seaham compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Seaham |
|---|---|---|
| Seaham | 978 | this town |
| Murton | 976 | −2 kWh |
| Hetton-le-Hole | 952 | −26 kWh |
| Sunderland | 977 | −1 kWh |
| Houghton-le-Spring | 953 | −25 kWh |
| Peterlee | 975 | −3 kWh |
| Shiney Row and Penshaw | 959 | −19 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 Seaham: Solar panels in Seaham 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 Seaham homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
G98 vs G99: the 28-day form and the eight-week wait, in plain English
One number on your quote decides between a formality and an eight week wait.
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 →What it really costs to charge an EV at home versus in public
Home off-peak charging costs a fraction of the public price. The arithmetic, and the tariff it depends on.
Read the guide →Heat pump running costs versus a gas boiler, assumptions shown
Four numbers decide it: seasonal efficiency, flow temperature, tariff and heat demand.
Read the guide →EV tariffs compared: the cheapest overnight windows
Overnight rates of 6.99p to 9p against a 26.32p capped average, compared.
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.