Essex
Solar panels in Chadwell St Mary, sized to your roof.
About 6,720 kWh a year from 12 panels in Chadwell St Mary, £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
Chadwell St Mary's solar year
From 37.8 kWh per kWp in December to 130.4 in July: a roof in Chadwell St Mary makes 3.4 times as much in its best month as in its darkest, and 1,057 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39.2 |
| February | 52.9 |
| March | 88.9 |
| April | 118 |
| May | 127 |
| June | 128 |
| July | 130 |
| August | 116 |
| September | 100 |
| October | 70.8 |
| November | 48.4 |
| December | 37.8 |
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 1,057, Chadwell St Mary is 14% above it.
How Chadwell St Mary compares
Small towns rarely get published solar figures, so here are the numbers for Chadwell St Mary. It is one of 46 Essex towns we track, and it ranks joint 26th of 46 for solar yield, a town of 10,885 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,057 kWh per kWp a year, 2.90 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £941 of year one benefit, £247 of it from your own generation and £694 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Chadwell St Mary'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.
Thurrock is the planning authority covering Chadwell St Mary, which the House of Commons Library classes 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.
The figures use PVGIS for the centre of Chadwell St Mary (51.48388, 0.37025), 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 Chadwell St Mary
On NESO's licence-area map, Chadwell St Mary is in East England, which UK Power Networks operates. That makes UK Power Networks the network operator for any system fitted here.
Most home systems stay within 3.68kW per phase of inverter output, which puts them on G98, a notification to UK Power Networks within 28 days of switch-on. Panel count does not decide it; the inverter and any battery do.
A bigger inverter or battery output needs a G99 application in advance. 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 Chadwell St Mary
A heat pump in Chadwell St Mary
A heat pump does most of its work from November to February. Over those four months, 12 panels in Chadwell St Mary make about 1,130 kWh, against 3,190 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more 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 Chadwell St Mary
A 12-panel roof in Chadwell St Mary 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.
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 Chadwell St Mary
Faults, servicing and ageing inverters follow the same economics in Chadwell St Mary as anywhere else, and the guides below price them plainly.
Chadwell St Mary solar questions
What does a solar panel system produce in Chadwell St Mary?
Each kWp of panels in Chadwell St Mary makes 1,057 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,720 kWh, from about 240 kWh in December up to 830 kWh in July.
What would 12 solar panels cost in Chadwell St Mary?
£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 Chadwell St Mary differs is output: about 6,720 kWh a year from that system.
Would a system in Chadwell St Mary need approval from the network operator?
Chadwell St Mary is on UK Power Networks' network (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 Chadwell St Mary?
It is exported. With typical use and no battery, about 5,786 kWh of the 6,720 kWh a 12-panel system makes in Chadwell St Mary goes to the grid, around £694 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 Chadwell St Mary in winter?
It works, but the year is lopsided. 68% of a Chadwell St Mary roof's output lands between April and September; the four months from November to February give about 1,130 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Chadwell St Mary compares with its neighbours
Same satellite dataset, same assumptions, so the differences are real geography rather than modelling noise.
| Town | kWh per kWp a year | vs Chadwell St Mary |
|---|---|---|
| Chadwell St Mary | 1,057 | this town |
| Grays | 1,055 | −2 kWh |
| Tilbury | 1,057 | level |
| Northfleet | 1,052 | −5 kWh |
| Gravesend | 1,053 | −4 kWh |
| South Ockendon | 1,050 | −7 kWh |
| Chafford Hundred, West Thurrock and Purfleet-on-Thames | 1,052 | −5 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 Chadwell St Mary: Solar panels in Chadwell St Mary from OVO Solar & Battery
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Answer a few questions about your roof and usage and see an instant solar and battery estimate. No email needed to see the result.
Further reading for Chadwell St Mary
Sourced, dated and written by us. The same ground we cover on your free call.
Do solar panels work in winter? Yes, just less than summer
Panels run on light, not sunshine. Cloud turns them down, not off. What that means for an awkward roof.
Read the guide →Which battery size band does your home fall into?
Where UK homes actually land, why oversizing costs you, and what shifts the band.
Read the guide →Home EV charger types and speeds, explained properly
Granny cable, 7kW wall unit or 22kW three phase. What each adds per hour, and which you need.
Read the guide →Are air source heat pumps any good? What owners actually report
The UK's largest survey found 80% of heat pump owners satisfied, against 70% for gas boilers.
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 →Your MCS certificate: what it shows, when it arrives, and how a Smart Export Guarantee supplier uses it
The document your export payments hang on. Who issues it, what it shows, and how to get a copy.
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.