Cornwall
Solar panels in St Austell, sized to your roof.
A 12-panel roof in St Austell makes about 6,680 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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St Austell's solar year
From 34.6 kWh per kWp in December to 128.9 in May: a roof in St Austell makes 3.7 times as much in its best month as in its darkest, and 1,051 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 38.6 |
| February | 56.3 |
| March | 90.6 |
| April | 121 |
| May | 129 |
| June | 129 |
| July | 127 |
| August | 116 |
| September | 98.9 |
| October | 66.9 |
| November | 44.4 |
| December | 34.6 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
Against Great Britain as a whole: St Austell makes 1,051 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so St Austell is 14% above it.
How St Austell compares
Small towns rarely get published solar figures, so here are the numbers for St Austell. It is one of 14 Cornwall towns we track, and it ranks 9th of 14 for solar yield, a town of 24,539 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,051 kWh per kWp a year, 2.88 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £937 of year one benefit, £247 of it from your own generation and £690 from export at 12p.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on St Austell's own yield, and prices a 12 panel system at £6,360 installed before any battery. Your free design call reworks every number for your actual roof, its shading and your usage.
Cornwall is the planning authority covering St Austell, 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.
Modelled for St Austell at 50.34182, -4.77946 on PVGIS data, with imports valued at 26.32p/kWh and solar at £1,000 per kWp installed. Sources and assumptions: help page.
Who runs the grid in St Austell
National Grid Electricity Distribution (NGED) owns and runs the local electricity network in St Austell, as part of its South West England licence area.
For a typical home the paperwork is light: a system of up to 3.68kW per phase goes through G98, which means NGED is notified within 28 days of switch-on rather than asked beforehand.
A bigger inverter or battery output needs a G99 application in advance. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late.
Sources: NESO DNO licence areas (3 May 2024); NGED, guaranteed standards of performance table, checked 25 September 2026. G98 vs G99, explained.
Heat pumps and EV charging in St Austell
A heat pump in St Austell
A heat pump does most of its work from November to February. Over those four months, 12 panels in St Austell make about 1,110 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.
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 St Austell
A 12-panel roof in St Austell makes about 820 kWh in May. 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.
Installed prices, the same in every town
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in St Austell
Faults, servicing and ageing inverters follow the same economics in St Austell as anywhere else, and the guides below price them plainly.
St Austell solar questions
What does a solar panel system produce in St Austell?
Each kWp of panels in St Austell makes 1,051 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,680 kWh, from about 220 kWh in December up to 820 kWh in May.
What would 12 solar panels cost in St Austell?
£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 St Austell differs is output: about 6,680 kWh a year from that system.
Would a system in St Austell need approval from the network operator?
St Austell is on National Grid Electricity Distribution's network (South West England licence area). Systems up to 3.68kW per phase of inverter output follow G98: NGED is notified within 28 days of commissioning, with no approval needed first. Anything larger needs a G99 application before installation. NGED's guaranteed standards give 45 working days for a low voltage generation quotation, with £80 paid for each working day late. Our G98 vs G99 guide explains both routes.
How much would export pay on a system in St Austell?
It is exported. With typical use and no battery, about 5,748 kWh of the 6,680 kWh a 12-panel system makes in St Austell goes to the grid, around £690 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 St Austell in winter?
It works, but the year is lopsided. 68% of a St Austell roof's output lands between April and September; the four months from November to February give about 1,110 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How St Austell compares with its neighbours
How the towns nearest St Austell compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs St Austell |
|---|---|---|
| St Austell | 1,051 | this town |
| Bodmin | 1,039 | −12 kWh |
| Truro | 1,052 | +1 kWh |
| Newquay | 1,054 | +3 kWh |
| Liskeard | 1,042 | −9 kWh |
| Falmouth | 1,056 | +5 kWh |
| Penryn | 1,062 | +11 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 St Austell: Solar panels in St Austell 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.
Reading for St Austell homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
How many solar panels do I need? The honest way to count
One panel is 2.26 square metres. The rest is measuring your roof honestly.
Read the guide →Does a standalone battery actually pay back?
No panels means one job: buy cheap, use later. The tariff decides whether it pays.
Read the guide →How time of use charging windows actually work
How a cheap overnight window is metered and billed, and what a battery does inside it.
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 →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 →MCS, HIES, RECC, NAPIT, TrustMark and Flexi-Orb: which badge does what
Six logos, six different jobs. What each scheme covers, and which are actually required.
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.