Cornwall
Solar panels in Penzance, with the numbers shown.
A 12-panel roof in Penzance makes about 6,990 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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Penzance's solar year
From 33.4 kWh per kWp in December to 135.5 in May: a roof in Penzance makes 4.1 times as much in its best month as in its darkest, and 1,099 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39.3 |
| February | 58.8 |
| March | 92.7 |
| April | 127 |
| May | 136 |
| June | 135 |
| July | 134 |
| August | 124 |
| September | 104 |
| October | 70.4 |
| November | 44.2 |
| December | 33.4 |
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: Penzance makes 1,099 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so Penzance is 19% above it.
How Penzance compares
Small towns rarely get published solar figures, so here are the numbers for Penzance. It is one of 14 Cornwall towns we track, and it ranks 3rd of 14 for solar yield, a town of 14,887 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,099 kWh per kWp a year, 3.01 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £973 of year one benefit, £247 of it from your own generation and £726 from export at 12p.
These are starting numbers, not a quote. The calculator below opens on Penzance'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.
Cornwall is the planning authority covering Penzance, 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 Penzance at 50.12078, -5.54471 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 Penzance
On NESO's licence-area map, Penzance is in South West England, which National Grid Electricity Distribution (NGED) operates. That makes NGED 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 NGED 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. 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.
Adding a heat pump or an EV charger in Penzance
A heat pump in Penzance
A heat pump does most of its work from November to February. Over those four months, 12 panels in Penzance make about 1,120 kWh, against 3,370 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 Penzance
From April to September, 69% of a Penzance roof's yearly output arrives, peaking at about 860 kWh in May on 12 panels. A car parked at home in daylight can soak up what the house, at around 70 kWh of daytime use that month, cannot.
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 Penzance
Faults, servicing and ageing inverters follow the same economics in Penzance as anywhere else, and the guides below price them plainly.
Penzance solar questions
What does a solar panel system produce in Penzance?
Each kWp of panels in Penzance makes 1,099 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,990 kWh, from about 210 kWh in December up to 860 kWh in May.
How much are solar panels in Penzance?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Penzance before a battery. What Penzance changes is the return, about 6,990 kWh a year from that system, and your design call prices your actual roof.
Would a system in Penzance need approval from the network operator?
Penzance 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 can I earn from exporting solar in Penzance?
With typical use and no battery, a 12-panel system in Penzance exports about 6,053 kWh a year. At 12p per kWh that is roughly £726; a supplier paying more, or a battery that keeps more for the evening, changes the figure. See the export rates table.
Is solar worth it in Penzance in winter?
It works, but the year is lopsided. 69% of a Penzance roof's output lands between April and September; the four months from November to February give about 1,120 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Penzance 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 Penzance |
|---|---|---|
| Penzance | 1,099 | this town |
| Hayle | 1,102 | +3 kWh |
| Helston | 1,110 | +11 kWh |
| Camborne | 1,026 | −73 kWh |
| Redruth | 1,038 | −61 kWh |
| Penryn | 1,062 | −37 kWh |
| Falmouth | 1,056 | −43 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 Penzance: Solar panels in Penzance from OVO Solar & Battery
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Further reading for Penzance
Sourced, dated and written by us. The same ground we cover on your free call.
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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.