Lancashire
Solar panels in St Helens, designed on a free call.
Twelve panels (6.36 kWp) here make about 5,970 kWh a year for £6,360 installed, designed around your roof on a free 30-minute video call.
Get my free quote
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.
or call 07782 219224
- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
How much a St Helens roof makes, month by month
PVGIS puts St Helens at 939 kWh per kWp a year, 8% above our Lancashire county estimate. 69% of it arrives between April and September, peaking in May.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 30.3 |
| February | 50.3 |
| March | 83.6 |
| April | 109 |
| May | 122 |
| June | 115 |
| July | 116 |
| August | 103 |
| September | 85.7 |
| October | 57.2 |
| November | 38.8 |
| December | 28.2 |
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 Helens makes 939 kWh per kWp a year, and the mean of our 85 county PVGIS estimates (our GB average) is 925, so St Helens is 2% above it.
How St Helens compares
St Helens is one of 109 Lancashire towns we track, and it ranks 28th of 109 for solar yield. The House of Commons Library settlement data classes it as a large town of 111,050 people. At 939 kWh per kWp a year, a typical 12 panel system here pays for itself in around 7.5 years on the 12p scenario: £851 of year one benefit against £6,360 installed, £247 of that benefit from cutting 26.32p imports with your own generation.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on St Helens' 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.
Any planning application in St Helens sits with St. Helens, and its official House of Commons Library settlement class is large 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 St Helens (53.44689, -2.73455), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
The network operator for St Helens
The distribution network operator (DNO) for St Helens is SP Energy Networks, which runs the North Wales, Merseyside and Cheshire licence area.
G98 is the simple route. If the inverter, plus any battery, stays at or under 3.68kW per phase, SP Energy Networks only has to be told within 28 days after the system is commissioned.
Above that, G99 means applying before the work is booked. 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 SP Energy 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.
Heat pumps and EV charging in St Helens
A heat pump in St Helens
In December, the darkest month here, 12 panels in St Helens make about 180 kWh. That is when a heat pump runs hardest, so its running cost in St Helens 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 St Helens
St Helens' May output, about 780 kWh from 12 panels, is several times the 70 kWh or so a typical home uses in daylight that month on our calculator's settings. Daytime charging turns that surplus into miles.
Renters and flat owners with private off-street parking can get 75% off a chargepoint and its installation, up to £500 per socket, until 31 March 2027 (gov.uk, checked 28 September 2026). The calculator above adds 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 St Helens
If a system in St Helens is underperforming, start with the guides below: repair benchmarks, service scope, and the inverter question.
Solar in St Helens: your questions answered
How much energy would 12 solar panels make in St Helens?
St Helens averages 2.57 peak sun hours a day, which PVGIS turns into 939 kWh per kWp a year. On a 12-panel, 6.36 kWp roof that is about 5,970 kWh, 69% of it between April and September.
Is solar more expensive in St Helens?
Prices on this site are the same everywhere: £1,000 per kWp installed, which puts a 12-panel system at £6,360 in St Helens, and a Duracell Dura16 installed with solar at £4,450 on top. The local part is generation, about 5,970 kWh a year here, which is what drives payback.
Who is the network operator in St Helens, and do I need a G99 application?
The operator is SP Energy 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 SP Energy Networks as it does every network operator. Your design call checks which route yours needs.
What could I earn from exporting in St Helens?
On the 12p export scenario, a 12-panel system in St Helens sends about 5,035 kWh a year to the grid, worth around £604. The export rates table compares what each supplier pays.
How does solar perform in St Helens in the winter months?
December is the weakest month in St Helens: about 180 kWh from 12 panels, against 780 kWh in May. The panels still generate on bright winter days; they just cover a smaller share of what the house uses.
How St Helens 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 St Helens |
|---|---|---|
| St Helens | 939 | this town |
| Prescot | 944 | +5 kWh |
| Haydock | 933 | −6 kWh |
| Newton-le-Willows | 929 | −10 kWh |
| Ashton-in-Makerfield | 930 | −9 kWh |
| Huyton with Roby | 951 | +12 kWh |
| Widnes | 938 | −1 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 Helens: Solar panels in St Helens 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.
Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
How to clean solar panels, and whether you need to at all
Cleaning is oversold and pigeon mesh is undersold. The numbers behind both.
Read the guide →Inside a home battery: capacity, power and losses
Usable capacity, kW output, round trip losses and chemistry, in plain terms.
Read the guide →The main home EV chargers, compared on what actually differs
Eight popular UK home chargers on cable, connectivity, warranty and tariff integration.
Read the guide →Which homes suit a heat pump, and which need work first
The trial data says no property type is unsuitable. Design quality decides the outcome.
Read the guide →What the Smart Export Guarantee actually is
The scheme obliges suppliers to pay above zero, and leaves the rate to them.
Read the guide →NAPIT, NICEIC and competent person schemes: who tells building control about your solar
Solar work is notifiable. A competent person scheme means your installation team notifies, not you.
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.