Pembrokeshire
Solar panels in Milford Haven, sized to your roof.
About 6,960 kWh a year from 12 panels in Milford Haven, £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
Milford Haven's solar year
Milford Haven's best month is May, at 141.3 kWh per kWp; December manages 29.8. Over the year that comes to 1,095 kWh per kWp, 10% above our Pembrokeshire county estimate.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 36 |
| February | 60 |
| March | 94.3 |
| April | 129 |
| May | 141 |
| June | 139 |
| July | 136 |
| August | 122 |
| September | 99.8 |
| October | 67.1 |
| November | 41.7 |
| December | 29.8 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 1,095 kWh per kWp in Milford Haven against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Milford Haven 18% above it.
How Milford Haven compares
Small towns rarely get published solar figures, so here are the numbers for Milford Haven. It is one of 4 Pembrokeshire towns we track, and it ranks 1st of 4 for solar yield, a town of 14,627 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,095 kWh per kWp a year, 3.00 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £970 of year one benefit, £247 of it from your own generation and £723 from export at 12p.
Every figure here assumes a clear, south-facing roof at 35 degrees. Yours will differ, which is what the free design call is for; until then, the calculator below tests panels, batteries and export rates on Milford Haven's own yield.
Pembrokeshire is the planning authority covering Milford Haven, 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.
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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 Milford Haven at 51.71308, -5.03598 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 Milford Haven
On NESO's licence-area map, Milford Haven is in South Wales, which National Grid Electricity Distribution (NGED) operates. That makes NGED the network operator for any system fitted here.
Below 3.68kW per phase of inverter and battery output, the G98 route applies: the installation is notified to NGED within 28 days of commissioning, with no prior approval.
Anything bigger is a G99 case and is applied for first. 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.
Beyond the panels: heating and car charging in Milford Haven
A heat pump in Milford Haven
A heat pump does most of its work from November to February. Over those four months, 12 panels in Milford Haven make about 1,070 kWh, against 3,420 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more than the roof.
In Wales, 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 Milford Haven
A 12-panel roof in Milford Haven makes about 900 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 Milford Haven
Faults, servicing and ageing inverters follow the same economics in Milford Haven as anywhere else, and the guides below price them plainly.
Common questions about solar in Milford Haven
What does a solar panel system produce in Milford Haven?
Each kWp of panels in Milford Haven makes 1,095 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,960 kWh, from about 190 kWh in December up to 900 kWh in May.
What would 12 solar panels cost in Milford Haven?
£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 Milford Haven differs is output: about 6,960 kWh a year from that system.
Would a system in Milford Haven need approval from the network operator?
Milford Haven is on National Grid Electricity Distribution's network (South Wales 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 Milford Haven?
It is exported. With typical use and no battery, about 6,028 kWh of the 6,960 kWh a 12-panel system makes in Milford Haven goes to the grid, around £723 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 Milford Haven in winter?
It works, but the year is lopsided. 70% of a Milford Haven roof's output lands between April and September; the four months from November to February give about 1,070 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Milford Haven compares with its neighbours
How the towns nearest Milford Haven compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Milford Haven |
|---|---|---|
| Milford Haven | 1,095 | this town |
| Pembroke Dock | 1,080 | −15 kWh |
| Pembroke | 1,086 | −9 kWh |
| Haverfordwest | 1,023 | −72 kWh |
| Carmarthen | 980 | −115 kWh |
| Llanelli | 1,064 | −31 kWh |
| Gorseinon | 1,040 | −55 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 Milford Haven: Solar panels in Milford Haven from OVO Solar & Battery
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Reading for Milford Haven homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
Why your inverter is smaller than your panel array, and why that is correct
More panel capacity than inverter capacity is a deliberate design choice.
Read the guide →Whole home backup or partial backup? The runtime arithmetic
Whole home backup sounds obvious until you do the runtime maths. Here is how to choose the right tier.
Read the guide →What an EV charger installation actually involves
Main fuse, DNO notification, load balancing and the paperwork. What really happens.
Read the guide →Are heat pumps worth it? The real 2026 numbers
Electricity costs 3.3x gas per kWh. A heat pump is about 3x as efficient. The numbers nearly cancel out.
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 →What MCS certification actually is, and why your export payments depend on it
The badge that decides whether your solar earns export payments. It cannot be added later.
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.