Solar explained to clever people by people who are not trying to be clever
Home Regions
Insights
Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in SA41 (Pembrokeshire)

See if solar pays off for you in Pembrokeshire — price, savings and payback in under a minute (official UK data).

Solar Calculator

Change the settings below to see how costs and savings work for your situation.

System Size

Roof Direction

Battery Storage

Export Value

Your Numbers

Break-even
13.0 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£939
What you save every year
Profit Over 25 Years
£11,267
After paying itself off, you're this much ahead

Ready to Get Started?

Get your free quote from Blue Ape Renewables. They'll connect you with MCS-certified installers in your area and handle all the paperwork.

Get Solar Quote →
4.8★ Trustpilot • Octopus Energy trusted partner • MCS certified • No obligation
How we calculate this

Solar generation: Based on typical south-facing roof at 35° angle. We account for weather, dirt, and system losses (14%).

How much you'll use directly:

  • Without battery: You'll use about 40% of what you generate. The rest gets sold back to the grid.
  • With 5 kWh battery: You'll use about 70% (battery stores extra for evening use).
  • With 10 kWh battery: You'll use about 75% (more storage means less exported).
  • Panel-only payback: Bigger systems don’t shorten payback—cost and savings rise together per kW.
  • Battery & payback: Batteries raise self-use and cut bills, but added hardware cost often lengthens break-even at typical UK rates.
  • When a battery can still make sense:
    • Evening-heavy usage patterns
    • Time-of-use tariffs / cheap night rates
    • Low export rate vs. high unit rate
    • Heat pump or EV charging synergy
    • Optional backup/resilience (system-dependent)
    • Lower evening-hour CO₂ vs. grid

Costs: Battery prices are typically £700 per kWh. Export tariffs vary by supplier (usually 5–15p per kWh).

Grid connection: Systems up to about 3.7 kW typically need just a notification (G98). Larger systems may need permission (G99).

These are typical values based on average usage patterns. Your actual results will vary based on your roof, shading, and how you use electricity.

Your area in context

In South Wales, the current unit rate is 26.83p/kWh with a 51.69p/day standing charge. Your postcode’s south-facing sunshine yield is 935 kWh/kW — 33 below the regional median (968).

Read the full story

A typical roof here lands around 6.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 935 kWh per year on a south-facing roof. We value self-used electricity at 26.8p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.8p/kWh
Standing charge
51.7p/day
Sunshine yield (south)
935 kWh/kW
Export price (baseline)
10p/kWh

Browse the scenarios below. Each battery size has its own expand — open the one that matches your plan (or just explore). For each system size (2–8 kW) we show annual output, how much you use directly, what gets exported, annual benefit, upfront cost, break-even, and a 20-year net. Negative numbers are possible — that’s the honest trade-off when adding more battery than your usage profile justifies.

No battery 5 kW example → Annual benefit: £782, Upfront: £10,173, Break-even: 13.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1871 kWh 748 kWh 1122 kWh £201 £112 £313 £4,069 13.0 yrs £2,191
3 kW 2806 kWh 1122 kWh 1684 kWh £301 £168 £469 £6,104 13.0 yrs £3,286
4 kW 3741 kWh 1496 kWh 2245 kWh £402 £224 £626 £8,138 13.0 yrs £4,381
5 kW 4676 kWh 1871 kWh 2806 kWh £502 £281 £782 £10,173 13.0 yrs £5,477
6 kW 5612 kWh 2245 kWh 3367 kWh £602 £337 £939 £12,207 13.0 yrs £6,572
7 kW 6547 kWh 2619 kWh 3928 kWh £703 £393 £1,095 £14,242 13.0 yrs £7,667
8 kW 7482 kWh 2993 kWh 4489 kWh £803 £449 £1,252 £16,276 13.0 yrs £8,763

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £940, Upfront: £12,273, Break-even: 13.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1871 kWh 1122 kWh 748 kWh £301 £75 £376 £6,169 16.4 yrs £1,350
3 kW 2806 kWh 1684 kWh 1122 kWh £452 £112 £564 £8,204 14.5 yrs £3,075
4 kW 3741 kWh 2245 kWh 1496 kWh £602 £150 £752 £10,238 13.6 yrs £4,800
5 kW 4676 kWh 2806 kWh 1871 kWh £753 £187 £940 £12,273 13.1 yrs £6,525
6 kW 5612 kWh 3367 kWh 2245 kWh £903 £224 £1,128 £14,307 12.7 yrs £8,250
7 kW 6547 kWh 3928 kWh 2619 kWh £1,054 £262 £1,316 £16,342 12.4 yrs £9,975
8 kW 7482 kWh 4489 kWh 2993 kWh £1,205 £299 £1,504 £18,376 12.2 yrs £11,700

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £1,019, Upfront: £13,673, Break-even: 13.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1871 kWh 1309 kWh 561 kWh £351 £56 £407 £7,569 18.6 yrs £580
3 kW 2806 kWh 1964 kWh 842 kWh £527 £84 £611 £9,604 15.7 yrs £2,619
4 kW 3741 kWh 2619 kWh 1122 kWh £703 £112 £815 £11,638 14.3 yrs £4,659
5 kW 4676 kWh 3274 kWh 1403 kWh £878 £140 £1,019 £13,673 13.4 yrs £6,699
6 kW 5612 kWh 3928 kWh 1684 kWh £1,054 £168 £1,222 £15,707 12.9 yrs £8,739
7 kW 6547 kWh 4583 kWh 1964 kWh £1,230 £196 £1,426 £17,742 12.4 yrs £10,779
8 kW 7482 kWh 5238 kWh 2245 kWh £1,405 £224 £1,630 £19,776 12.1 yrs £12,818

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,042, Upfront: £15,423, Break-even: 14.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1871 kWh 1366 kWh 505 kWh £366 £51 £417 £9,319 22.4 yrs £-982
3 kW 2806 kWh 2048 kWh 758 kWh £550 £76 £625 £11,354 18.2 yrs £1,153
4 kW 3741 kWh 2731 kWh 1010 kWh £733 £101 £834 £13,388 16.1 yrs £3,287
5 kW 4676 kWh 3414 kWh 1263 kWh £916 £126 £1,042 £15,423 14.8 yrs £5,421
6 kW 5612 kWh 4097 kWh 1515 kWh £1,099 £152 £1,251 £17,457 14.0 yrs £7,555
7 kW 6547 kWh 4779 kWh 1768 kWh £1,282 £177 £1,459 £19,492 13.4 yrs £9,690
8 kW 7482 kWh 5462 kWh 2020 kWh £1,465 £202 £1,668 £21,526 12.9 yrs £11,824

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,058, Upfront: £17,173, Break-even: 16.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1871 kWh 1403 kWh 468 kWh £376 £47 £423 £11,069 26.2 yrs £-2,606
3 kW 2806 kWh 2104 kWh 701 kWh £565 £70 £635 £13,104 20.6 yrs £-408
4 kW 3741 kWh 2806 kWh 935 kWh £753 £94 £846 £15,138 17.9 yrs £1,789
5 kW 4676 kWh 3507 kWh 1169 kWh £941 £117 £1,058 £17,173 16.2 yrs £3,986
6 kW 5612 kWh 4209 kWh 1403 kWh £1,129 £140 £1,270 £19,207 15.1 yrs £6,183
7 kW 6547 kWh 4910 kWh 1637 kWh £1,317 £164 £1,481 £21,242 14.3 yrs £8,380
8 kW 7482 kWh 5612 kWh 1871 kWh £1,506 £187 £1,693 £23,276 13.8 yrs £10,578

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,074, Upfront: £19,623, Break-even: 18.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1871 kWh 1440 kWh 430 kWh £386 £43 £429 £13,519 31.5 yrs £-4,930
3 kW 2806 kWh 2161 kWh 645 kWh £580 £65 £644 £15,554 24.1 yrs £-2,669
4 kW 3741 kWh 2881 kWh 860 kWh £773 £86 £859 £17,588 20.5 yrs £-409
5 kW 4676 kWh 3601 kWh 1076 kWh £966 £108 £1,074 £19,623 18.3 yrs £1,851
6 kW 5612 kWh 4321 kWh 1291 kWh £1,159 £129 £1,288 £21,657 16.8 yrs £4,111
7 kW 6547 kWh 5041 kWh 1506 kWh £1,353 £151 £1,503 £23,692 15.8 yrs £6,371
8 kW 7482 kWh 5761 kWh 1721 kWh £1,546 £172 £1,718 £25,726 15.0 yrs £8,631

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

Figures are illustrative and use the same method as the calculator above. For exact results, adjust your roof direction, tariff, and usage in the calculator.

Insights for SA41

Figures below are tailored to SA41 — click through for full league tables.

Big-Roof Britain Rank #136 of 2182
6.4 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #1622 of 2997
11.3 years (UK avg 11.3 years)
~£1,081 /yr • £12,207 upfront
Standing-Charge Drag Rank #882 of 2997
17.5% (UK avg 21.7%) drag on savings
£189 fixed • ~£1,081 /yr value

Your Area at a Glance

Your Electricity Rate
26.83p/kWh
Daily Fixed Charge
51.69p/day
Local Sunshine
935kWh/kW
A 1 kW system generates ~935 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
6.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 73% • Flats: 6% • Bungalows: 21% Based on 605 properties

Coverage

Pembrokeshire (97%)|Ceredigion (3%)

Areas Covered

Cilgerran and Eglwyswrw, Crymych and Mynachlog-ddu, St Dogmaels, Teifi, Boncath and Clydau

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q4 2025

Installation costs: MCS certified installer data, March 2025

Property data: EPC open data (Open Government Licence), aggregated

All estimates are typical values. Actual results vary based on your specific situation, roof characteristics, and usage patterns.

Compare nearby areas

Nearby in South Wales

SA36 (Pembrokeshire)
≈7.3 km away
Local sunshine: ~935 kWh/kWp · -0% vs SA41
SA37 (Pembrokeshire)
≈7.9 km away
Local sunshine: ~950 kWh/kWp · +2% vs SA41
SA42 (Pembrokeshire)
≈9.7 km away
Local sunshine: ~953 kWh/kWp · +2% vs SA41
SA35 (Pembrokeshire)
≈9.8 km away
Local sunshine: ~915 kWh/kWp · -2% vs SA41
SA43 (Ceredigion)
≈10.4 km away
Local sunshine: ~977 kWh/kWp · +4% vs SA41
SA66 (Pembrokeshire)
≈13.9 km away
Local sunshine: ~957 kWh/kWp · +2% vs SA41

Similar sunshine across the UK

WV8 (South Staffordshire)
~935 kWh/kWp · +0% vs SA41
B1 (Birmingham)
~935 kWh/kWp · +0% vs SA41
B3 (Birmingham)
~935 kWh/kWp · +0% vs SA41