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Solar panel cost in Pembrokeshire (SA73)

See realistic solar installation costs, savings and payback for SA73 (Pembrokeshire) in under a minute using official UK data. Start with the calculator, then get a no-obligation quote from an MCS-certified installer. You can also ask the SolarByPostcode assistant to sanity-check your roof, bills and plans.

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
9.4 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£1,043
What you save every year
Profit Over 25 Years
£16,307
After paying itself off, you're this much ahead

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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: The official cost per kW is lower above 4 kW, so a 5–6 kW system can pay back a little faster than a 3–4 kW system on otherwise identical assumptions.
  • 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

Panel costs: Uses March 2026 TIC mean installation costs: £1,827/kW up to 4 kW and £1,628/kW above 4 kW.

Other costs: Battery prices are modelled at £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 26.33p/kWh with a 57.84p/day standing charge. Your postcode’s south-facing sunshine yield is 1051 kWh/kW — 83 above 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 1051 kWh per year on a south-facing roof. We value self-used electricity at 26.3p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.3p/kWh
Standing charge
57.8p/day
Sunshine yield (south)
1051 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: £869, Upfront: £8,139, Break-even: 9.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2103 kWh 841 kWh 1262 kWh £221 £126 £348 £3,256 9.4 yrs £3,697
3 kW 3154 kWh 1262 kWh 1893 kWh £332 £189 £521 £4,883 9.4 yrs £5,546
4 kW 4206 kWh 1682 kWh 2523 kWh £443 £252 £695 £6,511 9.4 yrs £7,395
5 kW 5257 kWh 2103 kWh 3154 kWh £554 £315 £869 £8,139 9.4 yrs £9,244
6 kW 6309 kWh 2523 kWh 3785 kWh £664 £379 £1,043 £9,767 9.4 yrs £11,092
7 kW 7360 kWh 2944 kWh 4416 kWh £775 £442 £1,217 £11,394 9.4 yrs £12,941
8 kW 8412 kWh 3365 kWh 5047 kWh £886 £505 £1,391 £13,022 9.4 yrs £14,790

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £1,041, Upfront: £10,239, Break-even: 9.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2103 kWh 1262 kWh 841 kWh £332 £84 £416 £5,356 12.9 yrs £2,971
3 kW 3154 kWh 1893 kWh 1262 kWh £498 £126 £624 £6,983 11.2 yrs £5,507
4 kW 4206 kWh 2523 kWh 1682 kWh £664 £168 £833 £8,611 10.3 yrs £8,042
5 kW 5257 kWh 3154 kWh 2103 kWh £831 £210 £1,041 £10,239 9.8 yrs £10,578
6 kW 6309 kWh 3785 kWh 2523 kWh £997 £252 £1,249 £11,867 9.5 yrs £13,113
7 kW 7360 kWh 4416 kWh 2944 kWh £1,163 £294 £1,457 £13,494 9.3 yrs £15,649
8 kW 8412 kWh 5047 kWh 3365 kWh £1,329 £336 £1,665 £15,122 9.1 yrs £18,184

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £1,127, Upfront: £11,639, Break-even: 10.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2103 kWh 1472 kWh 631 kWh £388 £63 £451 £6,756 15.0 yrs £2,258
3 kW 3154 kWh 2208 kWh 946 kWh £581 £95 £676 £8,383 12.4 yrs £5,137
4 kW 4206 kWh 2944 kWh 1262 kWh £775 £126 £901 £10,011 11.1 yrs £8,016
5 kW 5257 kWh 3680 kWh 1577 kWh £969 £158 £1,127 £11,639 10.3 yrs £10,895
6 kW 6309 kWh 4416 kWh 1893 kWh £1,163 £189 £1,352 £13,267 9.8 yrs £13,774
7 kW 7360 kWh 5152 kWh 2208 kWh £1,357 £221 £1,577 £14,894 9.4 yrs £16,652
8 kW 8412 kWh 5888 kWh 2523 kWh £1,550 £252 £1,803 £16,522 9.2 yrs £19,531

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,152, Upfront: £13,389, Break-even: 11.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2103 kWh 1535 kWh 568 kWh £404 £57 £461 £8,506 18.5 yrs £714
3 kW 3154 kWh 2303 kWh 852 kWh £606 £85 £691 £10,133 14.7 yrs £3,696
4 kW 4206 kWh 3070 kWh 1136 kWh £808 £114 £922 £11,761 12.8 yrs £6,678
5 kW 5257 kWh 3838 kWh 1419 kWh £1,010 £142 £1,152 £13,389 11.6 yrs £9,660
6 kW 6309 kWh 4605 kWh 1703 kWh £1,213 £170 £1,383 £15,017 10.9 yrs £12,642
7 kW 7360 kWh 5373 kWh 1987 kWh £1,415 £199 £1,613 £16,644 10.3 yrs £15,624
8 kW 8412 kWh 6140 kWh 2271 kWh £1,617 £227 £1,844 £18,272 9.9 yrs £18,606

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,170, Upfront: £15,139, Break-even: 12.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2103 kWh 1577 kWh 526 kWh £415 £53 £468 £10,256 21.9 yrs £-899
3 kW 3154 kWh 2366 kWh 789 kWh £623 £79 £702 £11,883 16.9 yrs £2,152
4 kW 4206 kWh 3154 kWh 1051 kWh £831 £105 £936 £13,511 14.4 yrs £5,202
5 kW 5257 kWh 3943 kWh 1314 kWh £1,038 £131 £1,170 £15,139 12.9 yrs £8,253
6 kW 6309 kWh 4731 kWh 1577 kWh £1,246 £158 £1,404 £16,767 11.9 yrs £11,304
7 kW 7360 kWh 5520 kWh 1840 kWh £1,453 £184 £1,637 £18,394 11.2 yrs £14,354
8 kW 8412 kWh 6309 kWh 2103 kWh £1,661 £210 £1,871 £20,022 10.7 yrs £17,405

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,187, Upfront: £17,589, 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 2103 kWh 1619 kWh 484 kWh £426 £48 £475 £12,706 26.8 yrs £-3,211
3 kW 3154 kWh 2429 kWh 725 kWh £640 £73 £712 £14,333 20.1 yrs £-92
4 kW 4206 kWh 3238 kWh 967 kWh £853 £97 £949 £15,961 16.8 yrs £3,027
5 kW 5257 kWh 4048 kWh 1209 kWh £1,066 £121 £1,187 £17,589 14.8 yrs £6,147
6 kW 6309 kWh 4858 kWh 1451 kWh £1,279 £145 £1,424 £19,217 13.5 yrs £9,266
7 kW 7360 kWh 5667 kWh 1693 kWh £1,492 £169 £1,661 £20,844 12.5 yrs £12,385
8 kW 8412 kWh 6477 kWh 1935 kWh £1,705 £193 £1,899 £22,472 11.8 yrs £15,504

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, 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.

Before you request quotes in Pembrokeshire

Use the numbers above to sanity-check installer quotes. The main things to compare are system size, battery assumptions, payback claims, MCS certification, DNO paperwork and export assumptions.

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Insights for SA73

Figures below are tailored to SA73 — click through for full league tables.

Big-Roof Britain Rank #488 of 2182
5.6 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #245 of 2996
9.4 years (UK avg 10.8 years)
~£1,043 /yr • £9,767 upfront
Standing-Charge Drag Rank #620 of 2996
20.2% (UK avg 26.6%) drag on savings
£211 fixed • ~£1,043 /yr value
Aspect Penalty View ranking →
East −18.9% West −22.5%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in SA73

Monthly generation per kilowatt of solar panels

kWh 36 Jan 56 Feb 90 Mar 123 Apr 136 May 133 Jun 130 Jul 117 Aug 94 Sep 65 Oct 41 Nov 30 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 46.4% of an average month (Dec–Feb)

Best / worst month: May / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 41 kWh per month; the average month produces around 88 kWh. So a typical 4 kW home system would generate roughly 163 kWh in winter, or 350 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.33p/kWh
Daily Fixed Charge
57.84p/day
Local Sunshine
1051kWh/kW
A 1 kW system generates ~1051 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: 64% • Flats: 17% • Bungalows: 18% Based on 5,392 properties

Coverage

Pembrokeshire (100%)

Areas Covered

Milford: Central, Milford: Hakin, Neyland: West, Milford: North, Milford: West, Milford: Hubberston, Neyland: East, Milford: East + 3 more

Data Sources & Assumptions

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

Electricity rates: Ofgem price cap, Q3 2026

Installation costs: DESNZ/MCS data, March 2026 (TIC)

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

SA72 (Pembrokeshire)
≈6.6 km away
Local sunshine: ~1,040 kWh/kWp · -1% vs SA73
SA71 (Pembrokeshire)
≈9.0 km away
Local sunshine: ~1,039 kWh/kWp · -1% vs SA73
SA61 (Pembrokeshire)
≈10.3 km away
Local sunshine: ~984 kWh/kWp · -6% vs SA73
SA62 (Pembrokeshire)
≈14.4 km away
Local sunshine: ~1,029 kWh/kWp · -2% vs SA73
SA68 (Pembrokeshire)
≈19.7 km away
Local sunshine: ~1,014 kWh/kWp · -4% vs SA73
SA63 (Pembrokeshire)
≈20.5 km away
Local sunshine: ~979 kWh/kWp · -7% vs SA73

Similar sunshine across the UK

IP16 (East Suffolk)
~1,051 kWh/kWp · +0% vs SA73
SO45 (New Forest)
~1,052 kWh/kWp · +0% vs SA73
TN19 (Rother)
~1,052 kWh/kWp · +0% vs SA73