Independent solar numbers for your postcode using official UK data
Home Regions Guides Get quote
Insights
Big Roof Britain Solar Payback Index Standing Charge Drag Roof Direction Penalty Winter Solar Reality Seasonal Solar Output

Solar panel cost in Neath Port Talbot (SA8)

See realistic solar installation costs, savings and payback for SA8 (Neath Port Talbot) 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
14.9 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£680
What you save every year
Profit Over 25 Years
£6,839
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 23.31p/kWh with a 56.85p/day standing charge. Your postcode’s south-facing sunshine yield is 888 kWh/kW — 80 below the regional median (968).

Read the full story

A typical roof here lands around 5.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 888 kWh per year on a south-facing roof. We value self-used electricity at 23.3p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
23.3p/kWh
Standing charge
56.9p/day
Sunshine yield (south)
888 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: £680, Upfront: £10,173, Break-even: 14.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1776 kWh 710 kWh 1066 kWh £166 £107 £272 £4,069 14.9 yrs £1,375
3 kW 2664 kWh 1066 kWh 1599 kWh £248 £160 £408 £6,104 14.9 yrs £2,062
4 kW 3552 kWh 1421 kWh 2131 kWh £331 £213 £544 £8,138 14.9 yrs £2,749
5 kW 4440 kWh 1776 kWh 2664 kWh £414 £266 £680 £10,173 14.9 yrs £3,436
6 kW 5328 kWh 2131 kWh 3197 kWh £497 £320 £817 £12,207 14.9 yrs £4,124
7 kW 6217 kWh 2487 kWh 3730 kWh £580 £373 £953 £14,242 14.9 yrs £4,811
8 kW 7105 kWh 2842 kWh 4263 kWh £662 £426 £1,089 £16,276 14.9 yrs £5,498

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: £799, Upfront: £12,273, Break-even: 15.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1776 kWh 1066 kWh 710 kWh £248 £71 £319 £6,169 19.3 yrs £220
3 kW 2664 kWh 1599 kWh 1066 kWh £373 £107 £479 £8,204 17.1 yrs £1,380
4 kW 3552 kWh 2131 kWh 1421 kWh £497 £142 £639 £10,238 16.0 yrs £2,540
5 kW 4440 kWh 2664 kWh 1776 kWh £621 £178 £799 £12,273 15.4 yrs £3,700
6 kW 5328 kWh 3197 kWh 2131 kWh £745 £213 £958 £14,307 14.9 yrs £4,861
7 kW 6217 kWh 3730 kWh 2487 kWh £869 £249 £1,118 £16,342 14.6 yrs £6,021
8 kW 7105 kWh 4263 kWh 2842 kWh £994 £284 £1,278 £18,376 14.4 yrs £7,181

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: £858, Upfront: £13,673, Break-even: 15.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1776 kWh 1243 kWh 533 kWh £290 £53 £343 £7,569 22.1 yrs £-707
3 kW 2664 kWh 1865 kWh 799 kWh £435 £80 £515 £9,604 18.7 yrs £689
4 kW 3552 kWh 2487 kWh 1066 kWh £580 £107 £686 £11,638 17.0 yrs £2,086
5 kW 4440 kWh 3108 kWh 1332 kWh £725 £133 £858 £13,673 15.9 yrs £3,482
6 kW 5328 kWh 3730 kWh 1599 kWh £869 £160 £1,029 £15,707 15.3 yrs £4,879
7 kW 6217 kWh 4352 kWh 1865 kWh £1,014 £186 £1,201 £17,742 14.8 yrs £6,275
8 kW 7105 kWh 4973 kWh 2131 kWh £1,159 £213 £1,372 £19,776 14.4 yrs £7,672

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: £875, Upfront: £15,423, Break-even: 17.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1776 kWh 1297 kWh 480 kWh £302 £48 £350 £9,319 26.6 yrs £-2,315
3 kW 2664 kWh 1945 kWh 719 kWh £453 £72 £525 £11,354 21.6 yrs £-848
4 kW 3552 kWh 2593 kWh 959 kWh £604 £96 £700 £13,388 19.1 yrs £620
5 kW 4440 kWh 3241 kWh 1199 kWh £756 £120 £875 £15,423 17.6 yrs £2,087
6 kW 5328 kWh 3890 kWh 1439 kWh £907 £144 £1,051 £17,457 16.6 yrs £3,555
7 kW 6217 kWh 4538 kWh 1678 kWh £1,058 £168 £1,226 £19,492 15.9 yrs £5,022
8 kW 7105 kWh 5186 kWh 1918 kWh £1,209 £192 £1,401 £21,526 15.4 yrs £6,489

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: £887, Upfront: £17,173, Break-even: 19.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1776 kWh 1332 kWh 444 kWh £311 £44 £355 £11,069 31.2 yrs £-3,971
3 kW 2664 kWh 1998 kWh 666 kWh £466 £67 £532 £13,104 24.6 yrs £-2,456
4 kW 3552 kWh 2664 kWh 888 kWh £621 £89 £710 £15,138 21.3 yrs £-941
5 kW 4440 kWh 3330 kWh 1110 kWh £776 £111 £887 £17,173 19.4 yrs £574
6 kW 5328 kWh 3996 kWh 1332 kWh £932 £133 £1,065 £19,207 18.0 yrs £2,088
7 kW 6217 kWh 4662 kWh 1554 kWh £1,087 £155 £1,242 £21,242 17.1 yrs £3,603
8 kW 7105 kWh 5328 kWh 1776 kWh £1,242 £178 £1,420 £23,276 16.4 yrs £5,118

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: £899, Upfront: £19,623, Break-even: 21.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1776 kWh 1368 kWh 409 kWh £319 £41 £360 £13,519 37.6 yrs £-6,326
3 kW 2664 kWh 2051 kWh 613 kWh £478 £61 £539 £15,554 28.8 yrs £-4,764
4 kW 3552 kWh 2735 kWh 817 kWh £638 £82 £719 £17,588 24.5 yrs £-3,202
5 kW 4440 kWh 3419 kWh 1021 kWh £797 £102 £899 £19,623 21.8 yrs £-1,640
6 kW 5328 kWh 4103 kWh 1226 kWh £956 £123 £1,079 £21,657 20.1 yrs £-78
7 kW 6217 kWh 4787 kWh 1430 kWh £1,116 £143 £1,259 £23,692 18.8 yrs £1,484
8 kW 7105 kWh 5471 kWh 1634 kWh £1,275 £163 £1,439 £25,726 17.9 yrs £3,046

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 SA8

Figures below are tailored to SA8 — click through for full league tables.

Big-Roof Britain Rank #957 of 2182
5.1 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #2340 of 2997
13.3 years (UK avg 12.6 years)
~£767 /yr • £10,173 upfront
Standing-Charge Drag Rank #1935 of 2997
25.1% (UK avg 24.6%) drag on savings
£193 fixed • ~£767 /yr value
Aspect Penalty View ranking →
East −19.1% West −19.7%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in SA8

Monthly generation per kilowatt of solar panels

kWh 31 Jan 46 Feb 79 Mar 106 Apr 112 May 111 Jun 106 Jul 94 Aug 82 Sep 55 Oct 38 Nov 27 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 46.8% 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 35 kWh per month; the average month produces around 74 kWh. So a typical 4 kW home system would generate roughly 139 kWh in winter, or 296 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
23.31p/kWh
Daily Fixed Charge
56.85p/day
Local Sunshine
888kWh/kW
A 1 kW system generates ~888 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
5.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 76% • Flats: 14% • Bungalows: 9% Based on 3,149 properties

Coverage

Neath Port Talbot (98%)|Swansea (2%)

Areas Covered

Pontardawe, Rhos, Allt-wen, Trebanos, Godre'r Graig, Clydach

Data Sources & Assumptions

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

Electricity rates: Ofgem price cap, Q1 2026

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

SA10 (Neath Port Talbot)
≈6.1 km away
Local sunshine: ~935 kWh/kWp · +5% vs SA8
SA11 (Neath Port Talbot)
≈7.4 km away
Local sunshine: ~929 kWh/kWp · +5% vs SA8
SA7 (Swansea)
≈7.4 km away
Local sunshine: ~968 kWh/kWp · +9% vs SA8
SA6 (Swansea)
≈7.9 km away
Local sunshine: ~968 kWh/kWp · +9% vs SA8
SA9 (Powys)
≈7.9 km away
Local sunshine: ~873 kWh/kWp · -2% vs SA8
SA99 (Swansea)
≈9.0 km away
Local sunshine: ~968 kWh/kWp · +9% vs SA8

Similar sunshine across the UK

LA1 (Lancaster)
~888 kWh/kWp · +0% vs SA8
PH11 (Perth and Kinross)
~888 kWh/kWp · -0% vs SA8
PH10 (Perth and Kinross)
~888 kWh/kWp · -0% vs SA8