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Solar panel cost in Blaenau Gwent (NP3)

See realistic solar installation costs, savings and payback for NP3 (Blaenau Gwent) 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
10.6 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£767
What you save every year
Profit Over 25 Years
£11,038
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 928 kWh/kW — 41 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 928 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)
928 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: £767, Upfront: £8,139, Break-even: 10.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1856 kWh 742 kWh 1114 kWh £195 £111 £307 £3,256 10.6 yrs £2,881
3 kW 2784 kWh 1114 kWh 1670 kWh £293 £167 £460 £4,883 10.6 yrs £4,322
4 kW 3712 kWh 1485 kWh 2227 kWh £391 £223 £614 £6,511 10.6 yrs £5,762
5 kW 4640 kWh 1856 kWh 2784 kWh £489 £278 £767 £8,139 10.6 yrs £7,203
6 kW 5568 kWh 2227 kWh 3341 kWh £586 £334 £920 £9,767 10.6 yrs £8,643
7 kW 6496 kWh 2598 kWh 3898 kWh £684 £390 £1,074 £11,394 10.6 yrs £10,084
8 kW 7424 kWh 2970 kWh 4454 kWh £782 £445 £1,227 £13,022 10.6 yrs £11,524

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: £919, Upfront: £10,239, Break-even: 11.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1856 kWh 1114 kWh 742 kWh £293 £74 £367 £5,356 14.6 yrs £1,993
3 kW 2784 kWh 1670 kWh 1114 kWh £440 £111 £551 £6,983 12.7 yrs £4,040
4 kW 3712 kWh 2227 kWh 1485 kWh £586 £148 £735 £8,611 11.7 yrs £6,087
5 kW 4640 kWh 2784 kWh 1856 kWh £733 £186 £919 £10,239 11.1 yrs £8,133
6 kW 5568 kWh 3341 kWh 2227 kWh £880 £223 £1,102 £11,867 10.8 yrs £10,180
7 kW 6496 kWh 3898 kWh 2598 kWh £1,026 £260 £1,286 £13,494 10.5 yrs £12,227
8 kW 7424 kWh 4454 kWh 2970 kWh £1,173 £297 £1,470 £15,122 10.3 yrs £14,273

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: £994, Upfront: £11,639, Break-even: 11.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1856 kWh 1299 kWh 557 kWh £342 £56 £398 £6,756 17.0 yrs £1,199
3 kW 2784 kWh 1949 kWh 835 kWh £513 £84 £597 £8,383 14.1 yrs £3,549
4 kW 3712 kWh 2598 kWh 1114 kWh £684 £111 £796 £10,011 12.6 yrs £5,899
5 kW 4640 kWh 3248 kWh 1392 kWh £855 £139 £994 £11,639 11.7 yrs £8,249
6 kW 5568 kWh 3898 kWh 1670 kWh £1,026 £167 £1,193 £13,267 11.1 yrs £10,598
7 kW 6496 kWh 4547 kWh 1949 kWh £1,197 £195 £1,392 £14,894 10.7 yrs £12,948
8 kW 7424 kWh 5197 kWh 2227 kWh £1,368 £223 £1,591 £16,522 10.4 yrs £15,298

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: £1,017, Upfront: £13,389, Break-even: 13.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1856 kWh 1355 kWh 501 kWh £357 £50 £407 £8,506 20.9 yrs £-369
3 kW 2784 kWh 2032 kWh 752 kWh £535 £75 £610 £10,133 16.6 yrs £2,072
4 kW 3712 kWh 2710 kWh 1002 kWh £713 £100 £814 £11,761 14.5 yrs £4,513
5 kW 4640 kWh 3387 kWh 1253 kWh £892 £125 £1,017 £13,389 13.2 yrs £6,953
6 kW 5568 kWh 4065 kWh 1503 kWh £1,070 £150 £1,221 £15,017 12.3 yrs £9,394
7 kW 6496 kWh 4742 kWh 1754 kWh £1,249 £175 £1,424 £16,644 11.7 yrs £11,835
8 kW 7424 kWh 5419 kWh 2004 kWh £1,427 £200 £1,627 £18,272 11.2 yrs £14,275

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: £1,032, Upfront: £15,139, Break-even: 14.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1856 kWh 1392 kWh 464 kWh £367 £46 £413 £10,256 24.8 yrs £-1,997
3 kW 2784 kWh 2088 kWh 696 kWh £550 £70 £619 £11,883 19.2 yrs £504
4 kW 3712 kWh 2784 kWh 928 kWh £733 £93 £826 £13,511 16.4 yrs £3,005
5 kW 4640 kWh 3480 kWh 1160 kWh £916 £116 £1,032 £15,139 14.7 yrs £5,506
6 kW 5568 kWh 4176 kWh 1392 kWh £1,100 £139 £1,239 £16,767 13.5 yrs £8,008
7 kW 6496 kWh 4872 kWh 1624 kWh £1,283 £162 £1,445 £18,394 12.7 yrs £10,509
8 kW 7424 kWh 5568 kWh 1856 kWh £1,466 £186 £1,652 £20,022 12.1 yrs £13,010

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: £1,047, Upfront: £17,589, Break-even: 16.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1856 kWh 1429 kWh 427 kWh £376 £43 £419 £12,706 30.3 yrs £-4,326
3 kW 2784 kWh 2144 kWh 640 kWh £564 £64 £628 £14,333 22.8 yrs £-1,764
4 kW 3712 kWh 2858 kWh 854 kWh £753 £85 £838 £15,961 19.0 yrs £798
5 kW 4640 kWh 3573 kWh 1067 kWh £941 £107 £1,047 £17,589 16.8 yrs £3,360
6 kW 5568 kWh 4287 kWh 1281 kWh £1,129 £128 £1,257 £19,217 15.3 yrs £5,921
7 kW 6496 kWh 5002 kWh 1494 kWh £1,317 £149 £1,466 £20,844 14.2 yrs £8,483
8 kW 7424 kWh 5716 kWh 1707 kWh £1,505 £171 £1,676 £22,472 13.4 yrs £11,045

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 Blaenau Gwent

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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Understand DNO, G98 and G99 export limits

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Insights for NP3

Figures below are tailored to NP3 — click through for full league tables.

Solar Payback Index Rank #1631 of 2996
10.6 years (UK avg 10.8 years)
~£767 /yr • £8,139 upfront
Standing-Charge Drag Rank #1805 of 2996
27.5% (UK avg 26.6%) drag on savings
£211 fixed • ~£767 /yr value
Aspect Penalty View ranking →
East −20.0% West −20.5%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in NP3

Monthly generation per kilowatt of solar panels

kWh 30 Jan 45 Feb 81 Mar 109 Apr 118 May 117 Jun 118 Jul 104 Aug 88 Sep 57 Oct 37 Nov 24 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 42.9% of an average month (Dec–Feb)

Best / worst month: Jul / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 33 kWh per month; the average month produces around 77 kWh. So a typical 4 kW home system would generate roughly 133 kWh in winter, or 309 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.33p/kWh
Daily Fixed Charge
57.84p/day
Local Sunshine
928kWh/kW
A 1 kW system generates ~928 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

No EPC data available for this outcode

Coverage

Blaenau Gwent (98%)|Caerphilly (2%)

Areas Covered

Abertillery and Six Bells, Ebbw Vale South, Brynmawr, Beaufort, Nantyglo, Blaina, Cwmtillery, Ebbw Vale North + 4 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

NP23 (Blaenau Gwent)
≈2.5 km away
Local sunshine: ~922 kWh/kWp · -1% vs NP3
NP22 (Blaenau Gwent)
≈5.2 km away
Local sunshine: ~919 kWh/kWp · -1% vs NP3
NP13 (Blaenau Gwent)
≈5.3 km away
Local sunshine: ~933 kWh/kWp · +1% vs NP3
NP24 (Caerphilly)
≈7.7 km away
Local sunshine: ~881 kWh/kWp · -5% vs NP3
NP2 (Caerphilly)
≈8.7 km away
Local sunshine: ~918 kWh/kWp · -1% vs NP3
NP8 (Powys)
≈9.5 km away
Local sunshine: ~953 kWh/kWp · +3% vs NP3

Similar sunshine across the UK

WV1 (Wolverhampton)
~928 kWh/kWp · +0% vs NP3
WV10 (Wolverhampton)
~928 kWh/kWp · +0% vs NP3
WV2 (Wolverhampton)
~928 kWh/kWp · -0% vs NP3