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Solar panel cost in Blaenau Gwent (NP22)

See realistic solar installation costs, savings and payback for NP22 (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
10.7 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£760
What you save every year
Profit Over 25 Years
£10,855
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 919 kWh/kW — 49 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 919 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)
919 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: £760, Upfront: £8,139, Break-even: 10.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1838 kWh 735 kWh 1103 kWh £194 £110 £304 £3,256 10.7 yrs £2,823
3 kW 2757 kWh 1103 kWh 1654 kWh £290 £165 £456 £4,883 10.7 yrs £4,234
4 kW 3677 kWh 1471 kWh 2206 kWh £387 £221 £608 £6,511 10.7 yrs £5,645
5 kW 4596 kWh 1838 kWh 2757 kWh £484 £276 £760 £8,139 10.7 yrs £7,056
6 kW 5515 kWh 2206 kWh 3309 kWh £581 £331 £912 £9,767 10.7 yrs £8,468
7 kW 6434 kWh 2574 kWh 3860 kWh £678 £386 £1,064 £11,394 10.7 yrs £9,879
8 kW 7353 kWh 2941 kWh 4412 kWh £774 £441 £1,216 £13,022 10.7 yrs £11,290

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: £910, Upfront: £10,239, Break-even: 11.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1838 kWh 1103 kWh 735 kWh £290 £74 £364 £5,356 14.7 yrs £1,923
3 kW 2757 kWh 1654 kWh 1103 kWh £436 £110 £546 £6,983 12.8 yrs £3,935
4 kW 3677 kWh 2206 kWh 1471 kWh £581 £147 £728 £8,611 11.8 yrs £5,947
5 kW 4596 kWh 2757 kWh 1838 kWh £726 £184 £910 £10,239 11.3 yrs £7,958
6 kW 5515 kWh 3309 kWh 2206 kWh £871 £221 £1,092 £11,867 10.9 yrs £9,970
7 kW 6434 kWh 3860 kWh 2574 kWh £1,016 £257 £1,274 £13,494 10.6 yrs £11,981
8 kW 7353 kWh 4412 kWh 2941 kWh £1,162 £294 £1,456 £15,122 10.4 yrs £13,993

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: £985, Upfront: £11,639, Break-even: 11.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1838 kWh 1287 kWh 551 kWh £339 £55 £394 £6,756 17.1 yrs £1,124
3 kW 2757 kWh 1930 kWh 827 kWh £508 £83 £591 £8,383 14.2 yrs £3,435
4 kW 3677 kWh 2574 kWh 1103 kWh £678 £110 £788 £10,011 12.7 yrs £5,747
5 kW 4596 kWh 3217 kWh 1379 kWh £847 £138 £985 £11,639 11.8 yrs £8,059
6 kW 5515 kWh 3860 kWh 1654 kWh £1,016 £165 £1,182 £13,267 11.2 yrs £10,371
7 kW 6434 kWh 4504 kWh 1930 kWh £1,186 £193 £1,379 £14,894 10.8 yrs £12,683
8 kW 7353 kWh 5147 kWh 2206 kWh £1,355 £221 £1,576 £16,522 10.5 yrs £14,995

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: £1,007, Upfront: £13,389, Break-even: 13.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1838 kWh 1342 kWh 496 kWh £353 £50 £403 £8,506 21.1 yrs £-446
3 kW 2757 kWh 2013 kWh 744 kWh £530 £74 £604 £10,133 16.8 yrs £1,956
4 kW 3677 kWh 2684 kWh 993 kWh £707 £99 £806 £11,761 14.6 yrs £4,357
5 kW 4596 kWh 3355 kWh 1241 kWh £883 £124 £1,007 £13,389 13.3 yrs £6,759
6 kW 5515 kWh 4026 kWh 1489 kWh £1,060 £149 £1,209 £15,017 12.4 yrs £9,161
7 kW 6434 kWh 4697 kWh 1737 kWh £1,237 £174 £1,410 £16,644 11.8 yrs £11,563
8 kW 7353 kWh 5368 kWh 1985 kWh £1,413 £199 £1,612 £18,272 11.3 yrs £13,965

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: £1,022, Upfront: £15,139, 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 1838 kWh 1379 kWh 460 kWh £363 £46 £409 £10,256 25.1 yrs £-2,076
3 kW 2757 kWh 2068 kWh 689 kWh £545 £69 £613 £11,883 19.4 yrs £386
4 kW 3677 kWh 2757 kWh 919 kWh £726 £92 £818 £13,511 16.5 yrs £2,848
5 kW 4596 kWh 3447 kWh 1149 kWh £908 £115 £1,022 £15,139 14.8 yrs £5,310
6 kW 5515 kWh 4136 kWh 1379 kWh £1,089 £138 £1,227 £16,767 13.7 yrs £7,771
7 kW 6434 kWh 4825 kWh 1608 kWh £1,271 £161 £1,431 £18,394 12.9 yrs £10,233
8 kW 7353 kWh 5515 kWh 1838 kWh £1,452 £184 £1,636 £20,022 12.2 yrs £12,695

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: £1,037, Upfront: £17,589, Break-even: 17.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1838 kWh 1415 kWh 423 kWh £373 £42 £415 £12,706 30.6 yrs £-4,406
3 kW 2757 kWh 2123 kWh 634 kWh £559 £63 £622 £14,333 23.0 yrs £-1,884
4 kW 3677 kWh 2831 kWh 846 kWh £745 £85 £830 £15,961 19.2 yrs £638
5 kW 4596 kWh 3539 kWh 1057 kWh £932 £106 £1,037 £17,589 17.0 yrs £3,160
6 kW 5515 kWh 4246 kWh 1268 kWh £1,118 £127 £1,245 £19,217 15.4 yrs £5,682
7 kW 6434 kWh 4954 kWh 1480 kWh £1,304 £148 £1,452 £20,844 14.4 yrs £8,204
8 kW 7353 kWh 5662 kWh 1691 kWh £1,491 £169 £1,660 £22,472 13.5 yrs £10,726

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 NP22

Figures below are tailored to NP22 — click through for full league tables.

Big-Roof Britain Rank #1239 of 2182
4.9 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #1715 of 2996
10.7 years (UK avg 10.8 years)
~£760 /yr • £8,139 upfront
Standing-Charge Drag Rank #1842 of 2996
27.8% (UK avg 26.6%) drag on savings
£211 fixed • ~£760 /yr value
Aspect Penalty View ranking →
East −18.7% West −18.7%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in NP22

Monthly generation per kilowatt of solar panels

kWh 33 Jan 46 Feb 82 Mar 108 Apr 116 May 113 Jun 112 Jul 100 Aug 86 Sep 57 Oct 39 Nov 28 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 36 kWh per month; the average month produces around 77 kWh. So a typical 4 kW home system would generate roughly 143 kWh in winter, or 306 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.33p/kWh
Daily Fixed Charge
57.84p/day
Local Sunshine
919kWh/kW
A 1 kW system generates ~919 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: 75% • Flats: 14% • Bungalows: 10% Based on 5,151 properties

Coverage

Blaenau Gwent (70%)|Caerphilly (30%)

Areas Covered

Tredegar, Sirhowy, Twyn Carno, Moriah and Pontlottyn, Georgetown, Rassau and Garnlydan

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)
≈3.5 km away
Local sunshine: ~922 kWh/kWp · +0% vs NP22
NP3 (Blaenau Gwent)
≈5.2 km away
Local sunshine: ~928 kWh/kWp · +1% vs NP22
NP24 (Caerphilly)
≈5.7 km away
Local sunshine: ~881 kWh/kWp · -4% vs NP22
NP2 (Caerphilly)
≈7.7 km away
Local sunshine: ~918 kWh/kWp · -0% vs NP22
CF48 (Merthyr Tydfil)
≈7.9 km away
Local sunshine: ~899 kWh/kWp · -2% vs NP22
NP13 (Blaenau Gwent)
≈8.8 km away
Local sunshine: ~933 kWh/kWp · +2% vs NP22

Similar sunshine across the UK

LS7 (Leeds)
~919 kWh/kWp · +0% vs NP22
NE11 (Gateshead)
~919 kWh/kWp · +0% vs NP22
L39 (West Lancashire)
~919 kWh/kWp · -0% vs NP22