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Solar panel cost in Isle of Anglesey (LL59)

See realistic solar installation costs, savings and payback for LL59 (Isle of Anglesey) 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
11.3 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£863
What you save every year
Profit Over 25 Years
£11,821
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 North Wales and Mersey, the current unit rate is 27.66p/kWh with a 70.76p/day standing charge. Your postcode’s south-facing sunshine yield is 843 kWh/kW — 87 below the regional median (930).

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 843 kWh per year on a south-facing roof. We value self-used electricity at 27.7p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
27.7p/kWh
Standing charge
70.8p/day
Sunshine yield (south)
843 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: £720, Upfront: £8,139, 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 1687 kWh 675 kWh 1012 kWh £187 £101 £288 £3,256 11.3 yrs £2,501
3 kW 2530 kWh 1012 kWh 1518 kWh £280 £152 £432 £4,883 11.3 yrs £3,752
4 kW 3374 kWh 1349 kWh 2024 kWh £373 £202 £576 £6,511 11.3 yrs £5,002
5 kW 4217 kWh 1687 kWh 2530 kWh £467 £253 £720 £8,139 11.3 yrs £6,253
6 kW 5060 kWh 2024 kWh 3036 kWh £560 £304 £863 £9,767 11.3 yrs £7,503
7 kW 5904 kWh 2361 kWh 3542 kWh £653 £354 £1,007 £11,394 11.3 yrs £8,754
8 kW 6747 kWh 2699 kWh 4048 kWh £746 £405 £1,151 £13,022 11.3 yrs £10,004

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: £869, Upfront: £10,239, 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 1687 kWh 1012 kWh 675 kWh £280 £67 £347 £5,356 15.4 yrs £1,593
3 kW 2530 kWh 1518 kWh 1012 kWh £420 £101 £521 £6,983 13.4 yrs £3,439
4 kW 3374 kWh 2024 kWh 1349 kWh £560 £135 £695 £8,611 12.4 yrs £5,285
5 kW 4217 kWh 2530 kWh 1687 kWh £700 £169 £869 £10,239 11.8 yrs £7,131
6 kW 5060 kWh 3036 kWh 2024 kWh £840 £202 £1,042 £11,867 11.4 yrs £8,978
7 kW 5904 kWh 3542 kWh 2361 kWh £980 £236 £1,216 £13,494 11.1 yrs £10,824
8 kW 6747 kWh 4048 kWh 2699 kWh £1,120 £270 £1,390 £15,122 10.9 yrs £12,670

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: £943, Upfront: £11,639, Break-even: 12.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1687 kWh 1181 kWh 506 kWh £327 £51 £377 £6,756 17.9 yrs £788
3 kW 2530 kWh 1771 kWh 759 kWh £490 £76 £566 £8,383 14.8 yrs £2,933
4 kW 3374 kWh 2361 kWh 1012 kWh £653 £101 £754 £10,011 13.3 yrs £5,077
5 kW 4217 kWh 2952 kWh 1265 kWh £816 £127 £943 £11,639 12.3 yrs £7,221
6 kW 5060 kWh 3542 kWh 1518 kWh £980 £152 £1,132 £13,267 11.7 yrs £9,365
7 kW 5904 kWh 4133 kWh 1771 kWh £1,143 £177 £1,320 £14,894 11.3 yrs £11,509
8 kW 6747 kWh 4723 kWh 2024 kWh £1,306 £202 £1,509 £16,522 11.0 yrs £13,653

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: £965, Upfront: £13,389, Break-even: 13.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1687 kWh 1231 kWh 455 kWh £341 £46 £386 £8,506 22.0 yrs £-783
3 kW 2530 kWh 1847 kWh 683 kWh £511 £68 £579 £10,133 17.5 yrs £1,451
4 kW 3374 kWh 2463 kWh 911 kWh £681 £91 £772 £11,761 15.2 yrs £3,684
5 kW 4217 kWh 3078 kWh 1139 kWh £851 £114 £965 £13,389 13.9 yrs £5,918
6 kW 5060 kWh 3694 kWh 1366 kWh £1,022 £137 £1,158 £15,017 13.0 yrs £8,151
7 kW 5904 kWh 4310 kWh 1594 kWh £1,192 £159 £1,351 £16,644 12.3 yrs £10,385
8 kW 6747 kWh 4925 kWh 1822 kWh £1,362 £182 £1,545 £18,272 11.8 yrs £12,618

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: £980, Upfront: £15,139, 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 1687 kWh 1265 kWh 422 kWh £350 £42 £392 £10,256 26.2 yrs £-2,414
3 kW 2530 kWh 1898 kWh 633 kWh £525 £63 £588 £11,883 20.2 yrs £-121
4 kW 3374 kWh 2530 kWh 843 kWh £700 £84 £784 £13,511 17.2 yrs £2,172
5 kW 4217 kWh 3163 kWh 1054 kWh £875 £105 £980 £15,139 15.4 yrs £4,466
6 kW 5060 kWh 3795 kWh 1265 kWh £1,050 £127 £1,176 £16,767 14.3 yrs £6,759
7 kW 5904 kWh 4428 kWh 1476 kWh £1,225 £148 £1,372 £18,394 13.4 yrs £9,052
8 kW 6747 kWh 5060 kWh 1687 kWh £1,400 £169 £1,568 £20,022 12.8 yrs £11,345

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: £995, Upfront: £17,589, Break-even: 17.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1687 kWh 1299 kWh 388 kWh £359 £39 £398 £12,706 31.9 yrs £-4,745
3 kW 2530 kWh 1948 kWh 582 kWh £539 £58 £597 £14,333 24.0 yrs £-2,392
4 kW 3374 kWh 2598 kWh 776 kWh £718 £78 £796 £15,961 20.0 yrs £-39
5 kW 4217 kWh 3247 kWh 970 kWh £898 £97 £995 £17,589 17.7 yrs £2,313
6 kW 5060 kWh 3896 kWh 1164 kWh £1,078 £116 £1,194 £19,217 16.1 yrs £4,666
7 kW 5904 kWh 4546 kWh 1358 kWh £1,257 £136 £1,393 £20,844 15.0 yrs £7,019
8 kW 6747 kWh 5195 kWh 1552 kWh £1,437 £155 £1,592 £22,472 14.1 yrs £9,372

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 Isle of Anglesey

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 LL59

Figures below are tailored to LL59 — click through for full league tables.

Big-Roof Britain Rank #580 of 2182
5.5 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #2225 of 2996
11.3 years (UK avg 10.8 years)
~£863 /yr • £9,767 upfront
Standing-Charge Drag Rank #2136 of 2996
29.9% (UK avg 26.6%) drag on savings
£258 fixed • ~£863 /yr value
Aspect Penalty View ranking →
East −17.7% West −19.1%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL59

Monthly generation per kilowatt of solar panels

kWh 26 Jan 43 Feb 74 Mar 103 Apr 113 May 111 Jun 104 Jul 92 Aug 73 Sep 52 Oct 31 Nov 22 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 43.2% 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 30 kWh per month; the average month produces around 70 kWh. So a typical 4 kW home system would generate roughly 121 kWh in winter, or 281 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
843kWh/kW
A 1 kW system generates ~843 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: 56% • Flats: 22% • Bungalows: 21% Based on 1,667 properties

Coverage

Isle of Anglesey (93%)|Gwynedd (7%)

Areas Covered

Aethwy, Seiriol, Canol Bangor

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 North Wales and Mersey

LL57 (Gwynedd)
≈2.7 km away
Local sunshine: ~792 kWh/kWp · -6% vs LL59
LL56 (Gwynedd)
≈5.8 km away
Local sunshine: ~873 kWh/kWp · +3% vs LL59
LL61 (Isle of Anglesey)
≈6.3 km away
Local sunshine: ~884 kWh/kWp · +5% vs LL59
LL75 (Isle of Anglesey)
≈7.0 km away
Local sunshine: ~931 kWh/kWp · +10% vs LL59
LL58 (Isle of Anglesey)
≈7.0 km away
Local sunshine: ~819 kWh/kWp · -3% vs LL59
LL60 (Isle of Anglesey)
≈7.4 km away
Local sunshine: ~907 kWh/kWp · +8% vs LL59

Similar sunshine across the UK

ML9 (South Lanarkshire)
~843 kWh/kWp · -0% vs LL59
G71 (South Lanarkshire)
~843 kWh/kWp · -0% vs LL59
TD9 (Scottish Borders)
~843 kWh/kWp · -0% vs LL59