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Solar panel cost in Isle of Anglesey (LL61)

See realistic solar installation costs, savings and payback for LL61 (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
10.8 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£754
What you save every year
Profit Over 25 Years
£10,720
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 884 kWh/kW — 46 below the regional median (930).

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 884 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)
884 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: £754, Upfront: £8,139, Break-even: 10.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1768 kWh 707 kWh 1061 kWh £196 £106 £302 £3,256 10.8 yrs £2,779
3 kW 2652 kWh 1061 kWh 1591 kWh £293 £159 £453 £4,883 10.8 yrs £4,169
4 kW 3537 kWh 1415 kWh 2122 kWh £391 £212 £603 £6,511 10.8 yrs £5,558
5 kW 4421 kWh 1768 kWh 2652 kWh £489 £265 £754 £8,139 10.8 yrs £6,948
6 kW 5305 kWh 2122 kWh 3183 kWh £587 £318 £905 £9,767 10.8 yrs £8,338
7 kW 6189 kWh 2476 kWh 3713 kWh £685 £371 £1,056 £11,394 10.8 yrs £9,727
8 kW 7073 kWh 2829 kWh 4244 kWh £783 £424 £1,207 £13,022 10.8 yrs £11,117

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: 11.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1768 kWh 1061 kWh 707 kWh £293 £71 £364 £5,356 14.7 yrs £1,928
3 kW 2652 kWh 1591 kWh 1061 kWh £440 £106 £546 £6,983 12.8 yrs £3,942
4 kW 3537 kWh 2122 kWh 1415 kWh £587 £141 £728 £8,611 11.8 yrs £5,957
5 kW 4421 kWh 2652 kWh 1768 kWh £734 £177 £910 £10,239 11.2 yrs £7,971
6 kW 5305 kWh 3183 kWh 2122 kWh £880 £212 £1,093 £11,867 10.9 yrs £9,985
7 kW 6189 kWh 3713 kWh 2476 kWh £1,027 £248 £1,275 £13,494 10.6 yrs £11,999
8 kW 7073 kWh 4244 kWh 2829 kWh £1,174 £283 £1,457 £15,122 10.4 yrs £14,013

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: £989, 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 1768 kWh 1238 kWh 530 kWh £342 £53 £395 £6,756 17.1 yrs £1,153
3 kW 2652 kWh 1857 kWh 796 kWh £514 £80 £593 £8,383 14.1 yrs £3,479
4 kW 3537 kWh 2476 kWh 1061 kWh £685 £106 £791 £10,011 12.7 yrs £5,806
5 kW 4421 kWh 3094 kWh 1326 kWh £856 £133 £989 £11,639 11.8 yrs £8,132
6 kW 5305 kWh 3713 kWh 1591 kWh £1,027 £159 £1,186 £13,267 11.2 yrs £10,459
7 kW 6189 kWh 4332 kWh 1857 kWh £1,198 £186 £1,384 £14,894 10.8 yrs £12,785
8 kW 7073 kWh 4951 kWh 2122 kWh £1,369 £212 £1,582 £16,522 10.4 yrs £15,111

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: £1,012, 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 1768 kWh 1291 kWh 477 kWh £357 £48 £405 £8,506 21.0 yrs £-410
3 kW 2652 kWh 1936 kWh 716 kWh £536 £72 £607 £10,133 16.7 yrs £2,010
4 kW 3537 kWh 2582 kWh 955 kWh £714 £95 £810 £11,761 14.5 yrs £4,430
5 kW 4421 kWh 3227 kWh 1194 kWh £893 £119 £1,012 £13,389 13.2 yrs £6,851
6 kW 5305 kWh 3872 kWh 1432 kWh £1,071 £143 £1,214 £15,017 12.4 yrs £9,271
7 kW 6189 kWh 4518 kWh 1671 kWh £1,250 £167 £1,417 £16,644 11.7 yrs £11,691
8 kW 7073 kWh 5163 kWh 1910 kWh £1,428 £191 £1,619 £18,272 11.3 yrs £14,111

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: £1,028, 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 1768 kWh 1326 kWh 442 kWh £367 £44 £411 £10,256 25.0 yrs £-2,035
3 kW 2652 kWh 1989 kWh 663 kWh £550 £66 £617 £11,883 19.3 yrs £448
4 kW 3537 kWh 2652 kWh 884 kWh £734 £88 £822 £13,511 16.4 yrs £2,930
5 kW 4421 kWh 3315 kWh 1105 kWh £917 £111 £1,028 £15,139 14.7 yrs £5,413
6 kW 5305 kWh 3979 kWh 1326 kWh £1,100 £133 £1,233 £16,767 13.6 yrs £7,895
7 kW 6189 kWh 4642 kWh 1547 kWh £1,284 £155 £1,439 £18,394 12.8 yrs £10,378
8 kW 7073 kWh 5305 kWh 1768 kWh £1,467 £177 £1,644 £20,022 12.2 yrs £12,860

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: £1,043, Upfront: £17,589, Break-even: 16.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1768 kWh 1362 kWh 407 kWh £377 £41 £417 £12,706 30.4 yrs £-4,360
3 kW 2652 kWh 2042 kWh 610 kWh £565 £61 £626 £14,333 22.9 yrs £-1,815
4 kW 3537 kWh 2723 kWh 813 kWh £753 £81 £835 £15,961 19.1 yrs £730
5 kW 4421 kWh 3404 kWh 1017 kWh £942 £102 £1,043 £17,589 16.9 yrs £3,275
6 kW 5305 kWh 4085 kWh 1220 kWh £1,130 £122 £1,252 £19,217 15.4 yrs £5,820
7 kW 6189 kWh 4765 kWh 1423 kWh £1,318 £142 £1,460 £20,844 14.3 yrs £8,365
8 kW 7073 kWh 5446 kWh 1627 kWh £1,506 £163 £1,669 £22,472 13.5 yrs £10,910

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 LL61

Figures below are tailored to LL61 — click through for full league tables.

Big-Roof Britain Rank #400 of 2182
5.7 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #1796 of 2996
10.8 years (UK avg 10.8 years)
~£754 /yr • £8,139 upfront
Standing-Charge Drag Rank #2562 of 2996
34.2% (UK avg 26.6%) drag on savings
£258 fixed • ~£754 /yr value
Aspect Penalty View ranking →
East −17.9% West −20.1%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL61

Monthly generation per kilowatt of solar panels

kWh 28 Jan 46 Feb 77 Mar 106 Apr 118 May 115 Jun 109 Jul 96 Aug 77 Sep 55 Oct 33 Nov 24 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 44.1% 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 32 kWh per month; the average month produces around 74 kWh. So a typical 4 kW home system would generate roughly 130 kWh in winter, or 295 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
884kWh/kW
A 1 kW system generates ~884 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: 62% • Flats: 5% • Bungalows: 33% Based on 1,880 properties

Coverage

Isle of Anglesey (99%)|Gwynedd (1%)

Areas Covered

Aethwy, Bro Aberffraw, Bodowyr, 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

LL56 (Gwynedd)
≈2.1 km away
Local sunshine: ~873 kWh/kWp · -1% vs LL61
LL60 (Isle of Anglesey)
≈3.8 km away
Local sunshine: ~907 kWh/kWp · +3% vs LL61
LL55 (Gwynedd)
≈6.1 km away
Local sunshine: ~859 kWh/kWp · -3% vs LL61
LL59 (Isle of Anglesey)
≈6.3 km away
Local sunshine: ~843 kWh/kWp · -5% vs LL61
LL57 (Gwynedd)
≈7.8 km away
Local sunshine: ~792 kWh/kWp · -10% vs LL61
LL77 (Isle of Anglesey)
≈8.4 km away
Local sunshine: ~966 kWh/kWp · +9% vs LL61

Similar sunshine across the UK

TD1 (Scottish Borders)
~884 kWh/kWp · +0% vs LL61
PA76 (Argyll and Bute)
~884 kWh/kWp · -0% vs LL61
M32 (Trafford)
~884 kWh/kWp · -0% vs LL61