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Solar panel cost in Isle of Anglesey (LL75)

See realistic solar installation costs, savings and payback for LL75 (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
10.2 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£953
What you save every year
Profit Over 25 Years
£14,055
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 931 kWh/kW — 1 above 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 931 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)
931 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: £794, Upfront: £8,139, Break-even: 10.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1861 kWh 745 kWh 1117 kWh £206 £112 £318 £3,256 10.2 yrs £3,097
3 kW 2792 kWh 1117 kWh 1675 kWh £309 £168 £476 £4,883 10.2 yrs £4,645
4 kW 3723 kWh 1489 kWh 2234 kWh £412 £223 £635 £6,511 10.2 yrs £6,194
5 kW 4653 kWh 1861 kWh 2792 kWh £515 £279 £794 £8,139 10.2 yrs £7,742
6 kW 5584 kWh 2234 kWh 3350 kWh £618 £335 £953 £9,767 10.2 yrs £9,290
7 kW 6515 kWh 2606 kWh 3909 kWh £721 £391 £1,112 £11,394 10.2 yrs £10,839
8 kW 7445 kWh 2978 kWh 4467 kWh £824 £447 £1,270 £13,022 10.2 yrs £12,387

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: £958, Upfront: £10,239, 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 1861 kWh 1117 kWh 745 kWh £309 £74 £383 £5,356 14.0 yrs £2,312
3 kW 2792 kWh 1675 kWh 1117 kWh £463 £112 £575 £6,983 12.1 yrs £4,517
4 kW 3723 kWh 2234 kWh 1489 kWh £618 £149 £767 £8,611 11.2 yrs £6,723
5 kW 4653 kWh 2792 kWh 1861 kWh £772 £186 £958 £10,239 10.7 yrs £8,929
6 kW 5584 kWh 3350 kWh 2234 kWh £927 £223 £1,150 £11,867 10.3 yrs £11,135
7 kW 6515 kWh 3909 kWh 2606 kWh £1,081 £261 £1,342 £13,494 10.1 yrs £13,341
8 kW 7445 kWh 4467 kWh 2978 kWh £1,236 £298 £1,533 £15,122 9.9 yrs £15,547

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: £1,041, Upfront: £11,639, 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 1861 kWh 1303 kWh 558 kWh £360 £56 £416 £6,756 16.2 yrs £1,569
3 kW 2792 kWh 1954 kWh 838 kWh £541 £84 £624 £8,383 13.4 yrs £4,104
4 kW 3723 kWh 2606 kWh 1117 kWh £721 £112 £832 £10,011 12.0 yrs £6,638
5 kW 4653 kWh 3257 kWh 1396 kWh £901 £140 £1,041 £11,639 11.2 yrs £9,173
6 kW 5584 kWh 3909 kWh 1675 kWh £1,081 £168 £1,249 £13,267 10.6 yrs £11,707
7 kW 6515 kWh 4560 kWh 1954 kWh £1,261 £195 £1,457 £14,894 10.2 yrs £14,242
8 kW 7445 kWh 5212 kWh 2234 kWh £1,442 £223 £1,665 £16,522 9.9 yrs £16,776

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: £1,065, Upfront: £13,389, Break-even: 12.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1861 kWh 1359 kWh 503 kWh £376 £50 £426 £8,506 20.0 yrs £16
3 kW 2792 kWh 2038 kWh 754 kWh £564 £75 £639 £10,133 15.9 yrs £2,649
4 kW 3723 kWh 2718 kWh 1005 kWh £752 £101 £852 £11,761 13.8 yrs £5,283
5 kW 4653 kWh 3397 kWh 1256 kWh £940 £126 £1,065 £13,389 12.6 yrs £7,916
6 kW 5584 kWh 4076 kWh 1508 kWh £1,128 £151 £1,278 £15,017 11.7 yrs £10,549
7 kW 6515 kWh 4756 kWh 1759 kWh £1,315 £176 £1,491 £16,644 11.2 yrs £13,182
8 kW 7445 kWh 5435 kWh 2010 kWh £1,503 £201 £1,704 £18,272 10.7 yrs £15,815

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: £1,082, Upfront: £15,139, Break-even: 14.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1861 kWh 1396 kWh 465 kWh £386 £47 £433 £10,256 23.7 yrs £-1,602
3 kW 2792 kWh 2094 kWh 698 kWh £579 £70 £649 £11,883 18.3 yrs £1,097
4 kW 3723 kWh 2792 kWh 931 kWh £772 £93 £865 £13,511 15.6 yrs £3,796
5 kW 4653 kWh 3490 kWh 1163 kWh £965 £116 £1,082 £15,139 14.0 yrs £6,494
6 kW 5584 kWh 4188 kWh 1396 kWh £1,158 £140 £1,298 £16,767 12.9 yrs £9,193
7 kW 6515 kWh 4886 kWh 1629 kWh £1,351 £163 £1,514 £18,394 12.1 yrs £11,892
8 kW 7445 kWh 5584 kWh 1861 kWh £1,545 £186 £1,731 £20,022 11.6 yrs £14,591

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: £1,098, Upfront: £17,589, Break-even: 16.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1861 kWh 1433 kWh 428 kWh £396 £43 £439 £12,706 28.9 yrs £-3,921
3 kW 2792 kWh 2150 kWh 642 kWh £595 £64 £659 £14,333 21.8 yrs £-1,156
4 kW 3723 kWh 2866 kWh 856 kWh £793 £86 £878 £15,961 18.2 yrs £1,608
5 kW 4653 kWh 3583 kWh 1070 kWh £991 £107 £1,098 £17,589 16.0 yrs £4,373
6 kW 5584 kWh 4300 kWh 1284 kWh £1,189 £128 £1,318 £19,217 14.6 yrs £7,138
7 kW 6515 kWh 5016 kWh 1498 kWh £1,387 £150 £1,537 £20,844 13.6 yrs £9,902
8 kW 7445 kWh 5733 kWh 1712 kWh £1,586 £171 £1,757 £22,472 12.8 yrs £12,667

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 LL75

Figures below are tailored to LL75 — click through for full league tables.

Big-Roof Britain Rank #278 of 2182
6.0 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #1293 of 2996
10.2 years (UK avg 10.8 years)
~£953 /yr • £9,767 upfront
Standing-Charge Drag Rank #1763 of 2996
27.1% (UK avg 26.6%) drag on savings
£258 fixed • ~£953 /yr value
Aspect Penalty View ranking →
East −18.7% West −21.4%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL75

Monthly generation per kilowatt of solar panels

kWh 31 Jan 50 Feb 81 Mar 110 Apr 123 May 119 Jun 114 Jul 101 Aug 82 Sep 59 Oct 35 Nov 26 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 45.7% 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 78 kWh. So a typical 4 kW home system would generate roughly 142 kWh in winter, or 310 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
931kWh/kW
A 1 kW system generates ~931 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: 54% • Flats: 7% • Bungalows: 39% Based on 492 properties

Coverage

Isle of Anglesey (100%)

Areas Covered

Lligwy, Cefni, Aethwy

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

LL76 (Isle of Anglesey)
≈2.4 km away
Local sunshine: ~933 kWh/kWp · +0% vs LL75
LL74 (Isle of Anglesey)
≈4.0 km away
Local sunshine: ~932 kWh/kWp · +0% vs LL75
LL78 (Isle of Anglesey)
≈4.9 km away
Local sunshine: ~947 kWh/kWp · +2% vs LL75
LL73 (Isle of Anglesey)
≈6.1 km away
Local sunshine: ~948 kWh/kWp · +2% vs LL75
LL77 (Isle of Anglesey)
≈6.8 km away
Local sunshine: ~966 kWh/kWp · +4% vs LL75
LL59 (Isle of Anglesey)
≈7.0 km away
Local sunshine: ~843 kWh/kWp · -9% vs LL75

Similar sunshine across the UK

WV12 (Walsall)
~931 kWh/kWp · -0% vs LL75
WV14 (Wolverhampton)
~931 kWh/kWp · +0% vs LL75
ST15 (Stafford)
~931 kWh/kWp · +0% vs LL75