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Solar panel cost in Isle of Anglesey (LL74)

See realistic solar installation costs, savings and payback for LL74 (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
£954
What you save every year
Profit Over 25 Years
£14,078
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 932 kWh/kW — 2 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 932 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)
932 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: £795, 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 1863 kWh 745 kWh 1118 kWh £206 £112 £318 £3,256 10.2 yrs £3,103
3 kW 2795 kWh 1118 kWh 1677 kWh £309 £168 £477 £4,883 10.2 yrs £4,654
4 kW 3726 kWh 1490 kWh 2236 kWh £412 £224 £636 £6,511 10.2 yrs £6,206
5 kW 4658 kWh 1863 kWh 2795 kWh £515 £279 £795 £8,139 10.2 yrs £7,757
6 kW 5589 kWh 2236 kWh 3354 kWh £618 £335 £954 £9,767 10.2 yrs £9,309
7 kW 6521 kWh 2608 kWh 3913 kWh £721 £391 £1,113 £11,394 10.2 yrs £10,860
8 kW 7452 kWh 2981 kWh 4471 kWh £825 £447 £1,272 £13,022 10.2 yrs £12,412

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: £959, 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 1863 kWh 1118 kWh 745 kWh £309 £75 £384 £5,356 14.0 yrs £2,319
3 kW 2795 kWh 1677 kWh 1118 kWh £464 £112 £576 £6,983 12.1 yrs £4,529
4 kW 3726 kWh 2236 kWh 1490 kWh £618 £149 £767 £8,611 11.2 yrs £6,738
5 kW 4658 kWh 2795 kWh 1863 kWh £773 £186 £959 £10,239 10.7 yrs £8,948
6 kW 5589 kWh 3354 kWh 2236 kWh £928 £224 £1,151 £11,867 10.3 yrs £11,157
7 kW 6521 kWh 3913 kWh 2608 kWh £1,082 £261 £1,343 £13,494 10.0 yrs £13,367
8 kW 7452 kWh 4471 kWh 2981 kWh £1,237 £298 £1,535 £15,122 9.9 yrs £15,576

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: £1,042, 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 1863 kWh 1304 kWh 559 kWh £361 £56 £417 £6,756 16.2 yrs £1,577
3 kW 2795 kWh 1956 kWh 838 kWh £541 £84 £625 £8,383 13.4 yrs £4,116
4 kW 3726 kWh 2608 kWh 1118 kWh £721 £112 £833 £10,011 12.0 yrs £6,654
5 kW 4658 kWh 3260 kWh 1397 kWh £902 £140 £1,042 £11,639 11.2 yrs £9,193
6 kW 5589 kWh 3913 kWh 1677 kWh £1,082 £168 £1,250 £13,267 10.6 yrs £11,731
7 kW 6521 kWh 4565 kWh 1956 kWh £1,263 £196 £1,458 £14,894 10.2 yrs £14,270
8 kW 7452 kWh 5217 kWh 2236 kWh £1,443 £224 £1,667 £16,522 9.9 yrs £16,808

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: £1,066, 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 1863 kWh 1360 kWh 503 kWh £376 £50 £427 £8,506 19.9 yrs £25
3 kW 2795 kWh 2040 kWh 755 kWh £564 £75 £640 £10,133 15.8 yrs £2,662
4 kW 3726 kWh 2720 kWh 1006 kWh £752 £101 £853 £11,761 13.8 yrs £5,299
5 kW 4658 kWh 3400 kWh 1258 kWh £940 £126 £1,066 £13,389 12.6 yrs £7,936
6 kW 5589 kWh 4080 kWh 1509 kWh £1,129 £151 £1,280 £15,017 11.7 yrs £10,574
7 kW 6521 kWh 4760 kWh 1761 kWh £1,317 £176 £1,493 £16,644 11.2 yrs £13,211
8 kW 7452 kWh 5440 kWh 2012 kWh £1,505 £201 £1,706 £18,272 10.7 yrs £15,848

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: £1,083, 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 1863 kWh 1397 kWh 466 kWh £387 £47 £433 £10,256 23.7 yrs £-1,594
3 kW 2795 kWh 2096 kWh 699 kWh £580 £70 £650 £11,883 18.3 yrs £1,109
4 kW 3726 kWh 2795 kWh 932 kWh £773 £93 £866 £13,511 15.6 yrs £3,812
5 kW 4658 kWh 3493 kWh 1164 kWh £966 £116 £1,083 £15,139 14.0 yrs £6,515
6 kW 5589 kWh 4192 kWh 1397 kWh £1,160 £140 £1,299 £16,767 12.9 yrs £9,218
7 kW 6521 kWh 4891 kWh 1630 kWh £1,353 £163 £1,516 £18,394 12.1 yrs £11,921
8 kW 7452 kWh 5589 kWh 1863 kWh £1,546 £186 £1,732 £20,022 11.6 yrs £14,624

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: £1,099, 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 1863 kWh 1435 kWh 429 kWh £397 £43 £440 £12,706 28.9 yrs £-3,912
3 kW 2795 kWh 2152 kWh 643 kWh £595 £64 £659 £14,333 21.7 yrs £-1,143
4 kW 3726 kWh 2869 kWh 857 kWh £794 £86 £879 £15,961 18.2 yrs £1,625
5 kW 4658 kWh 3587 kWh 1071 kWh £992 £107 £1,099 £17,589 16.0 yrs £4,394
6 kW 5589 kWh 4304 kWh 1286 kWh £1,190 £129 £1,319 £19,217 14.6 yrs £7,163
7 kW 6521 kWh 5021 kWh 1500 kWh £1,389 £150 £1,539 £20,844 13.5 yrs £9,932
8 kW 7452 kWh 5738 kWh 1714 kWh £1,587 £171 £1,759 £22,472 12.8 yrs £12,701

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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Insights for LL74

Figures below are tailored to LL74 — click through for full league tables.

Big-Roof Britain Rank #26 of 2182
7.4 kWp (UK avg 5.1 kWp)
~16 panels (≈430 W)
Solar Payback Index Rank #1292 of 2996
10.2 years (UK avg 10.8 years)
~£954 /yr • £9,767 upfront
Standing-Charge Drag Rank #1740 of 2996
27.0% (UK avg 26.6%) drag on savings
£258 fixed • ~£954 /yr value
Aspect Penalty View ranking →
East −19.0% West −21.9%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL74

Monthly generation per kilowatt of solar panels

kWh 32 Jan 50 Feb 82 Mar 109 Apr 124 May 119 Jun 113 Jul 102 Aug 82 Sep 58 Oct 35 Nov 24 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 45.4% 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 141 kWh in winter, or 311 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
932kWh/kW
A 1 kW system generates ~932 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: 31% • Flats: 12% • Bungalows: 57% Based on 949 properties

Coverage

Isle of Anglesey (100%)

Areas Covered

Lligwy, Cefni

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)
≈2.1 km away
Local sunshine: ~933 kWh/kWp · +0% vs LL74
LL78 (Isle of Anglesey)
≈2.2 km away
Local sunshine: ~947 kWh/kWp · +2% vs LL74
LL73 (Isle of Anglesey)
≈2.2 km away
Local sunshine: ~948 kWh/kWp · +2% vs LL74
LL72 (Isle of Anglesey)
≈3.9 km away
Local sunshine: ~934 kWh/kWp · +0% vs LL74
LL75 (Isle of Anglesey)
≈4.0 km away
Local sunshine: ~931 kWh/kWp · -0% vs LL74
LL70 (Isle of Anglesey)
≈6.2 km away
Local sunshine: ~945 kWh/kWp · +1% vs LL74

Similar sunshine across the UK

S74 (Barnsley)
~932 kWh/kWp · -0% vs LL74
DG7 (Dumfries and Galloway)
~931 kWh/kWp · -0% vs LL74
WF1 (Wakefield)
~932 kWh/kWp · +0% vs LL74