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Solar panel cost in Isle of Anglesey (LL58)

See realistic solar installation costs, savings and payback for LL58 (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
15.8 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£646
What you save every year
Profit Over 25 Years
£5,971
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: Bigger systems don’t shorten payback—cost and savings rise together per kW.
  • 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

Costs: Battery prices are typically £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 24.43p/kWh with a 69.98p/day standing charge. Your postcode’s south-facing sunshine yield is 819 kWh/kW — 111 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 819 kWh per year on a south-facing roof. We value self-used electricity at 24.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
24.4p/kWh
Standing charge
70.0p/day
Sunshine yield (south)
819 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: £646, Upfront: £10,173, Break-even: 15.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1638 kWh 655 kWh 983 kWh £160 £98 £258 £4,069 15.8 yrs £1,097
3 kW 2457 kWh 983 kWh 1474 kWh £240 £147 £387 £6,104 15.8 yrs £1,646
4 kW 3275 kWh 1310 kWh 1965 kWh £320 £197 £517 £8,138 15.8 yrs £2,194
5 kW 4094 kWh 1638 kWh 2457 kWh £400 £246 £646 £10,173 15.8 yrs £2,743
6 kW 4913 kWh 1965 kWh 2948 kWh £480 £295 £775 £12,207 15.8 yrs £3,291
7 kW 5732 kWh 2293 kWh 3439 kWh £560 £344 £904 £14,242 15.8 yrs £3,840
8 kW 6551 kWh 2620 kWh 3931 kWh £640 £393 £1,033 £16,276 15.8 yrs £4,388

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £764, Upfront: £12,273, Break-even: 16.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1638 kWh 983 kWh 655 kWh £240 £66 £306 £6,169 20.2 yrs £-58
3 kW 2457 kWh 1474 kWh 983 kWh £360 £98 £458 £8,204 17.9 yrs £964
4 kW 3275 kWh 1965 kWh 1310 kWh £480 £131 £611 £10,238 16.8 yrs £1,985
5 kW 4094 kWh 2457 kWh 1638 kWh £600 £164 £764 £12,273 16.1 yrs £3,006
6 kW 4913 kWh 2948 kWh 1965 kWh £720 £197 £917 £14,307 15.6 yrs £4,027
7 kW 5732 kWh 3439 kWh 2293 kWh £840 £229 £1,069 £16,342 15.3 yrs £5,048
8 kW 6551 kWh 3931 kWh 2620 kWh £960 £262 £1,222 £18,376 15.0 yrs £6,069

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £823, Upfront: £13,673, Break-even: 16.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1638 kWh 1146 kWh 491 kWh £280 £49 £329 £7,569 23.0 yrs £-985
3 kW 2457 kWh 1720 kWh 737 kWh £420 £74 £494 £9,604 19.4 yrs £273
4 kW 3275 kWh 2293 kWh 983 kWh £560 £98 £658 £11,638 17.7 yrs £1,530
5 kW 4094 kWh 2866 kWh 1228 kWh £700 £123 £823 £13,673 16.6 yrs £2,788
6 kW 4913 kWh 3439 kWh 1474 kWh £840 £147 £988 £15,707 15.9 yrs £4,045
7 kW 5732 kWh 4012 kWh 1720 kWh £980 £172 £1,152 £17,742 15.4 yrs £5,303
8 kW 6551 kWh 4586 kWh 1965 kWh £1,120 £197 £1,317 £19,776 15.0 yrs £6,560

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £841, Upfront: £15,423, Break-even: 18.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1638 kWh 1196 kWh 442 kWh £292 £44 £336 £9,319 27.7 yrs £-2,593
3 kW 2457 kWh 1793 kWh 663 kWh £438 £66 £504 £11,354 22.5 yrs £-1,265
4 kW 3275 kWh 2391 kWh 884 kWh £584 £88 £673 £13,388 19.9 yrs £64
5 kW 4094 kWh 2989 kWh 1105 kWh £730 £111 £841 £15,423 18.3 yrs £1,392
6 kW 4913 kWh 3587 kWh 1327 kWh £876 £133 £1,009 £17,457 17.3 yrs £2,720
7 kW 5732 kWh 4184 kWh 1548 kWh £1,022 £155 £1,177 £19,492 16.6 yrs £4,049
8 kW 6551 kWh 4782 kWh 1769 kWh £1,168 £177 £1,345 £21,526 16.0 yrs £5,377

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £853, Upfront: £17,173, Break-even: 20.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1638 kWh 1228 kWh 409 kWh £300 £41 £341 £11,069 32.5 yrs £-4,249
3 kW 2457 kWh 1842 kWh 614 kWh £450 £61 £512 £13,104 25.6 yrs £-2,873
4 kW 3275 kWh 2457 kWh 819 kWh £600 £82 £682 £15,138 22.2 yrs £-1,497
5 kW 4094 kWh 3071 kWh 1024 kWh £750 £102 £853 £17,173 20.1 yrs £-122
6 kW 4913 kWh 3685 kWh 1228 kWh £900 £123 £1,023 £19,207 18.8 yrs £1,254
7 kW 5732 kWh 4299 kWh 1433 kWh £1,050 £143 £1,194 £21,242 17.8 yrs £2,630
8 kW 6551 kWh 4913 kWh 1638 kWh £1,200 £164 £1,364 £23,276 17.1 yrs £4,005

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £864, Upfront: £19,623, Break-even: 22.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1638 kWh 1261 kWh 377 kWh £308 £38 £346 £13,519 39.1 yrs £-6,604
3 kW 2457 kWh 1892 kWh 565 kWh £462 £57 £519 £15,554 30.0 yrs £-5,181
4 kW 3275 kWh 2522 kWh 753 kWh £616 £75 £691 £17,588 25.4 yrs £-3,758
5 kW 4094 kWh 3153 kWh 942 kWh £770 £94 £864 £19,623 22.7 yrs £-2,335
6 kW 4913 kWh 3783 kWh 1130 kWh £924 £113 £1,037 £21,657 20.9 yrs £-912
7 kW 5732 kWh 4414 kWh 1318 kWh £1,078 £132 £1,210 £23,692 19.6 yrs £511
8 kW 6551 kWh 5044 kWh 1507 kWh £1,232 £151 £1,383 £25,726 18.6 yrs £1,934

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, 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.

Insights for LL58

Figures below are tailored to LL58 — click through for full league tables.

Big-Roof Britain Rank #405 of 2182
5.7 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #2694 of 2997
14.1 years (UK avg 12.6 years)
~£722 /yr • £10,173 upfront
Standing-Charge Drag Rank #2700 of 2997
35.9% (UK avg 24.6%) drag on savings
£259 fixed • ~£722 /yr value
Aspect Penalty View ranking →
East −16.5% West −19.4%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL58

Monthly generation per kilowatt of solar panels

kWh 24 Jan 42 Feb 71 Mar 100 Apr 111 May 109 Jun 103 Jul 90 Aug 70 Sep 49 Oct 28 Nov 21 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 42.4% 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 29 kWh per month; the average month produces around 68 kWh. So a typical 4 kW home system would generate roughly 116 kWh in winter, or 273 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
24.43p/kWh
Daily Fixed Charge
69.98p/day
Local Sunshine
819kWh/kW
A 1 kW system generates ~819 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: 56% • Flats: 8% • Bungalows: 35% Based on 1,501 properties

Coverage

Isle of Anglesey (96%)|Gwynedd (4%)

Areas Covered

Seiriol, Canol Bangor

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q1 2026

Installation costs: MCS certified installer data, March 2025

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)
≈6.9 km away
Local sunshine: ~792 kWh/kWp · -3% vs LL58
LL59 (Isle of Anglesey)
≈7.0 km away
Local sunshine: ~843 kWh/kWp · +3% vs LL58
LL75 (Isle of Anglesey)
≈8.2 km away
Local sunshine: ~931 kWh/kWp · +14% vs LL58
LL33 (Conwy)
≈8.5 km away
Local sunshine: ~886 kWh/kWp · +8% vs LL58
LL76 (Isle of Anglesey)
≈9.8 km away
Local sunshine: ~933 kWh/kWp · +14% vs LL58
LL74 (Isle of Anglesey)
≈9.9 km away
Local sunshine: ~932 kWh/kWp · +14% vs LL58

Similar sunshine across the UK

G69 (North Lanarkshire)
~819 kWh/kWp · +0% vs LL58
ML5 (North Lanarkshire)
~819 kWh/kWp · +0% vs LL58
G68 (North Lanarkshire)
~818 kWh/kWp · -0% vs LL58