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Solar panel cost in Gwynedd (LL44)

See realistic solar installation costs, savings and payback for LL44 (Gwynedd) 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
10.9 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£896
What you save every year
Profit Over 25 Years
£12,631
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 875 kWh/kW — 55 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 875 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)
875 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: £747, Upfront: £8,139, Break-even: 10.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1750 kWh 700 kWh 1050 kWh £194 £105 £299 £3,256 10.9 yrs £2,717
3 kW 2625 kWh 1050 kWh 1575 kWh £290 £158 £448 £4,883 10.9 yrs £4,076
4 kW 3500 kWh 1400 kWh 2100 kWh £387 £210 £597 £6,511 10.9 yrs £5,434
5 kW 4375 kWh 1750 kWh 2625 kWh £484 £263 £747 £8,139 10.9 yrs £6,793
6 kW 5250 kWh 2100 kWh 3150 kWh £581 £315 £896 £9,767 10.9 yrs £8,151
7 kW 6125 kWh 2450 kWh 3675 kWh £678 £368 £1,045 £11,394 10.9 yrs £9,510
8 kW 7000 kWh 2800 kWh 4200 kWh £775 £420 £1,195 £13,022 10.9 yrs £10,869

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: £901, Upfront: £10,239, Break-even: 11.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1750 kWh 1050 kWh 700 kWh £290 £70 £360 £5,356 14.9 yrs £1,853
3 kW 2625 kWh 1575 kWh 1050 kWh £436 £105 £541 £6,983 12.9 yrs £3,830
4 kW 3500 kWh 2100 kWh 1400 kWh £581 £140 £721 £8,611 11.9 yrs £5,807
5 kW 4375 kWh 2625 kWh 1750 kWh £726 £175 £901 £10,239 11.4 yrs £7,784
6 kW 5250 kWh 3150 kWh 2100 kWh £871 £210 £1,081 £11,867 11.0 yrs £9,760
7 kW 6125 kWh 3675 kWh 2450 kWh £1,017 £245 £1,262 £13,494 10.7 yrs £11,737
8 kW 7000 kWh 4200 kWh 2800 kWh £1,162 £280 £1,442 £15,122 10.5 yrs £13,714

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: £978, Upfront: £11,639, Break-even: 11.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1750 kWh 1225 kWh 525 kWh £339 £53 £391 £6,756 17.3 yrs £1,072
3 kW 2625 kWh 1838 kWh 788 kWh £508 £79 £587 £8,383 14.3 yrs £3,357
4 kW 3500 kWh 2450 kWh 1050 kWh £678 £105 £783 £10,011 12.8 yrs £5,643
5 kW 4375 kWh 3063 kWh 1313 kWh £847 £131 £978 £11,639 11.9 yrs £7,929
6 kW 5250 kWh 3675 kWh 1575 kWh £1,017 £158 £1,174 £13,267 11.3 yrs £10,215
7 kW 6125 kWh 4288 kWh 1838 kWh £1,186 £184 £1,370 £14,894 10.9 yrs £12,500
8 kW 7000 kWh 4900 kWh 2100 kWh £1,355 £210 £1,565 £16,522 10.6 yrs £14,786

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: £1,002, Upfront: £13,389, Break-even: 13.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1750 kWh 1278 kWh 473 kWh £353 £47 £401 £8,506 21.2 yrs £-493
3 kW 2625 kWh 1916 kWh 709 kWh £530 £71 £601 £10,133 16.9 yrs £1,885
4 kW 3500 kWh 2555 kWh 945 kWh £707 £95 £801 £11,761 14.7 yrs £4,264
5 kW 4375 kWh 3194 kWh 1181 kWh £883 £118 £1,002 £13,389 13.4 yrs £6,642
6 kW 5250 kWh 3833 kWh 1418 kWh £1,060 £142 £1,202 £15,017 12.5 yrs £9,021
7 kW 6125 kWh 4471 kWh 1654 kWh £1,237 £165 £1,402 £16,644 11.9 yrs £11,399
8 kW 7000 kWh 5110 kWh 1890 kWh £1,413 £189 £1,602 £18,272 11.4 yrs £13,778

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: £1,017, Upfront: £15,139, Break-even: 14.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1750 kWh 1313 kWh 438 kWh £363 £44 £407 £10,256 25.2 yrs £-2,119
3 kW 2625 kWh 1969 kWh 656 kWh £545 £66 £610 £11,883 19.5 yrs £321
4 kW 3500 kWh 2625 kWh 875 kWh £726 £88 £814 £13,511 16.6 yrs £2,761
5 kW 4375 kWh 3281 kWh 1094 kWh £908 £109 £1,017 £15,139 14.9 yrs £5,202
6 kW 5250 kWh 3938 kWh 1313 kWh £1,089 £131 £1,220 £16,767 13.7 yrs £7,642
7 kW 6125 kWh 4594 kWh 1531 kWh £1,271 £153 £1,424 £18,394 12.9 yrs £10,082
8 kW 7000 kWh 5250 kWh 1750 kWh £1,452 £175 £1,627 £20,022 12.3 yrs £12,522

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: £1,032, Upfront: £17,589, Break-even: 17.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1750 kWh 1348 kWh 403 kWh £373 £40 £413 £12,706 30.8 yrs £-4,446
3 kW 2625 kWh 2021 kWh 604 kWh £559 £60 £619 £14,333 23.1 yrs £-1,944
4 kW 3500 kWh 2695 kWh 805 kWh £745 £81 £826 £15,961 19.3 yrs £558
5 kW 4375 kWh 3369 kWh 1006 kWh £932 £101 £1,032 £17,589 17.0 yrs £3,061
6 kW 5250 kWh 4043 kWh 1208 kWh £1,118 £121 £1,239 £19,217 15.5 yrs £5,563
7 kW 6125 kWh 4716 kWh 1409 kWh £1,305 £141 £1,445 £20,844 14.4 yrs £8,065
8 kW 7000 kWh 5390 kWh 1610 kWh £1,491 £161 £1,652 £22,472 13.6 yrs £10,567

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 Gwynedd

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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Check what MCS certification means

Understand DNO, G98 and G99 export limits

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Share the first part of your postcode and a few basics. We’ll help you check whether system size, battery, export and paperwork assumptions look sensible before you commit to installer conversations.

This is a practical sanity-check request, not an instant quote promise. The Blue Ape quote route above remains available if you already want installer introductions.

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Insights for LL44

Figures below are tailored to LL44 — click through for full league tables.

Big-Roof Britain Rank #190 of 2182
6.2 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #1894 of 2996
10.9 years (UK avg 10.8 years)
~£896 /yr • £9,767 upfront
Standing-Charge Drag Rank #2038 of 2996
28.8% (UK avg 26.6%) drag on savings
£258 fixed • ~£896 /yr value
Aspect Penalty View ranking →
East −18.3% West −20.7%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL44

Monthly generation per kilowatt of solar panels

kWh 28 Jan 44 Feb 78 Mar 107 Apr 117 May 113 Jun 108 Jul 95 Aug 77 Sep 52 Oct 33 Nov 22 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 43.3% 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 73 kWh. So a typical 4 kW home system would generate roughly 126 kWh in winter, or 292 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
875kWh/kW
A 1 kW system generates ~875 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: 58% • Flats: 5% • Bungalows: 37% Based on 324 properties

Coverage

Gwynedd (100%)

Areas Covered

Dyffryn Ardudwy, Abermaw

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

LL43 (Gwynedd)
≈1.6 km away
Local sunshine: ~875 kWh/kWp · -0% vs LL44
LL45 (Gwynedd)
≈3.4 km away
Local sunshine: ~835 kWh/kWp · -5% vs LL44
LL46 (Gwynedd)
≈7.7 km away
Local sunshine: ~830 kWh/kWp · -5% vs LL44
LL42 (Gwynedd)
≈7.7 km away
Local sunshine: ~864 kWh/kWp · -1% vs LL44
LL39 (Gwynedd)
≈10.5 km away
Local sunshine: ~825 kWh/kWp · -6% vs LL44
LL38 (Gwynedd)
≈10.8 km away
Local sunshine: ~846 kWh/kWp · -3% vs LL44

Similar sunshine across the UK

HX7 (Calderdale)
~875 kWh/kWp · +0% vs LL44
M50 (Salford)
~875 kWh/kWp · -0% vs LL44
M30 (Salford)
~875 kWh/kWp · -0% vs LL44