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Solar panel cost in Conwy (LL30)

See realistic solar installation costs, savings and payback for LL30 (Conwy) 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
10.4 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£941
What you save every year
Profit Over 25 Years
£13,767
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 919 kWh/kW — 11 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 919 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)
919 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: £784, Upfront: £8,139, Break-even: 10.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1839 kWh 736 kWh 1103 kWh £203 £110 £314 £3,256 10.4 yrs £3,020
3 kW 2758 kWh 1103 kWh 1655 kWh £305 £165 £471 £4,883 10.4 yrs £4,530
4 kW 3678 kWh 1471 kWh 2207 kWh £407 £221 £628 £6,511 10.4 yrs £6,040
5 kW 4597 kWh 1839 kWh 2758 kWh £509 £276 £784 £8,139 10.4 yrs £7,550
6 kW 5517 kWh 2207 kWh 3310 kWh £610 £331 £941 £9,767 10.4 yrs £9,060
7 kW 6436 kWh 2574 kWh 3862 kWh £712 £386 £1,098 £11,394 10.4 yrs £10,570
8 kW 7355 kWh 2942 kWh 4413 kWh £814 £441 £1,255 £13,022 10.4 yrs £12,080

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: £947, Upfront: £10,239, 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 1839 kWh 1103 kWh 736 kWh £305 £74 £379 £5,356 14.1 yrs £2,219
3 kW 2758 kWh 1655 kWh 1103 kWh £458 £110 £568 £6,983 12.3 yrs £4,379
4 kW 3678 kWh 2207 kWh 1471 kWh £610 £147 £757 £8,611 11.4 yrs £6,538
5 kW 4597 kWh 2758 kWh 1839 kWh £763 £184 £947 £10,239 10.8 yrs £8,698
6 kW 5517 kWh 3310 kWh 2207 kWh £916 £221 £1,136 £11,867 10.4 yrs £10,857
7 kW 6436 kWh 3862 kWh 2574 kWh £1,068 £257 £1,326 £13,494 10.2 yrs £13,017
8 kW 7355 kWh 4413 kWh 2942 kWh £1,221 £294 £1,515 £15,122 10.0 yrs £15,176

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: £1,028, Upfront: £11,639, Break-even: 11.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1839 kWh 1287 kWh 552 kWh £356 £55 £411 £6,756 16.4 yrs £1,469
3 kW 2758 kWh 1931 kWh 827 kWh £534 £83 £617 £8,383 13.6 yrs £3,953
4 kW 3678 kWh 2574 kWh 1103 kWh £712 £110 £822 £10,011 12.2 yrs £6,437
5 kW 4597 kWh 3218 kWh 1379 kWh £890 £138 £1,028 £11,639 11.3 yrs £8,921
6 kW 5517 kWh 3862 kWh 1655 kWh £1,068 £165 £1,234 £13,267 10.8 yrs £11,406
7 kW 6436 kWh 4505 kWh 1931 kWh £1,246 £193 £1,439 £14,894 10.3 yrs £13,890
8 kW 7355 kWh 5149 kWh 2207 kWh £1,424 £221 £1,645 £16,522 10.0 yrs £16,374

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: £1,052, Upfront: £13,389, Break-even: 12.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1839 kWh 1342 kWh 496 kWh £371 £50 £421 £8,506 20.2 yrs £-87
3 kW 2758 kWh 2014 kWh 745 kWh £557 £74 £631 £10,133 16.0 yrs £2,495
4 kW 3678 kWh 2685 kWh 993 kWh £743 £99 £842 £11,761 14.0 yrs £5,077
5 kW 4597 kWh 3356 kWh 1241 kWh £928 £124 £1,052 £13,389 12.7 yrs £7,658
6 kW 5517 kWh 4027 kWh 1489 kWh £1,114 £149 £1,263 £15,017 11.9 yrs £10,240
7 kW 6436 kWh 4698 kWh 1738 kWh £1,300 £174 £1,473 £16,644 11.3 yrs £12,822
8 kW 7355 kWh 5369 kWh 1986 kWh £1,485 £199 £1,684 £18,272 10.9 yrs £15,403

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: £1,069, Upfront: £15,139, Break-even: 14.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1839 kWh 1379 kWh 460 kWh £381 £46 £427 £10,256 24.0 yrs £-1,707
3 kW 2758 kWh 2069 kWh 690 kWh £572 £69 £641 £11,883 18.5 yrs £940
4 kW 3678 kWh 2758 kWh 919 kWh £763 £92 £855 £13,511 15.8 yrs £3,586
5 kW 4597 kWh 3448 kWh 1149 kWh £954 £115 £1,069 £15,139 14.2 yrs £6,233
6 kW 5517 kWh 4137 kWh 1379 kWh £1,144 £138 £1,282 £16,767 13.1 yrs £8,880
7 kW 6436 kWh 4827 kWh 1609 kWh £1,335 £161 £1,496 £18,394 12.3 yrs £11,526
8 kW 7355 kWh 5517 kWh 1839 kWh £1,526 £184 £1,710 £20,022 11.7 yrs £14,173

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: £1,085, Upfront: £17,589, Break-even: 16.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1839 kWh 1416 kWh 423 kWh £392 £42 £434 £12,706 29.3 yrs £-4,027
3 kW 2758 kWh 2124 kWh 634 kWh £587 £63 £651 £14,333 22.0 yrs £-1,315
4 kW 3678 kWh 2832 kWh 846 kWh £783 £85 £868 £15,961 18.4 yrs £1,396
5 kW 4597 kWh 3540 kWh 1057 kWh £979 £106 £1,085 £17,589 16.2 yrs £4,108
6 kW 5517 kWh 4248 kWh 1269 kWh £1,175 £127 £1,302 £19,217 14.8 yrs £6,819
7 kW 6436 kWh 4956 kWh 1480 kWh £1,371 £148 £1,519 £20,844 13.7 yrs £9,531
8 kW 7355 kWh 5664 kWh 1692 kWh £1,567 £169 £1,736 £22,472 12.9 yrs £12,243

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 Conwy

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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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 LL30

Figures below are tailored to LL30 — click through for full league tables.

Big-Roof Britain Rank #1392 of 2182
4.8 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #1478 of 2996
10.4 years (UK avg 10.8 years)
~£941 /yr • £9,767 upfront
Standing-Charge Drag Rank #1794 of 2996
27.4% (UK avg 26.6%) drag on savings
£258 fixed • ~£941 /yr value
Aspect Penalty View ranking →
East −18.9% West −21.9%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL30

Monthly generation per kilowatt of solar panels

kWh 31 Jan 48 Feb 81 Mar 109 Apr 121 May 118 Jun 112 Jul 102 Aug 81 Sep 56 Oct 34 Nov 25 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 45.6% 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 77 kWh. So a typical 4 kW home system would generate roughly 140 kWh in winter, or 306 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
919kWh/kW
A 1 kW system generates ~919 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: 44% • Flats: 43% • Bungalows: 11% Based on 6,795 properties

Coverage

Conwy (100%)

Areas Covered

Tudno, Gogarth Mostyn, Penrhyn, Craig-y-don, Deganwy, Conwy, Glyn y Marl

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

LL31 (Conwy)
≈3.2 km away
Local sunshine: ~908 kWh/kWp · -1% vs LL30
LL32 (Conwy)
≈4.7 km away
Local sunshine: ~906 kWh/kWp · -1% vs LL30
LL28 (Conwy)
≈5.3 km away
Local sunshine: ~900 kWh/kWp · -2% vs LL30
LL29 (Conwy)
≈7.3 km away
Local sunshine: ~923 kWh/kWp · +0% vs LL30
LL34 (Conwy)
≈8.2 km away
Local sunshine: ~871 kWh/kWp · -5% vs LL30
LL33 (Conwy)
≈12.3 km away
Local sunshine: ~886 kWh/kWp · -4% vs LL30

Similar sunshine across the UK

ST10 (Staffordshire Moorlands)
~919 kWh/kWp · +0% vs LL30
S8 (Sheffield)
~919 kWh/kWp · -0% vs LL30
S7 (Sheffield)
~920 kWh/kWp · +0% vs LL30