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Solar panel cost in Conwy (LL27)

See realistic solar installation costs, savings and payback for LL27 (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
12.3 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£795
What you save every year
Profit Over 25 Years
£10,121
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 777 kWh/kW — 153 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 777 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)
777 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: £663, Upfront: £8,139, Break-even: 12.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1554 kWh 622 kWh 932 kWh £172 £93 £265 £3,256 12.3 yrs £2,048
3 kW 2331 kWh 932 kWh 1399 kWh £258 £140 £398 £4,883 12.3 yrs £3,072
4 kW 3108 kWh 1243 kWh 1865 kWh £344 £186 £530 £6,511 12.3 yrs £4,095
5 kW 3885 kWh 1554 kWh 2331 kWh £430 £233 £663 £8,139 12.3 yrs £5,119
6 kW 4662 kWh 1865 kWh 2797 kWh £516 £280 £795 £9,767 12.3 yrs £6,143
7 kW 5439 kWh 2175 kWh 3263 kWh £602 £326 £928 £11,394 12.3 yrs £7,167
8 kW 6216 kWh 2486 kWh 3729 kWh £688 £373 £1,061 £13,022 12.3 yrs £8,191

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: £800, Upfront: £10,239, Break-even: 12.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1554 kWh 932 kWh 622 kWh £258 £62 £320 £5,356 16.7 yrs £1,045
3 kW 2331 kWh 1399 kWh 932 kWh £387 £93 £480 £6,983 14.5 yrs £2,618
4 kW 3108 kWh 1865 kWh 1243 kWh £516 £124 £640 £8,611 13.5 yrs £4,191
5 kW 3885 kWh 2331 kWh 1554 kWh £645 £155 £800 £10,239 12.8 yrs £5,763
6 kW 4662 kWh 2797 kWh 1865 kWh £774 £186 £960 £11,867 12.4 yrs £7,336
7 kW 5439 kWh 3263 kWh 2175 kWh £903 £218 £1,120 £13,494 12.0 yrs £8,909
8 kW 6216 kWh 3729 kWh 2486 kWh £1,032 £249 £1,280 £15,122 11.8 yrs £10,482

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: £869, Upfront: £11,639, 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 1554 kWh 1088 kWh 466 kWh £301 £47 £347 £6,756 19.4 yrs £194
3 kW 2331 kWh 1632 kWh 699 kWh £451 £70 £521 £8,383 16.1 yrs £2,041
4 kW 3108 kWh 2175 kWh 932 kWh £602 £93 £695 £10,011 14.4 yrs £3,888
5 kW 3885 kWh 2719 kWh 1165 kWh £752 £117 £869 £11,639 13.4 yrs £5,736
6 kW 4662 kWh 3263 kWh 1399 kWh £903 £140 £1,042 £13,267 12.7 yrs £7,583
7 kW 5439 kWh 3807 kWh 1632 kWh £1,053 £163 £1,216 £14,894 12.2 yrs £9,430
8 kW 6216 kWh 4351 kWh 1865 kWh £1,203 £186 £1,390 £16,522 11.9 yrs £11,277

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: £889, Upfront: £13,389, Break-even: 15.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1554 kWh 1134 kWh 420 kWh £314 £42 £356 £8,506 23.9 yrs £-1,391
3 kW 2331 kWh 1702 kWh 629 kWh £471 £63 £534 £10,133 19.0 yrs £538
4 kW 3108 kWh 2269 kWh 839 kWh £628 £84 £711 £11,761 16.5 yrs £2,468
5 kW 3885 kWh 2836 kWh 1049 kWh £784 £105 £889 £13,389 15.1 yrs £4,397
6 kW 4662 kWh 3403 kWh 1259 kWh £941 £126 £1,067 £15,017 14.1 yrs £6,327
7 kW 5439 kWh 3970 kWh 1468 kWh £1,098 £147 £1,245 £16,644 13.4 yrs £8,256
8 kW 6216 kWh 4537 kWh 1678 kWh £1,255 £168 £1,423 £18,272 12.8 yrs £10,186

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: £903, Upfront: £15,139, Break-even: 16.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1554 kWh 1165 kWh 388 kWh £322 £39 £361 £10,256 28.4 yrs £-3,031
3 kW 2331 kWh 1748 kWh 583 kWh £484 £58 £542 £11,883 21.9 yrs £-1,047
4 kW 3108 kWh 2331 kWh 777 kWh £645 £78 £722 £13,511 18.7 yrs £937
5 kW 3885 kWh 2914 kWh 971 kWh £806 £97 £903 £15,139 16.8 yrs £2,922
6 kW 4662 kWh 3496 kWh 1165 kWh £967 £117 £1,084 £16,767 15.5 yrs £4,906
7 kW 5439 kWh 4079 kWh 1360 kWh £1,128 £136 £1,264 £18,394 14.5 yrs £6,890
8 kW 6216 kWh 4662 kWh 1554 kWh £1,289 £155 £1,445 £20,022 13.9 yrs £8,875

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: £917, Upfront: £17,589, Break-even: 19.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1554 kWh 1197 kWh 357 kWh £331 £36 £367 £12,706 34.6 yrs £-5,372
3 kW 2331 kWh 1795 kWh 536 kWh £496 £54 £550 £14,333 26.1 yrs £-3,332
4 kW 3108 kWh 2393 kWh 715 kWh £662 £71 £733 £15,961 21.8 yrs £-1,293
5 kW 3885 kWh 2991 kWh 894 kWh £827 £89 £917 £17,589 19.2 yrs £746
6 kW 4662 kWh 3590 kWh 1072 kWh £993 £107 £1,100 £19,217 17.5 yrs £2,785
7 kW 5439 kWh 4188 kWh 1251 kWh £1,158 £125 £1,283 £20,844 16.2 yrs £4,824
8 kW 6216 kWh 4786 kWh 1430 kWh £1,324 £143 £1,467 £22,472 15.3 yrs £6,864

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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Want a quote sanity check for LL27?

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 LL27

Figures below are tailored to LL27 — click through for full league tables.

Big-Roof Britain Rank #637 of 2182
5.4 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #2651 of 2996
12.3 years (UK avg 10.8 years)
~£796 /yr • £9,767 upfront
Standing-Charge Drag Rank #2480 of 2996
32.4% (UK avg 26.6%) drag on savings
£258 fixed • ~£796 /yr value
Aspect Penalty View ranking →
East −15.1% West −11.8%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL27

Monthly generation per kilowatt of solar panels

kWh 8 Jan 22 Feb 72 Mar 106 Apr 117 May 114 Jun 110 Jul 97 Aug 77 Sep 37 Oct 10 Nov 6 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 18.7% 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 12 kWh per month; the average month produces around 65 kWh. So a typical 4 kW home system would generate roughly 48 kWh in winter, or 259 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
777kWh/kW
A 1 kW system generates ~777 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: 73% • Flats: 14% • Bungalows: 13% Based on 226 properties

Coverage

Conwy (100%)

Areas Covered

Betws-y-Coed and Trefriw, Llanrwst a Llanddoged

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

LL26 (Conwy)
≈2.5 km away
Local sunshine: ~870 kWh/kWp · +12% vs LL27
LL24 (Conwy)
≈11.4 km away
Local sunshine: ~811 kWh/kWp · +4% vs LL27
LL25 (Conwy)
≈11.6 km away
Local sunshine: ~823 kWh/kWp · +6% vs LL27
LL32 (Conwy)
≈13.9 km away
Local sunshine: ~906 kWh/kWp · +17% vs LL27
LL34 (Conwy)
≈14.5 km away
Local sunshine: ~871 kWh/kWp · +12% vs LL27
LL33 (Conwy)
≈15.0 km away
Local sunshine: ~886 kWh/kWp · +14% vs LL27

Similar sunshine across the UK

PA64 (Argyll and Bute)
~778 kWh/kWp · +0% vs LL27
PH26 (Highland)
~778 kWh/kWp · +0% vs LL27
PA37 (Argyll and Bute)
~779 kWh/kWp · +0% vs LL27