Independent solar numbers for your postcode using official UK data
Home Regions Guides Compare quotes Solar assistant
Insights
Big Roof Britain Solar Payback Index Standing Charge Drag Roof Direction Penalty Winter Solar Reality Seasonal Solar Output

Solar panel cost in Conwy (LL25)

See realistic solar installation costs, savings and payback for LL25 (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
11.6 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£703
What you save every year
Profit Over 25 Years
£9,425
After paying itself off, you're this much ahead

Ready to Get Started?

Get your free quote from Blue Ape Renewables. They'll connect you with MCS-certified installers in your area and handle all the paperwork.

Get Solar Quote →
4.8★ Trustpilot • Octopus Energy trusted partner • MCS certified • No obligation
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 823 kWh/kW — 107 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 823 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)
823 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: £703, Upfront: £8,139, Break-even: 11.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1647 kWh 659 kWh 988 kWh £182 £99 £281 £3,256 11.6 yrs £2,365
3 kW 2470 kWh 988 kWh 1482 kWh £273 £148 £422 £4,883 11.6 yrs £3,547
4 kW 3294 kWh 1317 kWh 1976 kWh £364 £198 £562 £6,511 11.6 yrs £4,730
5 kW 4117 kWh 1647 kWh 2470 kWh £456 £247 £703 £8,139 11.6 yrs £5,912
6 kW 4941 kWh 1976 kWh 2964 kWh £547 £296 £843 £9,767 11.6 yrs £7,095
7 kW 5764 kWh 2306 kWh 3458 kWh £638 £346 £984 £11,394 11.6 yrs £8,277
8 kW 6587 kWh 2635 kWh 3952 kWh £729 £395 £1,124 £13,022 11.6 yrs £9,460

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: £848, Upfront: £10,239, Break-even: 12.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1647 kWh 988 kWh 659 kWh £273 £66 £339 £5,356 15.8 yrs £1,428
3 kW 2470 kWh 1482 kWh 988 kWh £410 £99 £509 £6,983 13.7 yrs £3,192
4 kW 3294 kWh 1976 kWh 1317 kWh £547 £132 £678 £8,611 12.7 yrs £4,956
5 kW 4117 kWh 2470 kWh 1647 kWh £683 £165 £848 £10,239 12.1 yrs £6,721
6 kW 4941 kWh 2964 kWh 1976 kWh £820 £198 £1,018 £11,867 11.7 yrs £8,485
7 kW 5764 kWh 3458 kWh 2306 kWh £957 £231 £1,187 £13,494 11.4 yrs £10,249
8 kW 6587 kWh 3952 kWh 2635 kWh £1,093 £263 £1,357 £15,122 11.1 yrs £12,013

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: £921, Upfront: £11,639, 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 1647 kWh 1153 kWh 494 kWh £319 £49 £368 £6,756 18.3 yrs £610
3 kW 2470 kWh 1729 kWh 741 kWh £478 £74 £552 £8,383 15.2 yrs £2,665
4 kW 3294 kWh 2306 kWh 988 kWh £638 £99 £737 £10,011 13.6 yrs £4,720
5 kW 4117 kWh 2882 kWh 1235 kWh £797 £124 £921 £11,639 12.6 yrs £6,775
6 kW 4941 kWh 3458 kWh 1482 kWh £957 £148 £1,105 £13,267 12.0 yrs £8,830
7 kW 5764 kWh 4035 kWh 1729 kWh £1,116 £173 £1,289 £14,894 11.6 yrs £10,885
8 kW 6587 kWh 4611 kWh 1976 kWh £1,275 £198 £1,473 £16,522 11.2 yrs £12,940

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: £942, Upfront: £13,389, 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 1647 kWh 1202 kWh 445 kWh £333 £44 £377 £8,506 22.6 yrs £-966
3 kW 2470 kWh 1803 kWh 667 kWh £499 £67 £565 £10,133 17.9 yrs £1,177
4 kW 3294 kWh 2404 kWh 889 kWh £665 £89 £754 £11,761 15.6 yrs £3,319
5 kW 4117 kWh 3006 kWh 1112 kWh £831 £111 £942 £13,389 14.2 yrs £5,461
6 kW 4941 kWh 3607 kWh 1334 kWh £998 £133 £1,131 £15,017 13.3 yrs £7,603
7 kW 5764 kWh 4208 kWh 1556 kWh £1,164 £156 £1,319 £16,644 12.6 yrs £9,745
8 kW 6587 kWh 4809 kWh 1779 kWh £1,330 £178 £1,508 £18,272 12.1 yrs £11,888

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: £957, Upfront: £15,139, 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 1647 kWh 1235 kWh 412 kWh £342 £41 £383 £10,256 26.8 yrs £-2,599
3 kW 2470 kWh 1853 kWh 618 kWh £512 £62 £574 £11,883 20.7 yrs £-399
4 kW 3294 kWh 2470 kWh 823 kWh £683 £82 £766 £13,511 17.6 yrs £1,801
5 kW 4117 kWh 3088 kWh 1029 kWh £854 £103 £957 £15,139 15.8 yrs £4,002
6 kW 4941 kWh 3705 kWh 1235 kWh £1,025 £124 £1,148 £16,767 14.6 yrs £6,202
7 kW 5764 kWh 4323 kWh 1441 kWh £1,196 £144 £1,340 £18,394 13.7 yrs £8,403
8 kW 6587 kWh 4941 kWh 1647 kWh £1,367 £165 £1,531 £20,022 13.1 yrs £10,603

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: £972, Upfront: £17,589, Break-even: 18.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1647 kWh 1268 kWh 379 kWh £351 £38 £389 £12,706 32.7 yrs £-4,933
3 kW 2470 kWh 1902 kWh 568 kWh £526 £57 £583 £14,333 24.6 yrs £-2,674
4 kW 3294 kWh 2536 kWh 758 kWh £702 £76 £777 £15,961 20.5 yrs £-416
5 kW 4117 kWh 3170 kWh 947 kWh £877 £95 £972 £17,589 18.1 yrs £1,843
6 kW 4941 kWh 3804 kWh 1136 kWh £1,052 £114 £1,166 £19,217 16.5 yrs £4,101
7 kW 5764 kWh 4438 kWh 1326 kWh £1,228 £133 £1,360 £20,844 15.3 yrs £6,360
8 kW 6587 kWh 5072 kWh 1515 kWh £1,403 £152 £1,555 £22,472 14.5 yrs £8,618

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.

Compare solar quotes before you sign

Check what MCS certification means

Understand DNO, G98 and G99 export limits

New quote check

Want a quote sanity check for LL25?

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.

Request a quote sanity check →

Insights for LL25

Figures below are tailored to LL25 — click through for full league tables.

Big-Roof Britain Rank #981 of 2182
5.1 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #2344 of 2996
11.6 years (UK avg 10.8 years)
~£702 /yr • £8,139 upfront
Standing-Charge Drag Rank #2695 of 2996
36.8% (UK avg 26.6%) drag on savings
£258 fixed • ~£702 /yr value
Aspect Penalty View ranking →
East −18.0% West −19.5%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL25

Monthly generation per kilowatt of solar panels

kWh 23 Jan 38 Feb 73 Mar 102 Apr 111 May 107 Jun 105 Jul 91 Aug 76 Sep 50 Oct 30 Nov 18 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 38.2% 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 26 kWh per month; the average month produces around 69 kWh. So a typical 4 kW home system would generate roughly 105 kWh in winter, or 274 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
823kWh/kW
A 1 kW system generates ~823 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: 95% • Flats: 0% • Bungalows: 5% Based on 165 properties

Coverage

Conwy (100%)

Areas Covered

Betws-y-Coed and Trefriw, Uwch Conwy

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

LL24 (Conwy)
≈5.7 km away
Local sunshine: ~811 kWh/kWp · -2% vs LL25
LL41 (Gwynedd)
≈7.9 km away
Local sunshine: ~808 kWh/kWp · -2% vs LL25
LL26 (Conwy)
≈11.4 km away
Local sunshine: ~870 kWh/kWp · +6% vs LL25
LL27 (Conwy)
≈11.6 km away
Local sunshine: ~777 kWh/kWp · -6% vs LL25
LL48 (Gwynedd)
≈18.2 km away
Local sunshine: ~812 kWh/kWp · -1% vs LL25
LL47 (Gwynedd)
≈20.7 km away
Local sunshine: ~795 kWh/kWp · -3% vs LL25

Similar sunshine across the UK

PH6 (Perth and Kinross)
~824 kWh/kWp · +0% vs LL25
PH9 (Perth and Kinross)
~824 kWh/kWp · +0% vs LL25
KW8 (Highland)
~823 kWh/kWp · -0% vs LL25