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Solar panel cost in Conwy (LL28)

See realistic solar installation costs, savings and payback for LL28 (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
10.6 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£922
What you save every year
Profit Over 25 Years
£13,282
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 900 kWh/kW — 29 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 900 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)
900 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: £768, Upfront: £8,139, Break-even: 10.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1801 kWh 720 kWh 1081 kWh £199 £108 £307 £3,256 10.6 yrs £2,891
3 kW 2701 kWh 1081 kWh 1621 kWh £299 £162 £461 £4,883 10.6 yrs £4,336
4 kW 3602 kWh 1441 kWh 2161 kWh £399 £216 £615 £6,511 10.6 yrs £5,781
5 kW 4502 kWh 1801 kWh 2701 kWh £498 £270 £768 £8,139 10.6 yrs £7,227
6 kW 5403 kWh 2161 kWh 3242 kWh £598 £324 £922 £9,767 10.6 yrs £8,672
7 kW 6303 kWh 2521 kWh 3782 kWh £697 £378 £1,076 £11,394 10.6 yrs £10,118
8 kW 7204 kWh 2882 kWh 4322 kWh £797 £432 £1,229 £13,022 10.6 yrs £11,563

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: £927, Upfront: £10,239, Break-even: 11.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1801 kWh 1081 kWh 720 kWh £299 £72 £371 £5,356 14.4 yrs £2,063
3 kW 2701 kWh 1621 kWh 1081 kWh £448 £108 £556 £6,983 12.6 yrs £4,144
4 kW 3602 kWh 2161 kWh 1441 kWh £598 £144 £742 £8,611 11.6 yrs £6,226
5 kW 4502 kWh 2701 kWh 1801 kWh £747 £180 £927 £10,239 11.0 yrs £8,307
6 kW 5403 kWh 3242 kWh 2161 kWh £897 £216 £1,113 £11,867 10.7 yrs £10,389
7 kW 6303 kWh 3782 kWh 2521 kWh £1,046 £252 £1,298 £13,494 10.4 yrs £12,470
8 kW 7204 kWh 4322 kWh 2882 kWh £1,196 £288 £1,484 £15,122 10.2 yrs £14,552

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: £1,007, Upfront: £11,639, 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 1801 kWh 1261 kWh 540 kWh £349 £54 £403 £6,756 16.8 yrs £1,299
3 kW 2701 kWh 1891 kWh 810 kWh £523 £81 £604 £8,383 13.9 yrs £3,699
4 kW 3602 kWh 2521 kWh 1081 kWh £697 £108 £805 £10,011 12.4 yrs £6,098
5 kW 4502 kWh 3152 kWh 1351 kWh £872 £135 £1,007 £11,639 11.6 yrs £8,498
6 kW 5403 kWh 3782 kWh 1621 kWh £1,046 £162 £1,208 £13,267 11.0 yrs £10,897
7 kW 6303 kWh 4412 kWh 1891 kWh £1,220 £189 £1,410 £14,894 10.6 yrs £13,297
8 kW 7204 kWh 5043 kWh 2161 kWh £1,395 £216 £1,611 £16,522 10.3 yrs £15,696

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: £1,031, Upfront: £13,389, Break-even: 13.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1801 kWh 1315 kWh 486 kWh £364 £49 £412 £8,506 20.6 yrs £-260
3 kW 2701 kWh 1972 kWh 729 kWh £545 £73 £618 £10,133 16.4 yrs £2,235
4 kW 3602 kWh 2629 kWh 973 kWh £727 £97 £825 £11,761 14.3 yrs £4,730
5 kW 4502 kWh 3287 kWh 1216 kWh £909 £122 £1,031 £13,389 13.0 yrs £7,225
6 kW 5403 kWh 3944 kWh 1459 kWh £1,091 £146 £1,237 £15,017 12.1 yrs £9,719
7 kW 6303 kWh 4601 kWh 1702 kWh £1,273 £170 £1,443 £16,644 11.5 yrs £12,214
8 kW 7204 kWh 5259 kWh 1945 kWh £1,455 £195 £1,649 £18,272 11.1 yrs £14,709

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: £1,047, Upfront: £15,139, Break-even: 14.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1801 kWh 1351 kWh 450 kWh £374 £45 £419 £10,256 24.5 yrs £-1,883
3 kW 2701 kWh 2026 kWh 675 kWh £560 £68 £628 £11,883 18.9 yrs £676
4 kW 3602 kWh 2701 kWh 900 kWh £747 £90 £837 £13,511 16.1 yrs £3,234
5 kW 4502 kWh 3377 kWh 1126 kWh £934 £113 £1,047 £15,139 14.5 yrs £5,793
6 kW 5403 kWh 4052 kWh 1351 kWh £1,121 £135 £1,256 £16,767 13.4 yrs £8,351
7 kW 6303 kWh 4727 kWh 1576 kWh £1,308 £158 £1,465 £18,394 12.6 yrs £10,910
8 kW 7204 kWh 5403 kWh 1801 kWh £1,494 £180 £1,675 £20,022 12.0 yrs £13,468

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: £1,062, Upfront: £17,589, 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 1801 kWh 1387 kWh 414 kWh £384 £41 £425 £12,706 29.9 yrs £-4,206
3 kW 2701 kWh 2080 kWh 621 kWh £575 £62 £637 £14,333 22.5 yrs £-1,584
4 kW 3602 kWh 2773 kWh 828 kWh £767 £83 £850 £15,961 18.8 yrs £1,039
5 kW 4502 kWh 3467 kWh 1036 kWh £959 £104 £1,062 £17,589 16.6 yrs £3,661
6 kW 5403 kWh 4160 kWh 1243 kWh £1,151 £124 £1,275 £19,217 15.1 yrs £6,283
7 kW 6303 kWh 4854 kWh 1450 kWh £1,342 £145 £1,487 £20,844 14.0 yrs £8,905
8 kW 7204 kWh 5547 kWh 1657 kWh £1,534 £166 £1,700 £22,472 13.2 yrs £11,527

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

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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 LL28

Figures below are tailored to LL28 — click through for full league tables.

Big-Roof Britain Rank #407 of 2182
5.7 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #1625 of 2996
10.6 years (UK avg 10.8 years)
~£921 /yr • £9,767 upfront
Standing-Charge Drag Rank #1870 of 2996
28.0% (UK avg 26.6%) drag on savings
£258 fixed • ~£921 /yr value
Aspect Penalty View ranking →
East −17.9% West −21.0%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL28

Monthly generation per kilowatt of solar panels

kWh 25 Jan 47 Feb 82 Mar 109 Apr 121 May 117 Jun 112 Jul 103 Aug 82 Sep 57 Oct 31 Nov 17 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 39.5% 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 30 kWh per month; the average month produces around 75 kWh. So a typical 4 kW home system would generate roughly 119 kWh in winter, or 300 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
900kWh/kW
A 1 kW system generates ~900 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: 50% • Flats: 30% • Bungalows: 18% Based on 4,052 properties

Coverage

Conwy (100%)

Areas Covered

Llandrillo-yn-Rhos, Llansanffraid, Mochdre, Rhiw, Eglwys-bach a Llangernyw, Betws-yn-Rhos, Caerhun

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

LL29 (Conwy)
≈2.0 km away
Local sunshine: ~923 kWh/kWp · +3% vs LL28
LL31 (Conwy)
≈4.0 km away
Local sunshine: ~908 kWh/kWp · +1% vs LL28
LL30 (Conwy)
≈5.3 km away
Local sunshine: ~919 kWh/kWp · +2% vs LL28
LL32 (Conwy)
≈6.3 km away
Local sunshine: ~906 kWh/kWp · +1% vs LL28
LL22 (Conwy)
≈11.2 km away
Local sunshine: ~949 kWh/kWp · +5% vs LL28
LL34 (Conwy)
≈11.5 km away
Local sunshine: ~871 kWh/kWp · -3% vs LL28

Similar sunshine across the UK

KY9 (Fife)
~901 kWh/kWp · +0% vs LL28
DE4 (Derbyshire Dales)
~900 kWh/kWp · -0% vs LL28
ST6 (Stoke-on-Trent)
~900 kWh/kWp · -0% vs LL28