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Solar panel cost in Denbighshire (LL17)

See realistic solar installation costs, savings and payback for LL17 (Denbighshire) 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
10.3 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£946
What you save every year
Profit Over 25 Years
£13,876
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 924 kWh/kW — 6 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 924 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)
924 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: £788, Upfront: £8,139, Break-even: 10.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1847 kWh 739 kWh 1108 kWh £204 £111 £315 £3,256 10.3 yrs £3,049
3 kW 2771 kWh 1108 kWh 1663 kWh £307 £166 £473 £4,883 10.3 yrs £4,574
4 kW 3695 kWh 1478 kWh 2217 kWh £409 £222 £630 £6,511 10.3 yrs £6,098
5 kW 4618 kWh 1847 kWh 2771 kWh £511 £277 £788 £8,139 10.3 yrs £7,623
6 kW 5542 kWh 2217 kWh 3325 kWh £613 £333 £946 £9,767 10.3 yrs £9,147
7 kW 6466 kWh 2586 kWh 3879 kWh £715 £388 £1,103 £11,394 10.3 yrs £10,672
8 kW 7389 kWh 2956 kWh 4434 kWh £818 £443 £1,261 £13,022 10.3 yrs £12,197

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: £951, 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 1847 kWh 1108 kWh 739 kWh £307 £74 £380 £5,356 14.1 yrs £2,254
3 kW 2771 kWh 1663 kWh 1108 kWh £460 £111 £571 £6,983 12.2 yrs £4,431
4 kW 3695 kWh 2217 kWh 1478 kWh £613 £148 £761 £8,611 11.3 yrs £6,608
5 kW 4618 kWh 2771 kWh 1847 kWh £766 £185 £951 £10,239 10.8 yrs £8,785
6 kW 5542 kWh 3325 kWh 2217 kWh £920 £222 £1,141 £11,867 10.4 yrs £10,962
7 kW 6466 kWh 3879 kWh 2586 kWh £1,073 £259 £1,332 £13,494 10.1 yrs £13,139
8 kW 7389 kWh 4434 kWh 2956 kWh £1,226 £296 £1,522 £15,122 9.9 yrs £15,317

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: £1,033, 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 1847 kWh 1293 kWh 554 kWh £358 £55 £413 £6,756 16.4 yrs £1,507
3 kW 2771 kWh 1940 kWh 831 kWh £537 £83 £620 £8,383 13.5 yrs £4,010
4 kW 3695 kWh 2586 kWh 1108 kWh £715 £111 £826 £10,011 12.1 yrs £6,513
5 kW 4618 kWh 3233 kWh 1386 kWh £894 £139 £1,033 £11,639 11.3 yrs £9,017
6 kW 5542 kWh 3879 kWh 1663 kWh £1,073 £166 £1,239 £13,267 10.7 yrs £11,520
7 kW 6466 kWh 4526 kWh 1940 kWh £1,252 £194 £1,446 £14,894 10.3 yrs £14,023
8 kW 7389 kWh 5173 kWh 2217 kWh £1,431 £222 £1,652 £16,522 10.0 yrs £16,526

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: £1,057, 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 1847 kWh 1349 kWh 499 kWh £373 £50 £423 £8,506 20.1 yrs £-48
3 kW 2771 kWh 2023 kWh 748 kWh £560 £75 £634 £10,133 16.0 yrs £2,554
4 kW 3695 kWh 2697 kWh 998 kWh £746 £100 £846 £11,761 13.9 yrs £5,155
5 kW 4618 kWh 3371 kWh 1247 kWh £933 £125 £1,057 £13,389 12.7 yrs £7,756
6 kW 5542 kWh 4046 kWh 1496 kWh £1,119 £150 £1,269 £15,017 11.8 yrs £10,357
7 kW 6466 kWh 4720 kWh 1746 kWh £1,306 £175 £1,480 £16,644 11.2 yrs £12,958
8 kW 7389 kWh 5394 kWh 1995 kWh £1,492 £200 £1,692 £18,272 10.8 yrs £15,559

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: £1,074, Upfront: £15,139, Break-even: 14.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1847 kWh 1386 kWh 462 kWh £383 £46 £429 £10,256 23.9 yrs £-1,667
3 kW 2771 kWh 2078 kWh 693 kWh £575 £69 £644 £11,883 18.4 yrs £999
4 kW 3695 kWh 2771 kWh 924 kWh £766 £92 £859 £13,511 15.7 yrs £3,666
5 kW 4618 kWh 3464 kWh 1155 kWh £958 £115 £1,074 £15,139 14.1 yrs £6,332
6 kW 5542 kWh 4157 kWh 1386 kWh £1,150 £139 £1,288 £16,767 13.0 yrs £8,999
7 kW 6466 kWh 4849 kWh 1616 kWh £1,341 £162 £1,503 £18,394 12.2 yrs £11,665
8 kW 7389 kWh 5542 kWh 1847 kWh £1,533 £185 £1,718 £20,022 11.7 yrs £14,331

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: £1,090, Upfront: £17,589, Break-even: 16.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1847 kWh 1422 kWh 425 kWh £393 £42 £436 £12,706 29.1 yrs £-3,987
3 kW 2771 kWh 2134 kWh 637 kWh £590 £64 £654 £14,333 21.9 yrs £-1,255
4 kW 3695 kWh 2845 kWh 850 kWh £787 £85 £872 £15,961 18.3 yrs £1,477
5 kW 4618 kWh 3556 kWh 1062 kWh £984 £106 £1,090 £17,589 16.1 yrs £4,208
6 kW 5542 kWh 4267 kWh 1275 kWh £1,180 £127 £1,308 £19,217 14.7 yrs £6,940
7 kW 6466 kWh 4979 kWh 1487 kWh £1,377 £149 £1,526 £20,844 13.7 yrs £9,672
8 kW 7389 kWh 5690 kWh 1700 kWh £1,574 £170 £1,744 £22,472 12.9 yrs £12,403

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 Denbighshire

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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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 LL17

Figures below are tailored to LL17 — click through for full league tables.

Big-Roof Britain Rank #316 of 2182
5.9 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #1387 of 2996
10.3 years (UK avg 10.8 years)
~£946 /yr • £9,767 upfront
Standing-Charge Drag Rank #1780 of 2996
27.3% (UK avg 26.6%) drag on savings
£258 fixed • ~£946 /yr value
Aspect Penalty View ranking →
East −19.7% West −21.1%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL17

Monthly generation per kilowatt of solar panels

kWh 33 Jan 49 Feb 82 Mar 108 Apr 120 May 115 Jun 112 Jul 100 Aug 82 Sep 58 Oct 37 Nov 28 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 47.5% 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 37 kWh per month; the average month produces around 77 kWh. So a typical 4 kW home system would generate roughly 146 kWh in winter, or 308 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
924kWh/kW
A 1 kW system generates ~924 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: 59% • Flats: 13% • Bungalows: 28% Based on 1,665 properties

Coverage

Denbighshire (99%)|Conwy (1%)

Areas Covered

St Asaph East, St Asaph West, Tremeirchion, Trefnant, Bodelwyddan, Rhyl South West, Llansannan, Dyserth

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

LL18 (Denbighshire)
≈7.3 km away
Local sunshine: ~933 kWh/kWp · +1% vs LL17
LL16 (Denbighshire)
≈8.1 km away
Local sunshine: ~924 kWh/kWp · +0% vs LL17
LL19 (Denbighshire)
≈8.9 km away
Local sunshine: ~918 kWh/kWp · -1% vs LL17
LL22 (Conwy)
≈10.0 km away
Local sunshine: ~949 kWh/kWp · +3% vs LL17
CH8 (Flintshire)
≈14.7 km away
Local sunshine: ~925 kWh/kWp · +0% vs LL17
LL15 (Denbighshire)
≈18.0 km away
Local sunshine: ~885 kWh/kWp · -4% vs LL17

Similar sunshine across the UK

DL3 (Darlington)
~924 kWh/kWp · +0% vs LL17
S14 (Sheffield)
~924 kWh/kWp · +0% vs LL17
DY8 (Dudley)
~924 kWh/kWp · -0% vs LL17