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Solar panel cost in Denbighshire (LL20)

See realistic solar installation costs, savings and payback for LL20 (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
14.7 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£692
What you save every year
Profit Over 25 Years
£7,127
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: Bigger systems don’t shorten payback—cost and savings rise together per kW.
  • 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

Costs: Battery prices are typically £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 24.43p/kWh with a 69.98p/day standing charge. Your postcode’s south-facing sunshine yield is 877 kWh/kW — 52 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 877 kWh per year on a south-facing roof. We value self-used electricity at 24.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
24.4p/kWh
Standing charge
70.0p/day
Sunshine yield (south)
877 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: £692, Upfront: £10,173, Break-even: 14.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1755 kWh 702 kWh 1053 kWh £171 £105 £277 £4,069 14.7 yrs £1,467
3 kW 2632 kWh 1053 kWh 1579 kWh £257 £158 £415 £6,104 14.7 yrs £2,200
4 kW 3510 kWh 1404 kWh 2106 kWh £343 £211 £554 £8,138 14.7 yrs £2,934
5 kW 4387 kWh 1755 kWh 2632 kWh £429 £263 £692 £10,173 14.7 yrs £3,667
6 kW 5265 kWh 2106 kWh 3159 kWh £514 £316 £830 £12,207 14.7 yrs £4,401
7 kW 6142 kWh 2457 kWh 3685 kWh £600 £369 £969 £14,242 14.7 yrs £5,134
8 kW 7020 kWh 2808 kWh 4212 kWh £686 £421 £1,107 £16,276 14.7 yrs £5,868

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £819, Upfront: £12,273, Break-even: 15.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1755 kWh 1053 kWh 702 kWh £257 £70 £327 £6,169 18.8 yrs £380
3 kW 2632 kWh 1579 kWh 1053 kWh £386 £105 £491 £8,204 16.7 yrs £1,620
4 kW 3510 kWh 2106 kWh 1404 kWh £514 £140 £655 £10,238 15.6 yrs £2,860
5 kW 4387 kWh 2632 kWh 1755 kWh £643 £175 £819 £12,273 15.0 yrs £4,100
6 kW 5265 kWh 3159 kWh 2106 kWh £772 £211 £982 £14,307 14.6 yrs £5,340
7 kW 6142 kWh 3685 kWh 2457 kWh £900 £246 £1,146 £16,342 14.3 yrs £6,580
8 kW 7020 kWh 4212 kWh 2808 kWh £1,029 £281 £1,310 £18,376 14.0 yrs £7,819

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £882, Upfront: £13,673, Break-even: 15.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1755 kWh 1228 kWh 526 kWh £300 £53 £353 £7,569 21.5 yrs £-514
3 kW 2632 kWh 1843 kWh 790 kWh £450 £79 £529 £9,604 18.1 yrs £980
4 kW 3510 kWh 2457 kWh 1053 kWh £600 £105 £706 £11,638 16.5 yrs £2,473
5 kW 4387 kWh 3071 kWh 1316 kWh £750 £132 £882 £13,673 15.5 yrs £3,966
6 kW 5265 kWh 3685 kWh 1579 kWh £900 £158 £1,058 £15,707 14.8 yrs £5,459
7 kW 6142 kWh 4300 kWh 1843 kWh £1,050 £184 £1,235 £17,742 14.4 yrs £6,952
8 kW 7020 kWh 4914 kWh 2106 kWh £1,200 £211 £1,411 £19,776 14.0 yrs £8,445

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £901, Upfront: £15,423, Break-even: 17.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1755 kWh 1281 kWh 474 kWh £313 £47 £360 £9,319 25.9 yrs £-2,112
3 kW 2632 kWh 1922 kWh 711 kWh £469 £71 £541 £11,354 21.0 yrs £-543
4 kW 3510 kWh 2562 kWh 948 kWh £626 £95 £721 £13,388 18.6 yrs £1,027
5 kW 4387 kWh 3203 kWh 1185 kWh £782 £118 £901 £15,423 17.1 yrs £2,596
6 kW 5265 kWh 3843 kWh 1422 kWh £939 £142 £1,081 £17,457 16.1 yrs £4,165
7 kW 6142 kWh 4484 kWh 1658 kWh £1,095 £166 £1,261 £19,492 15.5 yrs £5,734
8 kW 7020 kWh 5125 kWh 1895 kWh £1,252 £190 £1,441 £21,526 14.9 yrs £7,303

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £914, Upfront: £17,173, Break-even: 18.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1755 kWh 1316 kWh 439 kWh £322 £44 £365 £11,069 30.3 yrs £-3,760
3 kW 2632 kWh 1974 kWh 658 kWh £482 £66 £548 £13,104 23.9 yrs £-2,141
4 kW 3510 kWh 2632 kWh 877 kWh £643 £88 £731 £15,138 20.7 yrs £-521
5 kW 4387 kWh 3291 kWh 1097 kWh £804 £110 £914 £17,173 18.8 yrs £1,099
6 kW 5265 kWh 3949 kWh 1316 kWh £965 £132 £1,096 £19,207 17.5 yrs £2,719
7 kW 6142 kWh 4607 kWh 1536 kWh £1,125 £154 £1,279 £21,242 16.6 yrs £4,339
8 kW 7020 kWh 5265 kWh 1755 kWh £1,286 £175 £1,462 £23,276 15.9 yrs £5,958

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £926, Upfront: £19,623, Break-even: 21.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1755 kWh 1351 kWh 404 kWh £330 £40 £370 £13,519 36.5 yrs £-6,109
3 kW 2632 kWh 2027 kWh 605 kWh £495 £61 £556 £15,554 28.0 yrs £-4,439
4 kW 3510 kWh 2703 kWh 807 kWh £660 £81 £741 £17,588 23.7 yrs £-2,768
5 kW 4387 kWh 3378 kWh 1009 kWh £825 £101 £926 £19,623 21.2 yrs £-1,098
6 kW 5265 kWh 4054 kWh 1211 kWh £990 £121 £1,111 £21,657 19.5 yrs £573
7 kW 6142 kWh 4730 kWh 1413 kWh £1,155 £141 £1,297 £23,692 18.3 yrs £2,243
8 kW 7020 kWh 5405 kWh 1615 kWh £1,321 £161 £1,482 £25,726 17.4 yrs £3,914

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, 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.

Insights for LL20

Figures below are tailored to LL20 — click through for full league tables.

Big-Roof Britain Rank #638 of 2182
5.4 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #2116 of 2997
13.1 years (UK avg 12.6 years)
~£774 /yr • £10,173 upfront
Standing-Charge Drag Rank #2627 of 2997
33.5% (UK avg 24.6%) drag on savings
£259 fixed • ~£774 /yr value
Aspect Penalty View ranking →
East −18.5% West −16.4%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in LL20

Monthly generation per kilowatt of solar panels

kWh 17 Jan 45 Feb 81 Mar 106 Apr 119 May 114 Jun 115 Jul 104 Aug 85 Sep 56 Oct 28 Nov 7 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 31.6% 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 23 kWh per month; the average month produces around 73 kWh. So a typical 4 kW home system would generate roughly 92 kWh in winter, or 292 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
24.43p/kWh
Daily Fixed Charge
69.98p/day
Local Sunshine
877kWh/kW
A 1 kW system generates ~877 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: 73% • Flats: 12% • Bungalows: 13% Based on 2,267 properties

Coverage

Denbighshire (61%)|Wrexham (39%)

Areas Covered

Llangollen, Dyffryn Ceiriog, Llangollen Rural, Alyn Valley, Cefn West, Chirk South

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q1 2026

Installation costs: MCS certified installer data, March 2025

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

LL14 (Wrexham)
≈8.4 km away
Local sunshine: ~935 kWh/kWp · +7% vs LL20
LL11 (Wrexham)
≈14.2 km away
Local sunshine: ~939 kWh/kWp · +7% vs LL20
LL21 (Denbighshire)
≈14.5 km away
Local sunshine: ~785 kWh/kWp · -11% vs LL20
SY11 (Shropshire)
≈14.8 km away
Local sunshine: ~944 kWh/kWp · +8% vs LL20
LL13 (Wrexham)
≈15.5 km away
Local sunshine: ~937 kWh/kWp · +7% vs LL20
SY10 (Shropshire)
≈15.8 km away
Local sunshine: ~929 kWh/kWp · +6% vs LL20

Similar sunshine across the UK

KA23 (North Ayrshire)
~878 kWh/kWp · +0% vs LL20
EH1 (City of Edinburgh)
~878 kWh/kWp · +0% vs LL20
CA11 (Westmorland and Furness)
~877 kWh/kWp · -0% vs LL20