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Solar panel cost in North Ayrshire (KA15)

See realistic solar installation costs, savings and payback for KA15 (North Ayrshire) 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
11.8 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£830
What you save every year
Profit Over 25 Years
£10,993
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 Southern Scotland, the current unit rate is 25.85p/kWh with a 64.17p/day standing charge. Your postcode’s south-facing sunshine yield is 847 kWh/kW — 3 below the regional median (850).

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 847 kWh per year on a south-facing roof. We value self-used electricity at 25.9p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
25.9p/kWh
Standing charge
64.2p/day
Sunshine yield (south)
847 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: £8,139, Break-even: 11.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1694 kWh 678 kWh 1016 kWh £175 £102 £277 £3,256 11.8 yrs £2,280
3 kW 2541 kWh 1016 kWh 1525 kWh £263 £152 £415 £4,883 11.8 yrs £3,421
4 kW 3388 kWh 1355 kWh 2033 kWh £350 £203 £554 £6,511 11.8 yrs £4,561
5 kW 4235 kWh 1694 kWh 2541 kWh £438 £254 £692 £8,139 11.8 yrs £5,701
6 kW 5082 kWh 2033 kWh 3049 kWh £525 £305 £830 £9,767 11.8 yrs £6,841
7 kW 5929 kWh 2372 kWh 3557 kWh £613 £356 £969 £11,394 11.8 yrs £7,981
8 kW 6776 kWh 2710 kWh 4066 kWh £701 £407 £1,107 £13,022 11.8 yrs £9,121

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: £826, Upfront: £10,239, Break-even: 12.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1694 kWh 1016 kWh 678 kWh £263 £68 £330 £5,356 16.2 yrs £1,254
3 kW 2541 kWh 1525 kWh 1016 kWh £394 £102 £496 £6,983 14.1 yrs £2,931
4 kW 3388 kWh 2033 kWh 1355 kWh £525 £136 £661 £8,611 13.0 yrs £4,609
5 kW 4235 kWh 2541 kWh 1694 kWh £657 £169 £826 £10,239 12.4 yrs £6,286
6 kW 5082 kWh 3049 kWh 2033 kWh £788 £203 £991 £11,867 12.0 yrs £7,963
7 kW 5929 kWh 3557 kWh 2372 kWh £920 £237 £1,157 £13,494 11.7 yrs £9,640
8 kW 6776 kWh 4066 kWh 2710 kWh £1,051 £271 £1,322 £15,122 11.4 yrs £11,317

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: £893, Upfront: £11,639, 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 1694 kWh 1186 kWh 508 kWh £307 £51 £357 £6,756 18.9 yrs £391
3 kW 2541 kWh 1779 kWh 762 kWh £460 £76 £536 £8,383 15.6 yrs £2,337
4 kW 3388 kWh 2372 kWh 1016 kWh £613 £102 £715 £10,011 14.0 yrs £4,283
5 kW 4235 kWh 2964 kWh 1270 kWh £766 £127 £893 £11,639 13.0 yrs £6,228
6 kW 5082 kWh 3557 kWh 1525 kWh £920 £152 £1,072 £13,267 12.4 yrs £8,174
7 kW 5929 kWh 4150 kWh 1779 kWh £1,073 £178 £1,251 £14,894 11.9 yrs £10,120
8 kW 6776 kWh 4743 kWh 2033 kWh £1,226 £203 £1,429 £16,522 11.6 yrs £12,065

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: £913, Upfront: £13,389, 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 1694 kWh 1237 kWh 457 kWh £320 £46 £365 £8,506 23.3 yrs £-1,198
3 kW 2541 kWh 1855 kWh 686 kWh £479 £69 £548 £10,133 18.5 yrs £829
4 kW 3388 kWh 2473 kWh 915 kWh £639 £91 £731 £11,761 16.1 yrs £2,855
5 kW 4235 kWh 3091 kWh 1143 kWh £799 £114 £913 £13,389 14.7 yrs £4,881
6 kW 5082 kWh 3710 kWh 1372 kWh £959 £137 £1,096 £15,017 13.7 yrs £6,907
7 kW 5929 kWh 4328 kWh 1601 kWh £1,119 £160 £1,279 £16,644 13.0 yrs £8,933
8 kW 6776 kWh 4946 kWh 1829 kWh £1,279 £183 £1,462 £18,272 12.5 yrs £10,960

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: £927, Upfront: £15,139, Break-even: 16.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1694 kWh 1270 kWh 423 kWh £328 £42 £371 £10,256 27.7 yrs £-2,840
3 kW 2541 kWh 1906 kWh 635 kWh £493 £64 £556 £11,883 21.4 yrs £-760
4 kW 3388 kWh 2541 kWh 847 kWh £657 £85 £742 £13,511 18.2 yrs £1,320
5 kW 4235 kWh 3176 kWh 1059 kWh £821 £106 £927 £15,139 16.3 yrs £3,399
6 kW 5082 kWh 3811 kWh 1270 kWh £985 £127 £1,112 £16,767 15.1 yrs £5,479
7 kW 5929 kWh 4447 kWh 1482 kWh £1,149 £148 £1,298 £18,394 14.2 yrs £7,559
8 kW 6776 kWh 5082 kWh 1694 kWh £1,314 £169 £1,483 £20,022 13.5 yrs £9,639

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: £940, Upfront: £17,589, Break-even: 18.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1694 kWh 1304 kWh 390 kWh £337 £39 £376 £12,706 33.8 yrs £-5,183
3 kW 2541 kWh 1957 kWh 584 kWh £506 £58 £564 £14,333 25.4 yrs £-3,049
4 kW 3388 kWh 2609 kWh 779 kWh £674 £78 £752 £15,961 21.2 yrs £-916
5 kW 4235 kWh 3261 kWh 974 kWh £843 £97 £940 £17,589 18.7 yrs £1,218
6 kW 5082 kWh 3913 kWh 1169 kWh £1,012 £117 £1,128 £19,217 17.0 yrs £3,352
7 kW 5929 kWh 4565 kWh 1364 kWh £1,180 £136 £1,316 £20,844 15.8 yrs £5,485
8 kW 6776 kWh 5217 kWh 1558 kWh £1,349 £156 £1,505 £22,472 14.9 yrs £7,619

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 North Ayrshire

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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Insights for KA15

Figures below are tailored to KA15 — click through for full league tables.

Solar Payback Index Rank #2404 of 2996
11.8 years (UK avg 10.8 years)
~£830 /yr • £9,767 upfront
Standing-Charge Drag Rank #1894 of 2996
28.2% (UK avg 26.6%) drag on savings
£234 fixed • ~£830 /yr value
Aspect Penalty View ranking →
East −18.7% West −21.3%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in KA15

Monthly generation per kilowatt of solar panels

kWh 22 Jan 39 Feb 71 Mar 105 Apr 117 May 113 Jun 112 Jul 98 Aug 73 Sep 49 Oct 31 Nov 17 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 36.9% 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 71 kWh. So a typical 4 kW home system would generate roughly 104 kWh in winter, or 282 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
25.85p/kWh
Daily Fixed Charge
64.17p/day
Local Sunshine
847kWh/kW
A 1 kW system generates ~847 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

No EPC data available for this outcode

Coverage

North Ayrshire (100%)

Areas Covered

Garnock Valley, Kilwinning

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 Southern Scotland

KA14 (North Ayrshire)
≈2.9 km away
Local sunshine: ~878 kWh/kWp · +4% vs KA15
KA25 (North Ayrshire)
≈3.5 km away
Local sunshine: ~856 kWh/kWp · +1% vs KA15
PA12 (Renfrewshire)
≈5.1 km away
Local sunshine: ~848 kWh/kWp · +0% vs KA15
KA24 (North Ayrshire)
≈7.2 km away
Local sunshine: ~892 kWh/kWp · +5% vs KA15
PA9 (Renfrewshire)
≈8.2 km away
Local sunshine: ~825 kWh/kWp · -3% vs KA15
PA10 (Renfrewshire)
≈10.7 km away
Local sunshine: ~832 kWh/kWp · -2% vs KA15

Similar sunshine across the UK

PH5 (Perth and Kinross)
~847 kWh/kWp · +0% vs KA15
SK12 (High Peak)
~847 kWh/kWp · +0% vs KA15
PA41 (Argyll and Bute)
~847 kWh/kWp · -0% vs KA15