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Solar panel cost in North Ayrshire (KA27)

See realistic solar installation costs, savings and payback for KA27 (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
15.1 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£675
What you save every year
Profit Over 25 Years
£6,696
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 Northern Scotland, the current unit rate is 23.40p/kWh with a 58.28p/day standing charge. Your postcode’s south-facing sunshine yield is 879 kWh/kW — 64 above the regional median (815).

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 879 kWh per year on a south-facing roof. We value self-used electricity at 23.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
23.4p/kWh
Standing charge
58.3p/day
Sunshine yield (south)
879 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: £675, Upfront: £10,173, Break-even: 15.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1757 kWh 703 kWh 1054 kWh £164 £105 £270 £4,069 15.1 yrs £1,329
3 kW 2636 kWh 1054 kWh 1581 kWh £247 £158 £405 £6,104 15.1 yrs £1,993
4 kW 3514 kWh 1406 kWh 2109 kWh £329 £211 £540 £8,138 15.1 yrs £2,658
5 kW 4393 kWh 1757 kWh 2636 kWh £411 £264 £675 £10,173 15.1 yrs £3,322
6 kW 5271 kWh 2109 kWh 3163 kWh £493 £316 £810 £12,207 15.1 yrs £3,986
7 kW 6150 kWh 2460 kWh 3690 kWh £576 £369 £945 £14,242 15.1 yrs £4,651
8 kW 7028 kWh 2811 kWh 4217 kWh £658 £422 £1,080 £16,276 15.1 yrs £5,315

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: £792, Upfront: £12,273, 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 1757 kWh 1054 kWh 703 kWh £247 £70 £317 £6,169 19.5 yrs £171
3 kW 2636 kWh 1581 kWh 1054 kWh £370 £105 £475 £8,204 17.3 yrs £1,306
4 kW 3514 kWh 2109 kWh 1406 kWh £493 £141 £634 £10,238 16.1 yrs £2,441
5 kW 4393 kWh 2636 kWh 1757 kWh £617 £176 £792 £12,273 15.5 yrs £3,576
6 kW 5271 kWh 3163 kWh 2109 kWh £740 £211 £951 £14,307 15.0 yrs £4,712
7 kW 6150 kWh 3690 kWh 2460 kWh £863 £246 £1,109 £16,342 14.7 yrs £5,847
8 kW 7028 kWh 4217 kWh 2811 kWh £987 £281 £1,268 £18,376 14.5 yrs £6,982

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: £851, Upfront: £13,673, 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 1757 kWh 1230 kWh 527 kWh £288 £53 £341 £7,569 22.2 yrs £-759
3 kW 2636 kWh 1845 kWh 791 kWh £432 £79 £511 £9,604 18.8 yrs £612
4 kW 3514 kWh 2460 kWh 1054 kWh £576 £105 £681 £11,638 17.1 yrs £1,983
5 kW 4393 kWh 3075 kWh 1318 kWh £720 £132 £851 £13,673 16.1 yrs £3,354
6 kW 5271 kWh 3690 kWh 1581 kWh £863 £158 £1,022 £15,707 15.4 yrs £4,724
7 kW 6150 kWh 4305 kWh 1845 kWh £1,007 £184 £1,192 £17,742 14.9 yrs £6,095
8 kW 7028 kWh 4920 kWh 2109 kWh £1,151 £211 £1,362 £19,776 14.5 yrs £7,466

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: £869, Upfront: £15,423, Break-even: 17.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1757 kWh 1283 kWh 474 kWh £300 £47 £348 £9,319 26.8 yrs £-2,367
3 kW 2636 kWh 1924 kWh 712 kWh £450 £71 £521 £11,354 21.8 yrs £-926
4 kW 3514 kWh 2565 kWh 949 kWh £600 £95 £695 £13,388 19.3 yrs £516
5 kW 4393 kWh 3207 kWh 1186 kWh £750 £119 £869 £15,423 17.7 yrs £1,957
6 kW 5271 kWh 3848 kWh 1423 kWh £900 £142 £1,043 £17,457 16.7 yrs £3,398
7 kW 6150 kWh 4489 kWh 1660 kWh £1,051 £166 £1,217 £19,492 16.0 yrs £4,840
8 kW 7028 kWh 5131 kWh 1898 kWh £1,201 £190 £1,390 £21,526 15.5 yrs £6,281

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: £881, Upfront: £17,173, Break-even: 19.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1757 kWh 1318 kWh 439 kWh £308 £44 £352 £11,069 31.4 yrs £-4,023
3 kW 2636 kWh 1977 kWh 659 kWh £463 £66 £528 £13,104 24.8 yrs £-2,535
4 kW 3514 kWh 2636 kWh 879 kWh £617 £88 £705 £15,138 21.5 yrs £-1,046
5 kW 4393 kWh 3295 kWh 1098 kWh £771 £110 £881 £17,173 19.5 yrs £442
6 kW 5271 kWh 3953 kWh 1318 kWh £925 £132 £1,057 £19,207 18.2 yrs £1,931
7 kW 6150 kWh 4612 kWh 1537 kWh £1,079 £154 £1,233 £21,242 17.2 yrs £3,419
8 kW 7028 kWh 5271 kWh 1757 kWh £1,233 £176 £1,409 £23,276 16.5 yrs £4,908

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: £893, Upfront: £19,623, Break-even: 22.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1757 kWh 1353 kWh 404 kWh £317 £40 £357 £13,519 37.9 yrs £-6,379
3 kW 2636 kWh 2029 kWh 606 kWh £475 £61 £536 £15,554 29.0 yrs £-4,843
4 kW 3514 kWh 2706 kWh 808 kWh £633 £81 £714 £17,588 24.6 yrs £-3,308
5 kW 4393 kWh 3382 kWh 1010 kWh £791 £101 £893 £19,623 22.0 yrs £-1,772
6 kW 5271 kWh 4059 kWh 1212 kWh £950 £121 £1,071 £21,657 20.2 yrs £-237
7 kW 6150 kWh 4735 kWh 1414 kWh £1,108 £141 £1,250 £23,692 19.0 yrs £1,299
8 kW 7028 kWh 5412 kWh 1617 kWh £1,266 £162 £1,428 £25,726 18.0 yrs £2,835

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 KA27

Figures below are tailored to KA27 — click through for full league tables.

Solar Payback Index Rank #2383 of 2997
13.4 years (UK avg 12.6 years)
~£610 /yr • £8,138 upfront
Standing-Charge Drag Rank #2761 of 2997
37.1% (UK avg 24.6%) drag on savings
£227 fixed • ~£610 /yr value
Aspect Penalty View ranking →
East −18.4% West −22.2%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in KA27

Monthly generation per kilowatt of solar panels

kWh 21 Jan 40 Feb 73 Mar 109 Apr 125 May 119 Jun 118 Jul 104 Aug 76 Sep 48 Oct 28 Nov 17 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 35.1% 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 73 kWh. So a typical 4 kW home system would generate roughly 103 kWh in winter, or 293 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
23.40p/kWh
Daily Fixed Charge
58.28p/day
Local Sunshine
879kWh/kW
A 1 kW system generates ~879 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

No EPC data available for this outcode

Coverage

North Ayrshire (100%)

Areas Covered

Arran, Irvine 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 Northern Scotland

KA28 (North Ayrshire)
≈27.5 km away
Local sunshine: ~860 kWh/kWp · -2% vs KA27
PA28 (Argyll and Bute)
≈31.9 km away
Local sunshine: ~916 kWh/kWp · +4% vs KA27
PA20 (Argyll and Bute)
≈33.6 km away
Local sunshine: ~841 kWh/kWp · -4% vs KA27
PA29 (Argyll and Bute)
≈39.8 km away
Local sunshine: ~820 kWh/kWp · -7% vs KA27
PA41 (Argyll and Bute)
≈40.6 km away
Local sunshine: ~847 kWh/kWp · -4% vs KA27
PA21 (Argyll and Bute)
≈41.2 km away
Local sunshine: ~844 kWh/kWp · -4% vs KA27

Similar sunshine across the UK

LD5 (Powys)
~878 kWh/kWp · -0% vs KA27
EH2 (City of Edinburgh)
~878 kWh/kWp · -0% vs KA27
KA14 (North Ayrshire)
~878 kWh/kWp · -0% vs KA27