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Solar panel cost in East Ayrshire (KA4)

See realistic solar installation costs, savings and payback for KA4 (East 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
12.2 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£798
What you save every year
Profit Over 25 Years
£10,192
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 814 kWh/kW — 35 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 814 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)
814 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: £665, Upfront: £8,139, Break-even: 12.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1629 kWh 651 kWh 977 kWh £168 £98 £266 £3,256 12.2 yrs £2,067
3 kW 2443 kWh 977 kWh 1466 kWh £253 £147 £399 £4,883 12.2 yrs £3,100
4 kW 3257 kWh 1303 kWh 1954 kWh £337 £195 £532 £6,511 12.2 yrs £4,133
5 kW 4071 kWh 1629 kWh 2443 kWh £421 £244 £665 £8,139 12.2 yrs £5,167
6 kW 4886 kWh 1954 kWh 2931 kWh £505 £293 £798 £9,767 12.2 yrs £6,200
7 kW 5700 kWh 2280 kWh 3420 kWh £589 £342 £931 £11,394 12.2 yrs £7,233
8 kW 6514 kWh 2606 kWh 3909 kWh £674 £391 £1,064 £13,022 12.2 yrs £8,267

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: £794, Upfront: £10,239, Break-even: 12.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1629 kWh 977 kWh 651 kWh £253 £65 £318 £5,356 16.9 yrs £999
3 kW 2443 kWh 1466 kWh 977 kWh £379 £98 £477 £6,983 14.7 yrs £2,549
4 kW 3257 kWh 1954 kWh 1303 kWh £505 £130 £635 £8,611 13.6 yrs £4,098
5 kW 4071 kWh 2443 kWh 1629 kWh £631 £163 £794 £10,239 12.9 yrs £5,648
6 kW 4886 kWh 2931 kWh 1954 kWh £758 £195 £953 £11,867 12.4 yrs £7,198
7 kW 5700 kWh 3420 kWh 2280 kWh £884 £228 £1,112 £13,494 12.1 yrs £8,747
8 kW 6514 kWh 3909 kWh 2606 kWh £1,010 £261 £1,271 £15,122 11.9 yrs £10,297

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: £859, Upfront: £11,639, Break-even: 13.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1629 kWh 1140 kWh 489 kWh £295 £49 £344 £6,756 19.7 yrs £115
3 kW 2443 kWh 1710 kWh 733 kWh £442 £73 £515 £8,383 16.3 yrs £1,923
4 kW 3257 kWh 2280 kWh 977 kWh £589 £98 £687 £10,011 14.6 yrs £3,731
5 kW 4071 kWh 2850 kWh 1221 kWh £737 £122 £859 £11,639 13.6 yrs £5,539
6 kW 4886 kWh 3420 kWh 1466 kWh £884 £147 £1,031 £13,267 12.9 yrs £7,346
7 kW 5700 kWh 3990 kWh 1710 kWh £1,031 £171 £1,202 £14,894 12.4 yrs £9,154
8 kW 6514 kWh 4560 kWh 1954 kWh £1,179 £195 £1,374 £16,522 12.0 yrs £10,962

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: £878, Upfront: £13,389, Break-even: 15.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1629 kWh 1189 kWh 440 kWh £307 £44 £351 £8,506 24.2 yrs £-1,480
3 kW 2443 kWh 1783 kWh 660 kWh £461 £66 £527 £10,133 19.2 yrs £406
4 kW 3257 kWh 2378 kWh 879 kWh £615 £88 £703 £11,761 16.7 yrs £2,291
5 kW 4071 kWh 2972 kWh 1099 kWh £768 £110 £878 £13,389 15.2 yrs £4,176
6 kW 4886 kWh 3567 kWh 1319 kWh £922 £132 £1,054 £15,017 14.2 yrs £6,061
7 kW 5700 kWh 4161 kWh 1539 kWh £1,076 £154 £1,230 £16,644 13.5 yrs £7,946
8 kW 6514 kWh 4755 kWh 1759 kWh £1,229 £176 £1,405 £18,272 13.0 yrs £9,831

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: £891, Upfront: £15,139, Break-even: 17.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1629 kWh 1221 kWh 407 kWh £316 £41 £356 £10,256 28.8 yrs £-3,126
3 kW 2443 kWh 1832 kWh 611 kWh £474 £61 £535 £11,883 22.2 yrs £-1,190
4 kW 3257 kWh 2443 kWh 814 kWh £631 £81 £713 £13,511 19.0 yrs £747
5 kW 4071 kWh 3054 kWh 1018 kWh £789 £102 £891 £15,139 17.0 yrs £2,684
6 kW 4886 kWh 3664 kWh 1221 kWh £947 £122 £1,069 £16,767 15.7 yrs £4,621
7 kW 5700 kWh 4275 kWh 1425 kWh £1,105 £143 £1,248 £18,394 14.7 yrs £6,558
8 kW 6514 kWh 4886 kWh 1629 kWh £1,263 £163 £1,426 £20,022 14.0 yrs £8,494

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: £904, Upfront: £17,589, 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 1629 kWh 1254 kWh 375 kWh £324 £37 £362 £12,706 35.1 yrs £-5,473
3 kW 2443 kWh 1881 kWh 562 kWh £486 £56 £542 £14,333 26.4 yrs £-3,485
4 kW 3257 kWh 2508 kWh 749 kWh £648 £75 £723 £15,961 22.1 yrs £-1,496
5 kW 4071 kWh 3135 kWh 936 kWh £810 £94 £904 £17,589 19.5 yrs £492
6 kW 4886 kWh 3762 kWh 1124 kWh £972 £112 £1,085 £19,217 17.7 yrs £2,481
7 kW 5700 kWh 4389 kWh 1311 kWh £1,135 £131 £1,266 £20,844 16.5 yrs £4,469
8 kW 6514 kWh 5016 kWh 1498 kWh £1,297 £150 £1,446 £22,472 15.5 yrs £6,457

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 East 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 KA4

Figures below are tailored to KA4 — click through for full league tables.

Solar Payback Index Rank #2605 of 2996
12.2 years (UK avg 10.8 years)
~£798 /yr • £9,767 upfront
Standing-Charge Drag Rank #2095 of 2996
29.3% (UK avg 26.6%) drag on savings
£234 fixed • ~£798 /yr value
Aspect Penalty View ranking →
East −18.3% West −19.6%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in KA4

Monthly generation per kilowatt of solar panels

kWh 21 Jan 38 Feb 69 Mar 101 Apr 113 May 106 Jun 105 Jul 93 Aug 71 Sep 48 Oct 31 Nov 18 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 37.7% 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 68 kWh. So a typical 4 kW home system would generate roughly 102 kWh in winter, or 271 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
25.85p/kWh
Daily Fixed Charge
64.17p/day
Local Sunshine
814kWh/kW
A 1 kW system generates ~814 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

East Ayrshire (100%)

Areas Covered

Irvine Valley, Annick, Ballochmyle, Kilmarnock West and Crosshouse

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

KA16 (East Ayrshire)
≈3.6 km away
Local sunshine: ~803 kWh/kWp · -1% vs KA4
KA17 (East Ayrshire)
≈6.4 km away
Local sunshine: ~813 kWh/kWp · -0% vs KA4
KA1 (East Ayrshire)
≈7.2 km away
Local sunshine: ~866 kWh/kWp · +6% vs KA4
KA3 (East Ayrshire)
≈8.0 km away
Local sunshine: ~851 kWh/kWp · +4% vs KA4
KA5 (East Ayrshire)
≈9.7 km away
Local sunshine: ~847 kWh/kWp · +4% vs KA4
KA2 (East Ayrshire)
≈10.9 km away
Local sunshine: ~865 kWh/kWp · +6% vs KA4

Similar sunshine across the UK

IV20 (Highland)
~814 kWh/kWp · -0% vs KA4
KW6 (Highland)
~814 kWh/kWp · -0% vs KA4
OL3 (Oldham)
~815 kWh/kWp · +0% vs KA4