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Solar panel cost in South Ayrshire (KA9)

See realistic solar installation costs, savings and payback for KA9 (South 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
13.6 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£900
What you save every year
Profit Over 25 Years
£10,292
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 Southern Scotland, the current unit rate is 27.18p/kWh with a 57.62p/day standing charge. Your postcode’s south-facing sunshine yield is 889 kWh/kW — 39 above 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 889 kWh per year on a south-facing roof. We value self-used electricity at 27.2p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
27.2p/kWh
Standing charge
57.6p/day
Sunshine yield (south)
889 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: £750, Upfront: £10,173, 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 1778 kWh 711 kWh 1067 kWh £193 £107 £300 £4,069 13.6 yrs £1,931
3 kW 2667 kWh 1067 kWh 1600 kWh £290 £160 £450 £6,104 13.6 yrs £2,896
4 kW 3556 kWh 1422 kWh 2134 kWh £387 £213 £600 £8,138 13.6 yrs £3,861
5 kW 4445 kWh 1778 kWh 2667 kWh £483 £267 £750 £10,173 13.6 yrs £4,827
6 kW 5334 kWh 2134 kWh 3200 kWh £580 £320 £900 £12,207 13.6 yrs £5,792
7 kW 6223 kWh 2489 kWh 3734 kWh £677 £373 £1,050 £14,242 13.6 yrs £6,758
8 kW 7112 kWh 2845 kWh 4267 kWh £773 £427 £1,200 £16,276 13.6 yrs £7,723

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: £903, Upfront: £12,273, 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 1778 kWh 1067 kWh 711 kWh £290 £71 £361 £6,169 17.1 yrs £1,053
3 kW 2667 kWh 1600 kWh 1067 kWh £435 £107 £542 £8,204 15.1 yrs £2,629
4 kW 3556 kWh 2134 kWh 1422 kWh £580 £142 £722 £10,238 14.2 yrs £4,205
5 kW 4445 kWh 2667 kWh 1778 kWh £725 £178 £903 £12,273 13.6 yrs £5,781
6 kW 5334 kWh 3200 kWh 2134 kWh £870 £213 £1,083 £14,307 13.2 yrs £7,358
7 kW 6223 kWh 3734 kWh 2489 kWh £1,015 £249 £1,264 £16,342 12.9 yrs £8,934
8 kW 7112 kWh 4267 kWh 2845 kWh £1,160 £284 £1,444 £18,376 12.7 yrs £10,510

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: £979, Upfront: £13,673, Break-even: 14.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1778 kWh 1245 kWh 533 kWh £338 £53 £392 £7,569 19.3 yrs £264
3 kW 2667 kWh 1867 kWh 800 kWh £507 £80 £587 £9,604 16.3 yrs £2,145
4 kW 3556 kWh 2489 kWh 1067 kWh £677 £107 £783 £11,638 14.9 yrs £4,027
5 kW 4445 kWh 3112 kWh 1334 kWh £846 £133 £979 £13,673 14.0 yrs £5,909
6 kW 5334 kWh 3734 kWh 1600 kWh £1,015 £160 £1,175 £15,707 13.4 yrs £7,791
7 kW 6223 kWh 4356 kWh 1867 kWh £1,184 £187 £1,371 £17,742 12.9 yrs £9,672
8 kW 7112 kWh 4978 kWh 2134 kWh £1,353 £213 £1,567 £19,776 12.6 yrs £11,554

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: £1,002, Upfront: £15,423, Break-even: 15.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1778 kWh 1298 kWh 480 kWh £353 £48 £401 £9,319 23.3 yrs £-1,303
3 kW 2667 kWh 1947 kWh 720 kWh £529 £72 £601 £11,354 18.9 yrs £670
4 kW 3556 kWh 2596 kWh 960 kWh £706 £96 £802 £13,388 16.7 yrs £2,644
5 kW 4445 kWh 3245 kWh 1200 kWh £882 £120 £1,002 £15,423 15.4 yrs £4,617
6 kW 5334 kWh 3894 kWh 1440 kWh £1,058 £144 £1,202 £17,457 14.5 yrs £6,590
7 kW 6223 kWh 4543 kWh 1680 kWh £1,235 £168 £1,403 £19,492 13.9 yrs £8,564
8 kW 7112 kWh 5192 kWh 1920 kWh £1,411 £192 £1,603 £21,526 13.4 yrs £10,537

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: £1,017, Upfront: £17,173, Break-even: 16.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1778 kWh 1334 kWh 445 kWh £362 £44 £407 £11,069 27.2 yrs £-2,931
3 kW 2667 kWh 2000 kWh 667 kWh £544 £67 £610 £13,104 21.5 yrs £-897
4 kW 3556 kWh 2667 kWh 889 kWh £725 £89 £814 £15,138 18.6 yrs £1,138
5 kW 4445 kWh 3334 kWh 1111 kWh £906 £111 £1,017 £17,173 16.9 yrs £3,172
6 kW 5334 kWh 4001 kWh 1334 kWh £1,087 £133 £1,221 £19,207 15.7 yrs £5,207
7 kW 6223 kWh 4667 kWh 1556 kWh £1,269 £156 £1,424 £21,242 14.9 yrs £7,241
8 kW 7112 kWh 5334 kWh 1778 kWh £1,450 £178 £1,628 £23,276 14.3 yrs £9,276

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: £1,033, Upfront: £19,623, Break-even: 19.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1778 kWh 1369 kWh 409 kWh £372 £41 £413 £13,519 32.7 yrs £-5,259
3 kW 2667 kWh 2054 kWh 613 kWh £558 £61 £620 £15,554 25.1 yrs £-3,163
4 kW 3556 kWh 2738 kWh 818 kWh £744 £82 £826 £17,588 21.3 yrs £-1,068
5 kW 4445 kWh 3423 kWh 1022 kWh £930 £102 £1,033 £19,623 19.0 yrs £1,028
6 kW 5334 kWh 4107 kWh 1227 kWh £1,116 £123 £1,239 £21,657 17.5 yrs £3,123
7 kW 6223 kWh 4792 kWh 1431 kWh £1,302 £143 £1,446 £23,692 16.4 yrs £5,219
8 kW 7112 kWh 5476 kWh 1636 kWh £1,488 £164 £1,652 £25,726 15.6 yrs £7,315

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 KA9

Figures below are tailored to KA9 — click through for full league tables.

Solar Payback Index Rank #2511 of 2997
13.6 years (UK avg 12.6 years)
~£900 /yr • £12,207 upfront
Standing-Charge Drag Rank #1543 of 2997
23.4% (UK avg 24.6%) drag on savings
£210 fixed • ~£900 /yr value
Aspect Penalty View ranking →
East −20.4% West −21.7%
Typical output loss versus a south-facing roof (lower is better)

Your Area at a Glance

Your Electricity Rate
27.18p/kWh
Daily Fixed Charge
57.62p/day
Local Sunshine
889kWh/kW
A 1 kW system generates ~889 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

South Ayrshire (100%)

Areas Covered

Prestwick, Kyle, Troon

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 Southern Scotland

KA8 (South Ayrshire)
≈3.1 km away
Local sunshine: ~886 kWh/kWp · -0% vs KA9
KA7 (South Ayrshire)
≈5.3 km away
Local sunshine: ~885 kWh/kWp · -0% vs KA9
KA10 (South Ayrshire)
≈6.1 km away
Local sunshine: ~883 kWh/kWp · -1% vs KA9
KA6 (East Ayrshire)
≈9.2 km away
Local sunshine: ~879 kWh/kWp · -1% vs KA9
KA2 (East Ayrshire)
≈11.7 km away
Local sunshine: ~865 kWh/kWp · -3% vs KA9
KA11 (North Ayrshire)
≈13.2 km away
Local sunshine: ~890 kWh/kWp · +0% vs KA9

Similar sunshine across the UK

BD21 (Bradford)
~889 kWh/kWp · -0% vs KA9
BT26 (Lisburn and Castlereagh)
~889 kWh/kWp · -0% vs KA9
TS9 (North Yorkshire)
~889 kWh/kWp · +0% vs KA9