Solar panel cost in Argyll and Bute (PA34)

See realistic solar installation costs, savings and payback for PA34 (Argyll and Bute) 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
16.9 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£600
What you save every year
Profit Over 25 Years
£4,839
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

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 782 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)
782 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: £600, Upfront: £10,173, 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 1564 kWh 625 kWh 938 kWh £146 £94 £240 £4,069 16.9 yrs £735
3 kW 2346 kWh 938 kWh 1407 kWh £220 £141 £360 £6,104 16.9 yrs £1,102
4 kW 3127 kWh 1251 kWh 1876 kWh £293 £188 £480 £8,138 16.9 yrs £1,469
5 kW 3909 kWh 1564 kWh 2346 kWh £366 £235 £600 £10,173 16.9 yrs £1,837
6 kW 4691 kWh 1876 kWh 2815 kWh £439 £281 £721 £12,207 16.9 yrs £2,204
7 kW 5473 kWh 2189 kWh 3284 kWh £512 £328 £841 £14,242 16.9 yrs £2,572
8 kW 6255 kWh 2502 kWh 3753 kWh £585 £375 £961 £16,276 16.9 yrs £2,939

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: £705, Upfront: £12,273, Break-even: 17.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1564 kWh 938 kWh 625 kWh £220 £63 £282 £6,169 21.9 yrs £-527
3 kW 2346 kWh 1407 kWh 938 kWh £329 £94 £423 £8,204 19.4 yrs £259
4 kW 3127 kWh 1876 kWh 1251 kWh £439 £125 £564 £10,238 18.1 yrs £1,046
5 kW 3909 kWh 2346 kWh 1564 kWh £549 £156 £705 £12,273 17.4 yrs £1,832
6 kW 4691 kWh 2815 kWh 1876 kWh £659 £188 £846 £14,307 16.9 yrs £2,619
7 kW 5473 kWh 3284 kWh 2189 kWh £768 £219 £987 £16,342 16.6 yrs £3,405
8 kW 6255 kWh 3753 kWh 2502 kWh £878 £250 £1,128 £18,376 16.3 yrs £4,192

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: £758, Upfront: £13,673, Break-even: 18.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1564 kWh 1095 kWh 469 kWh £256 £47 £303 £7,569 25.0 yrs £-1,508
3 kW 2346 kWh 1642 kWh 704 kWh £384 £70 £455 £9,604 21.1 yrs £-512
4 kW 3127 kWh 2189 kWh 938 kWh £512 £94 £606 £11,638 19.2 yrs £484
5 kW 3909 kWh 2737 kWh 1173 kWh £640 £117 £758 £13,673 18.0 yrs £1,480
6 kW 4691 kWh 3284 kWh 1407 kWh £768 £141 £909 £15,707 17.3 yrs £2,476
7 kW 5473 kWh 3831 kWh 1642 kWh £896 £164 £1,061 £17,742 16.7 yrs £3,472
8 kW 6255 kWh 4378 kWh 1876 kWh £1,025 £188 £1,212 £19,776 16.3 yrs £4,468

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: £773, Upfront: £15,423, Break-even: 19.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1564 kWh 1142 kWh 422 kWh £267 £42 £309 £9,319 30.1 yrs £-3,132
3 kW 2346 kWh 1712 kWh 633 kWh £401 £63 £464 £11,354 24.5 yrs £-2,073
4 kW 3127 kWh 2283 kWh 844 kWh £534 £84 £619 £13,388 21.6 yrs £-1,015
5 kW 3909 kWh 2854 kWh 1056 kWh £668 £106 £773 £15,423 19.9 yrs £44
6 kW 4691 kWh 3425 kWh 1267 kWh £801 £127 £928 £17,457 18.8 yrs £1,103
7 kW 5473 kWh 3995 kWh 1478 kWh £935 £148 £1,083 £19,492 18.0 yrs £2,162
8 kW 6255 kWh 4566 kWh 1689 kWh £1,068 £169 £1,237 £21,526 17.4 yrs £3,221

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: £784, Upfront: £17,173, Break-even: 21.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1564 kWh 1173 kWh 391 kWh £274 £39 £314 £11,069 35.3 yrs £-4,799
3 kW 2346 kWh 1759 kWh 586 kWh £412 £59 £470 £13,104 27.9 yrs £-3,698
4 kW 3127 kWh 2346 kWh 782 kWh £549 £78 £627 £15,138 24.1 yrs £-2,597
5 kW 3909 kWh 2932 kWh 977 kWh £686 £98 £784 £17,173 21.9 yrs £-1,496
6 kW 4691 kWh 3518 kWh 1173 kWh £823 £117 £941 £19,207 20.4 yrs £-396
7 kW 5473 kWh 4105 kWh 1368 kWh £961 £137 £1,097 £21,242 19.4 yrs £705
8 kW 6255 kWh 4691 kWh 1564 kWh £1,098 £156 £1,254 £23,276 18.6 yrs £1,806

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: £794, Upfront: £19,623, Break-even: 24.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1564 kWh 1204 kWh 360 kWh £282 £36 £318 £13,519 42.6 yrs £-7,165
3 kW 2346 kWh 1806 kWh 539 kWh £423 £54 £477 £15,554 32.6 yrs £-6,022
4 kW 3127 kWh 2408 kWh 719 kWh £564 £72 £635 £17,588 27.7 yrs £-4,879
5 kW 3909 kWh 3010 kWh 899 kWh £704 £90 £794 £19,623 24.7 yrs £-3,737
6 kW 4691 kWh 3612 kWh 1079 kWh £845 £108 £953 £21,657 22.7 yrs £-2,594
7 kW 5473 kWh 4214 kWh 1259 kWh £986 £126 £1,112 £23,692 21.3 yrs £-1,451
8 kW 6255 kWh 4816 kWh 1439 kWh £1,127 £144 £1,271 £25,726 20.2 yrs £-309

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.

Seasonal solar output in PA34

Monthly generation per kilowatt of solar panels

kWh 17 Jan 36 Feb 68 Mar 100 Apr 112 May 107 Jun 104 Jul 91 Aug 65 Sep 45 Oct 25 Nov 13 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 33.3% 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 22 kWh per month; the average month produces around 65 kWh. So a typical 4 kW home system would generate roughly 87 kWh in winter, or 261 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
23.40p/kWh
Daily Fixed Charge
58.28p/day
Local Sunshine
782kWh/kW
A 1 kW system generates ~782 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

Argyll and Bute (96%)|Highland (4%)

Areas Covered

Oban South and the Isles, Oban North and Lorn, Fort William and Ardnamurchan

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.