Solar explained to clever people by people who are not trying to be clever

Solar Panels in PA75 (Argyll and Bute)

See if solar pays off for you in Argyll and Bute — price, savings and payback in under a minute (official UK data).

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
15.6 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£651
What you save every year
Profit Over 25 Years
£6,107
After paying itself off, you're this much ahead

Ready to Get Started?

Get your free quote from Blue Ape Renewables. They'll connect you with MCS-certified installers in your area and handle all the paperwork.

Get Solar Quote →
4.8★ Trustpilot • Octopus Energy trusted partner • MCS certified • No obligation
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 774 kWh per year on a south-facing roof. We value self-used electricity at 27.1p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
27.1p/kWh
Standing charge
61.0p/day
Sunshine yield (south)
774 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: £651, Upfront: £10,173, Break-even: 15.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1548 kWh 619 kWh 929 kWh £168 £93 £260 £4,069 15.6 yrs £1,141
3 kW 2322 kWh 929 kWh 1393 kWh £251 £139 £391 £6,104 15.6 yrs £1,711
4 kW 3097 kWh 1239 kWh 1858 kWh £335 £186 £521 £8,138 15.6 yrs £2,281
5 kW 3871 kWh 1548 kWh 2322 kWh £419 £232 £651 £10,173 15.6 yrs £2,851
6 kW 4645 kWh 1858 kWh 2787 kWh £503 £279 £781 £12,207 15.6 yrs £3,422
7 kW 5419 kWh 2168 kWh 3251 kWh £587 £325 £912 £14,242 15.6 yrs £3,992
8 kW 6193 kWh 2477 kWh 3716 kWh £670 £372 £1,042 £16,276 15.6 yrs £4,562

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: £783, Upfront: £12,273, Break-even: 15.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1548 kWh 929 kWh 619 kWh £251 £62 £313 £6,169 19.7 yrs £97
3 kW 2322 kWh 1393 kWh 929 kWh £377 £93 £470 £8,204 17.5 yrs £1,196
4 kW 3097 kWh 1858 kWh 1239 kWh £503 £124 £627 £10,238 16.3 yrs £2,294
5 kW 3871 kWh 2322 kWh 1548 kWh £628 £155 £783 £12,273 15.7 yrs £3,393
6 kW 4645 kWh 2787 kWh 1858 kWh £754 £186 £940 £14,307 15.2 yrs £4,491
7 kW 5419 kWh 3251 kWh 2168 kWh £880 £217 £1,097 £16,342 14.9 yrs £5,590
8 kW 6193 kWh 3716 kWh 2477 kWh £1,006 £248 £1,253 £18,376 14.7 yrs £6,688

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: £849, 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 1548 kWh 1084 kWh 464 kWh £293 £46 £340 £7,569 22.3 yrs £-775
3 kW 2322 kWh 1626 kWh 697 kWh £440 £70 £510 £9,604 18.8 yrs £588
4 kW 3097 kWh 2168 kWh 929 kWh £587 £93 £679 £11,638 17.1 yrs £1,951
5 kW 3871 kWh 2709 kWh 1161 kWh £733 £116 £849 £13,673 16.1 yrs £3,313
6 kW 4645 kWh 3251 kWh 1393 kWh £880 £139 £1,019 £15,707 15.4 yrs £4,676
7 kW 5419 kWh 3793 kWh 1626 kWh £1,026 £163 £1,189 £17,742 14.9 yrs £6,039
8 kW 6193 kWh 4335 kWh 1858 kWh £1,173 £186 £1,359 £19,776 14.6 yrs £7,401

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 1548 kWh 1130 kWh 418 kWh £306 £42 £348 £9,319 26.8 yrs £-2,366
3 kW 2322 kWh 1695 kWh 627 kWh £459 £63 £521 £11,354 21.8 yrs £-924
4 kW 3097 kWh 2260 kWh 836 kWh £612 £84 £695 £13,388 19.3 yrs £518
5 kW 3871 kWh 2826 kWh 1045 kWh £765 £105 £869 £15,423 17.7 yrs £1,960
6 kW 4645 kWh 3391 kWh 1254 kWh £918 £125 £1,043 £17,457 16.7 yrs £3,402
7 kW 5419 kWh 3956 kWh 1463 kWh £1,070 £146 £1,217 £19,492 16.0 yrs £4,843
8 kW 6193 kWh 4521 kWh 1672 kWh £1,223 £167 £1,391 £21,526 15.5 yrs £6,285

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: £882, 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 1548 kWh 1161 kWh 387 kWh £314 £39 £353 £11,069 31.4 yrs £-4,011
3 kW 2322 kWh 1742 kWh 581 kWh £471 £58 £529 £13,104 24.8 yrs £-2,516
4 kW 3097 kWh 2322 kWh 774 kWh £628 £77 £706 £15,138 21.4 yrs £-1,021
5 kW 3871 kWh 2903 kWh 968 kWh £786 £97 £882 £17,173 19.5 yrs £474
6 kW 4645 kWh 3484 kWh 1161 kWh £943 £116 £1,059 £19,207 18.1 yrs £1,968
7 kW 5419 kWh 4064 kWh 1355 kWh £1,100 £135 £1,235 £21,242 17.2 yrs £3,463
8 kW 6193 kWh 4645 kWh 1548 kWh £1,257 £155 £1,412 £23,276 16.5 yrs £4,958

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: £896, Upfront: £19,623, 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 1548 kWh 1192 kWh 356 kWh £323 £36 £358 £13,519 37.7 yrs £-6,355
3 kW 2322 kWh 1788 kWh 534 kWh £484 £53 £537 £15,554 28.9 yrs £-4,807
4 kW 3097 kWh 2384 kWh 712 kWh £645 £71 £716 £17,588 24.6 yrs £-3,260
5 kW 3871 kWh 2980 kWh 890 kWh £806 £89 £896 £19,623 21.9 yrs £-1,712
6 kW 4645 kWh 3576 kWh 1068 kWh £968 £107 £1,075 £21,657 20.2 yrs £-165
7 kW 5419 kWh 4173 kWh 1246 kWh £1,129 £125 £1,254 £23,692 18.9 yrs £1,383
8 kW 6193 kWh 4769 kWh 1424 kWh £1,290 £142 £1,433 £25,726 18.0 yrs £2,931

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.

Your Area at a Glance

Your Electricity Rate
27.06p/kWh
Daily Fixed Charge
61.00p/day
Local Sunshine
774kWh/kW
A 1 kW system generates ~774 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 (100%)

Areas Covered

Oban South and the Isles

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q4 2025

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.