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Solar Panels in PA84 (Na h-Eileanan Siar)

See if solar pays off for you in Na h-Eileanan Siar — 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
15.3 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£666
What you save every year
Profit Over 25 Years
£6,477
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 27.06p/kWh with a 61.00p/day standing charge. Your postcode’s south-facing sunshine yield is 792 kWh/kW — 23 below 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 792 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)
792 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: £666, Upfront: £10,173, Break-even: 15.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1583 kWh 633 kWh 950 kWh £171 £95 £266 £4,069 15.3 yrs £1,259
3 kW 2375 kWh 950 kWh 1425 kWh £257 £143 £400 £6,104 15.3 yrs £1,888
4 kW 3167 kWh 1267 kWh 1900 kWh £343 £190 £533 £8,138 15.3 yrs £2,518
5 kW 3959 kWh 1583 kWh 2375 kWh £428 £238 £666 £10,173 15.3 yrs £3,147
6 kW 4750 kWh 1900 kWh 2850 kWh £514 £285 £799 £12,207 15.3 yrs £3,777
7 kW 5542 kWh 2217 kWh 3325 kWh £600 £333 £932 £14,242 15.3 yrs £4,406
8 kW 6334 kWh 2533 kWh 3800 kWh £686 £380 £1,066 £16,276 15.3 yrs £5,035

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: £801, Upfront: £12,273, Break-even: 15.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1583 kWh 950 kWh 633 kWh £257 £63 £320 £6,169 19.3 yrs £239
3 kW 2375 kWh 1425 kWh 950 kWh £386 £95 £481 £8,204 17.1 yrs £1,409
4 kW 3167 kWh 1900 kWh 1267 kWh £514 £127 £641 £10,238 16.0 yrs £2,579
5 kW 3959 kWh 2375 kWh 1583 kWh £643 £158 £801 £12,273 15.3 yrs £3,748
6 kW 4750 kWh 2850 kWh 1900 kWh £771 £190 £961 £14,307 14.9 yrs £4,918
7 kW 5542 kWh 3325 kWh 2217 kWh £900 £222 £1,121 £16,342 14.6 yrs £6,088
8 kW 6334 kWh 3800 kWh 2533 kWh £1,028 £253 £1,282 £18,376 14.3 yrs £7,258

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: £869, Upfront: £13,673, 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 1583 kWh 1108 kWh 475 kWh £300 £48 £347 £7,569 21.8 yrs £-620
3 kW 2375 kWh 1663 kWh 713 kWh £450 £71 £521 £9,604 18.4 yrs £819
4 kW 3167 kWh 2217 kWh 950 kWh £600 £95 £695 £11,638 16.7 yrs £2,259
5 kW 3959 kWh 2771 kWh 1188 kWh £750 £119 £869 £13,673 15.7 yrs £3,699
6 kW 4750 kWh 3325 kWh 1425 kWh £900 £143 £1,042 £15,707 15.1 yrs £5,139
7 kW 5542 kWh 3879 kWh 1663 kWh £1,050 £166 £1,216 £17,742 14.6 yrs £6,579
8 kW 6334 kWh 4434 kWh 1900 kWh £1,200 £190 £1,390 £19,776 14.2 yrs £8,019

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: £889, Upfront: £15,423, 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 1583 kWh 1156 kWh 428 kWh £313 £43 £356 £9,319 26.2 yrs £-2,208
3 kW 2375 kWh 1734 kWh 641 kWh £469 £64 £533 £11,354 21.3 yrs £-687
4 kW 3167 kWh 2312 kWh 855 kWh £626 £86 £711 £13,388 18.8 yrs £833
5 kW 3959 kWh 2890 kWh 1069 kWh £782 £107 £889 £15,423 17.4 yrs £2,354
6 kW 4750 kWh 3468 kWh 1283 kWh £938 £128 £1,067 £17,457 16.4 yrs £3,875
7 kW 5542 kWh 4046 kWh 1496 kWh £1,095 £150 £1,244 £19,492 15.7 yrs £5,396
8 kW 6334 kWh 4624 kWh 1710 kWh £1,251 £171 £1,422 £21,526 15.1 yrs £6,917

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: £902, Upfront: £17,173, 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 1583 kWh 1188 kWh 396 kWh £321 £40 £361 £11,069 30.7 yrs £-3,850
3 kW 2375 kWh 1781 kWh 594 kWh £482 £59 £541 £13,104 24.2 yrs £-2,275
4 kW 3167 kWh 2375 kWh 792 kWh £643 £79 £722 £15,138 21.0 yrs £-700
5 kW 3959 kWh 2969 kWh 990 kWh £803 £99 £902 £17,173 19.0 yrs £874
6 kW 4750 kWh 3563 kWh 1188 kWh £964 £119 £1,083 £19,207 17.7 yrs £2,449
7 kW 5542 kWh 4156 kWh 1385 kWh £1,125 £139 £1,263 £21,242 16.8 yrs £4,024
8 kW 6334 kWh 4750 kWh 1583 kWh £1,285 £158 £1,444 £23,276 16.1 yrs £5,599

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: £916, Upfront: £19,623, Break-even: 21.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1583 kWh 1219 kWh 364 kWh £330 £36 £366 £13,519 36.9 yrs £-6,192
3 kW 2375 kWh 1829 kWh 546 kWh £495 £55 £550 £15,554 28.3 yrs £-4,563
4 kW 3167 kWh 2438 kWh 728 kWh £660 £73 £733 £17,588 24.0 yrs £-2,934
5 kW 3959 kWh 3048 kWh 910 kWh £825 £91 £916 £19,623 21.4 yrs £-1,305
6 kW 4750 kWh 3658 kWh 1093 kWh £990 £109 £1,099 £21,657 19.7 yrs £324
7 kW 5542 kWh 4267 kWh 1275 kWh £1,155 £127 £1,282 £23,692 18.5 yrs £1,952
8 kW 6334 kWh 4877 kWh 1457 kWh £1,320 £146 £1,465 £25,726 17.6 yrs £3,581

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 PA84

Figures below are tailored to PA84 — click through for full league tables.

Solar Payback Index Rank #2895 of 2997
13.3 years (UK avg 11.3 years)
~£614 /yr • £8,138 upfront
Standing-Charge Drag Rank #2901 of 2997
36.3% (UK avg 21.7%) drag on savings
£223 fixed • ~£614 /yr value

Your Area at a Glance

Your Electricity Rate
27.06p/kWh
Daily Fixed Charge
61.00p/day
Local Sunshine
792kWh/kW
A 1 kW system generates ~792 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

Na h-Eileanan Siar (100%)

Areas Covered

Na Hearadh

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.

Compare nearby areas

Nearby in Northern Scotland

HS4 (Na h-Eileanan Siar)
≈0.1 km away
Local sunshine: ~791 kWh/kWp · -0% vs PA84
PA85 (Na h-Eileanan Siar)
≈7.4 km away
Local sunshine: ~719 kWh/kWp · -9% vs PA84
HS3 (Na h-Eileanan Siar)
≈7.6 km away
Local sunshine: ~719 kWh/kWp · -9% vs PA84
PA83 (Na h-Eileanan Siar)
≈22.0 km away
Local sunshine: ~809 kWh/kWp · +2% vs PA84
HS5 (Na h-Eileanan Siar)
≈22.1 km away
Local sunshine: ~812 kWh/kWp · +3% vs PA84
HS1 (Na h-Eileanan Siar)
≈42.0 km away
Local sunshine: ~780 kWh/kWp · -1% vs PA84

Similar sunshine across the UK

LL57 (Gwynedd)
~792 kWh/kWp · -0% vs PA84
CA17 (Westmorland and Furness)
~792 kWh/kWp · +0% vs PA84
DG10 (Dumfries and Galloway)
~794 kWh/kWp · +0% vs PA84