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Solar panel cost in Na h-Eileanan Siar (PA81)

See realistic solar installation costs, savings and payback for PA81 (Na h-Eileanan Siar) 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
11.6 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£701
What you save every year
Profit Over 25 Years
£9,380
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 Northern Scotland, the current unit rate is 26.42p/kWh with a 57.55p/day standing charge. Your postcode’s south-facing sunshine yield is 846 kWh/kW — 31 above 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 846 kWh per year on a south-facing roof. We value self-used electricity at 26.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.4p/kWh
Standing charge
57.5p/day
Sunshine yield (south)
846 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: £701, Upfront: £8,139, Break-even: 11.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1692 kWh 677 kWh 1015 kWh £179 £102 £280 £3,256 11.6 yrs £2,350
3 kW 2538 kWh 1015 kWh 1523 kWh £268 £152 £420 £4,883 11.6 yrs £3,526
4 kW 3384 kWh 1353 kWh 2030 kWh £358 £203 £561 £6,511 11.6 yrs £4,701
5 kW 4229 kWh 1692 kWh 2538 kWh £447 £254 £701 £8,139 11.6 yrs £5,876
6 kW 5075 kWh 2030 kWh 3045 kWh £536 £305 £841 £9,767 11.6 yrs £7,051
7 kW 5921 kWh 2368 kWh 3553 kWh £626 £355 £981 £11,394 11.6 yrs £8,226
8 kW 6767 kWh 2707 kWh 4060 kWh £715 £406 £1,121 £13,022 11.6 yrs £9,401

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: £840, Upfront: £10,239, 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 1692 kWh 1015 kWh 677 kWh £268 £68 £336 £5,356 15.9 yrs £1,362
3 kW 2538 kWh 1523 kWh 1015 kWh £402 £102 £504 £6,983 13.9 yrs £3,092
4 kW 3384 kWh 2030 kWh 1353 kWh £536 £135 £672 £8,611 12.8 yrs £4,823
5 kW 4229 kWh 2538 kWh 1692 kWh £670 £169 £840 £10,239 12.2 yrs £6,554
6 kW 5075 kWh 3045 kWh 2030 kWh £805 £203 £1,008 £11,867 11.8 yrs £8,285
7 kW 5921 kWh 3553 kWh 2368 kWh £939 £237 £1,175 £13,494 11.5 yrs £10,015
8 kW 6767 kWh 4060 kWh 2707 kWh £1,073 £271 £1,343 £15,122 11.3 yrs £11,746

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: £909, Upfront: £11,639, Break-even: 12.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1692 kWh 1184 kWh 508 kWh £313 £51 £364 £6,756 18.6 yrs £517
3 kW 2538 kWh 1776 kWh 761 kWh £469 £76 £545 £8,383 15.4 yrs £2,526
4 kW 3384 kWh 2368 kWh 1015 kWh £626 £102 £727 £10,011 13.8 yrs £4,534
5 kW 4229 kWh 2961 kWh 1269 kWh £782 £127 £909 £11,639 12.8 yrs £6,543
6 kW 5075 kWh 3553 kWh 1523 kWh £939 £152 £1,091 £13,267 12.2 yrs £8,551
7 kW 5921 kWh 4145 kWh 1776 kWh £1,095 £178 £1,273 £14,894 11.7 yrs £10,560
8 kW 6767 kWh 4737 kWh 2030 kWh £1,252 £203 £1,455 £16,522 11.4 yrs £12,568

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: £930, Upfront: £13,389, Break-even: 14.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1692 kWh 1235 kWh 457 kWh £326 £46 £372 £8,506 22.9 yrs £-1,066
3 kW 2538 kWh 1852 kWh 685 kWh £489 £69 £558 £10,133 18.2 yrs £1,026
4 kW 3384 kWh 2470 kWh 914 kWh £653 £91 £744 £11,761 15.8 yrs £3,118
5 kW 4229 kWh 3087 kWh 1142 kWh £816 £114 £930 £13,389 14.4 yrs £5,209
6 kW 5075 kWh 3705 kWh 1370 kWh £979 £137 £1,116 £15,017 13.5 yrs £7,301
7 kW 5921 kWh 4322 kWh 1599 kWh £1,142 £160 £1,302 £16,644 12.8 yrs £9,393
8 kW 6767 kWh 4940 kWh 1827 kWh £1,305 £183 £1,488 £18,272 12.3 yrs £11,485

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: £944, Upfront: £15,139, Break-even: 16.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1692 kWh 1269 kWh 423 kWh £335 £42 £378 £10,256 27.2 yrs £-2,705
3 kW 2538 kWh 1903 kWh 634 kWh £503 £63 £566 £11,883 21.0 yrs £-558
4 kW 3384 kWh 2538 kWh 846 kWh £670 £85 £755 £13,511 17.9 yrs £1,590
5 kW 4229 kWh 3172 kWh 1057 kWh £838 £106 £944 £15,139 16.0 yrs £3,737
6 kW 5075 kWh 3807 kWh 1269 kWh £1,006 £127 £1,133 £16,767 14.8 yrs £5,885
7 kW 5921 kWh 4441 kWh 1480 kWh £1,173 £148 £1,321 £18,394 13.9 yrs £8,032
8 kW 6767 kWh 5075 kWh 1692 kWh £1,341 £169 £1,510 £20,022 13.3 yrs £10,180

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: £958, Upfront: £17,589, Break-even: 18.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1692 kWh 1303 kWh 389 kWh £344 £39 £383 £12,706 33.2 yrs £-5,044
3 kW 2538 kWh 1954 kWh 584 kWh £516 £58 £575 £14,333 24.9 yrs £-2,841
4 kW 3384 kWh 2605 kWh 778 kWh £688 £78 £766 £15,961 20.8 yrs £-638
5 kW 4229 kWh 3257 kWh 973 kWh £860 £97 £958 £17,589 18.4 yrs £1,565
6 kW 5075 kWh 3908 kWh 1167 kWh £1,032 £117 £1,149 £19,217 16.7 yrs £3,768
7 kW 5921 kWh 4559 kWh 1362 kWh £1,205 £136 £1,341 £20,844 15.5 yrs £5,971
8 kW 6767 kWh 5211 kWh 1556 kWh £1,377 £156 £1,532 £22,472 14.7 yrs £8,174

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 Na h-Eileanan Siar

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 PA81

Figures below are tailored to PA81 — click through for full league tables.

Solar Payback Index Rank #2804 of 2996
13.0 years (UK avg 10.8 years)
~£561 /yr • £7,307 upfront
Standing-Charge Drag Rank #2714 of 2996
37.4% (UK avg 26.6%) drag on savings
£210 fixed • ~£561 /yr value
Aspect Penalty View ranking →
East −19.2% West −22.7%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in PA81

Monthly generation per kilowatt of solar panels

kWh 16 Jan 34 Feb 74 Mar 111 Apr 128 May 120 Jun 113 Jul 100 Aug 70 Sep 47 Oct 22 Nov 11 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 29.0% 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 20 kWh per month; the average month produces around 70 kWh. So a typical 4 kW home system would generate roughly 82 kWh in winter, or 282 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.42p/kWh
Daily Fixed Charge
57.55p/day
Local Sunshine
846kWh/kW
A 1 kW system generates ~846 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

Uibhist a Deas, Èirisgeigh agus Beinn na Faoghla

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 Northern Scotland

HS8 (Na h-Eileanan Siar)
≈0.0 km away
Local sunshine: ~861 kWh/kWp · +2% vs PA81
HS7 (Na h-Eileanan Siar)
≈28.0 km away
Local sunshine: ~861 kWh/kWp · +2% vs PA81
PA88 (Na h-Eileanan Siar)
≈28.3 km away
Local sunshine: ~861 kWh/kWp · +2% vs PA81
HS9 (Na h-Eileanan Siar)
≈28.9 km away
Local sunshine: ~857 kWh/kWp · +1% vs PA81
PA80 (Na h-Eileanan Siar)
≈30.0 km away
Local sunshine: ~789 kWh/kWp · -7% vs PA81
PA82 (Na h-Eileanan Siar)
≈43.3 km away
Local sunshine: ~818 kWh/kWp · -3% vs PA81

Similar sunshine across the UK

BT49 (Causeway Coast and Glens)
~846 kWh/kWp · -0% vs PA81
M24 (Rochdale)
~846 kWh/kWp · +0% vs PA81
LL38 (Gwynedd)
~846 kWh/kWp · -0% vs PA81