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Solar panel cost in Na h-Eileanan Siar (PA84)

See realistic solar installation costs, savings and payback for PA84 (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
12.4 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£656
What you save every year
Profit Over 25 Years
£8,258
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 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 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)
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: £656, Upfront: £8,139, Break-even: 12.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1583 kWh 633 kWh 950 kWh £167 £95 £262 £3,256 12.4 yrs £1,991
3 kW 2375 kWh 950 kWh 1425 kWh £251 £143 £394 £4,883 12.4 yrs £2,987
4 kW 3167 kWh 1267 kWh 1900 kWh £335 £190 £525 £6,511 12.4 yrs £3,983
5 kW 3959 kWh 1583 kWh 2375 kWh £418 £238 £656 £8,139 12.4 yrs £4,978
6 kW 4750 kWh 1900 kWh 2850 kWh £502 £285 £787 £9,767 12.4 yrs £5,974
7 kW 5542 kWh 2217 kWh 3325 kWh £586 £333 £918 £11,394 12.4 yrs £6,970
8 kW 6334 kWh 2533 kWh 3800 kWh £669 £380 £1,049 £13,022 12.4 yrs £7,965

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: £786, Upfront: £10,239, Break-even: 13.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1583 kWh 950 kWh 633 kWh £251 £63 £314 £5,356 17.0 yrs £931
3 kW 2375 kWh 1425 kWh 950 kWh £377 £95 £472 £6,983 14.8 yrs £2,447
4 kW 3167 kWh 1900 kWh 1267 kWh £502 £127 £629 £8,611 13.7 yrs £3,963
5 kW 3959 kWh 2375 kWh 1583 kWh £628 £158 £786 £10,239 13.0 yrs £5,478
6 kW 4750 kWh 2850 kWh 1900 kWh £753 £190 £943 £11,867 12.6 yrs £6,994
7 kW 5542 kWh 3325 kWh 2217 kWh £879 £222 £1,100 £13,494 12.3 yrs £8,510
8 kW 6334 kWh 3800 kWh 2533 kWh £1,004 £253 £1,257 £15,122 12.0 yrs £10,025

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: £851, Upfront: £11,639, Break-even: 13.7 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 £293 £48 £340 £6,756 19.8 yrs £51
3 kW 2375 kWh 1663 kWh 713 kWh £439 £71 £511 £8,383 16.4 yrs £1,827
4 kW 3167 kWh 2217 kWh 950 kWh £586 £95 £681 £10,011 14.7 yrs £3,603
5 kW 3959 kWh 2771 kWh 1188 kWh £732 £119 £851 £11,639 13.7 yrs £5,378
6 kW 4750 kWh 3325 kWh 1425 kWh £879 £143 £1,021 £13,267 13.0 yrs £7,154
7 kW 5542 kWh 3879 kWh 1663 kWh £1,025 £166 £1,191 £14,894 12.5 yrs £8,930
8 kW 6334 kWh 4434 kWh 1900 kWh £1,171 £190 £1,361 £16,522 12.1 yrs £10,705

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: £870, Upfront: £13,389, 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 1583 kWh 1156 kWh 428 kWh £305 £43 £348 £8,506 24.4 yrs £-1,543
3 kW 2375 kWh 1734 kWh 641 kWh £458 £64 £522 £10,133 19.4 yrs £311
4 kW 3167 kWh 2312 kWh 855 kWh £611 £86 £696 £11,761 16.9 yrs £2,165
5 kW 3959 kWh 2890 kWh 1069 kWh £763 £107 £870 £13,389 15.4 yrs £4,018
6 kW 4750 kWh 3468 kWh 1283 kWh £916 £128 £1,044 £15,017 14.4 yrs £5,872
7 kW 5542 kWh 4046 kWh 1496 kWh £1,069 £150 £1,218 £16,644 13.7 yrs £7,725
8 kW 6334 kWh 4624 kWh 1710 kWh £1,222 £171 £1,393 £18,272 13.1 yrs £9,579

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: £883, Upfront: £15,139, Break-even: 17.1 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 £314 £40 £353 £10,256 29.0 yrs £-3,189
3 kW 2375 kWh 1781 kWh 594 kWh £471 £59 £530 £11,883 22.4 yrs £-1,283
4 kW 3167 kWh 2375 kWh 792 kWh £628 £79 £707 £13,511 19.1 yrs £623
5 kW 3959 kWh 2969 kWh 990 kWh £784 £99 £883 £15,139 17.1 yrs £2,528
6 kW 4750 kWh 3563 kWh 1188 kWh £941 £119 £1,060 £16,767 15.8 yrs £4,434
7 kW 5542 kWh 4156 kWh 1385 kWh £1,098 £139 £1,237 £18,394 14.9 yrs £6,339
8 kW 6334 kWh 4750 kWh 1583 kWh £1,255 £158 £1,413 £20,022 14.2 yrs £8,245

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: £896, Upfront: £17,589, Break-even: 19.6 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 £322 £36 £359 £12,706 35.4 yrs £-5,535
3 kW 2375 kWh 1829 kWh 546 kWh £483 £55 £538 £14,333 26.7 yrs £-3,577
4 kW 3167 kWh 2438 kWh 728 kWh £644 £73 £717 £15,961 22.3 yrs £-1,619
5 kW 3959 kWh 3048 kWh 910 kWh £805 £91 £896 £17,589 19.6 yrs £338
6 kW 4750 kWh 3658 kWh 1093 kWh £966 £109 £1,076 £19,217 17.9 yrs £2,296
7 kW 5542 kWh 4267 kWh 1275 kWh £1,127 £127 £1,255 £20,844 16.6 yrs £4,253
8 kW 6334 kWh 4877 kWh 1457 kWh £1,288 £146 £1,434 £22,472 15.7 yrs £6,211

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 PA84

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

Solar Payback Index Rank #2903 of 2996
13.9 years (UK avg 10.8 years)
~£525 /yr • £7,307 upfront
Standing-Charge Drag Rank #2853 of 2996
40.0% (UK avg 26.6%) drag on savings
£210 fixed • ~£525 /yr value
Aspect Penalty View ranking →
East −19.8% West −21.7%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in PA84

Monthly generation per kilowatt of solar panels

kWh 16 Jan 33 Feb 69 Mar 102 Apr 118 May 114 Jun 105 Jul 92 Aug 66 Sep 43 Oct 22 Nov 11 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 30.5% 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 66 kWh. So a typical 4 kW home system would generate roughly 80 kWh in winter, or 264 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.42p/kWh
Daily Fixed Charge
57.55p/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, 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

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