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Solar panel cost in Na h-Eileanan Siar (PA87)

See realistic solar installation costs, savings and payback for PA87 (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
12.6 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£646
What you save every year
Profit Over 25 Years
£8,012
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 780 kWh/kW — 35 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 780 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)
780 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: £646, Upfront: £8,139, Break-even: 12.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1560 kWh 624 kWh 936 kWh £165 £94 £258 £3,256 12.6 yrs £1,913
3 kW 2340 kWh 936 kWh 1404 kWh £247 £140 £388 £4,883 12.6 yrs £2,869
4 kW 3119 kWh 1248 kWh 1872 kWh £330 £187 £517 £6,511 12.6 yrs £3,826
5 kW 3899 kWh 1560 kWh 2340 kWh £412 £234 £646 £8,139 12.6 yrs £4,782
6 kW 4679 kWh 1872 kWh 2807 kWh £494 £281 £775 £9,767 12.6 yrs £5,738
7 kW 5459 kWh 2184 kWh 3275 kWh £577 £328 £904 £11,394 12.6 yrs £6,695
8 kW 6239 kWh 2496 kWh 3743 kWh £659 £374 £1,034 £13,022 12.6 yrs £7,651

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: £774, Upfront: £10,239, Break-even: 13.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1560 kWh 936 kWh 624 kWh £247 £62 £310 £5,356 17.3 yrs £837
3 kW 2340 kWh 1404 kWh 936 kWh £371 £94 £464 £6,983 15.0 yrs £2,306
4 kW 3119 kWh 1872 kWh 1248 kWh £494 £125 £619 £8,611 13.9 yrs £3,774
5 kW 3899 kWh 2340 kWh 1560 kWh £618 £156 £774 £10,239 13.2 yrs £5,243
6 kW 4679 kWh 2807 kWh 1872 kWh £742 £187 £929 £11,867 12.8 yrs £6,712
7 kW 5459 kWh 3275 kWh 2184 kWh £865 £218 £1,084 £13,494 12.5 yrs £8,180
8 kW 6239 kWh 3743 kWh 2496 kWh £989 £250 £1,239 £15,122 12.2 yrs £9,649

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: £838, Upfront: £11,639, Break-even: 13.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1560 kWh 1092 kWh 468 kWh £288 £47 £335 £6,756 20.2 yrs £-51
3 kW 2340 kWh 1638 kWh 702 kWh £433 £70 £503 £8,383 16.7 yrs £1,674
4 kW 3119 kWh 2184 kWh 936 kWh £577 £94 £670 £10,011 14.9 yrs £3,399
5 kW 3899 kWh 2730 kWh 1170 kWh £721 £117 £838 £11,639 13.9 yrs £5,124
6 kW 4679 kWh 3275 kWh 1404 kWh £865 £140 £1,006 £13,267 13.2 yrs £6,848
7 kW 5459 kWh 3821 kWh 1638 kWh £1,010 £164 £1,173 £14,894 12.7 yrs £8,573
8 kW 6239 kWh 4367 kWh 1872 kWh £1,154 £187 £1,341 £16,522 12.3 yrs £10,298

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: £857, Upfront: £13,389, 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 1560 kWh 1139 kWh 421 kWh £301 £42 £343 £8,506 24.8 yrs £-1,647
3 kW 2340 kWh 1708 kWh 632 kWh £451 £63 £514 £10,133 19.7 yrs £155
4 kW 3119 kWh 2277 kWh 842 kWh £602 £84 £686 £11,761 17.1 yrs £1,956
5 kW 3899 kWh 2846 kWh 1053 kWh £752 £105 £857 £13,389 15.6 yrs £3,758
6 kW 4679 kWh 3416 kWh 1263 kWh £902 £126 £1,029 £15,017 14.6 yrs £5,559
7 kW 5459 kWh 3985 kWh 1474 kWh £1,053 £147 £1,200 £16,644 13.9 yrs £7,361
8 kW 6239 kWh 4554 kWh 1684 kWh £1,203 £168 £1,372 £18,272 13.3 yrs £9,162

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: £870, Upfront: £15,139, 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 1560 kWh 1170 kWh 390 kWh £309 £39 £348 £10,256 29.5 yrs £-3,294
3 kW 2340 kWh 1755 kWh 585 kWh £464 £58 £522 £11,883 22.8 yrs £-1,442
4 kW 3119 kWh 2340 kWh 780 kWh £618 £78 £696 £13,511 19.4 yrs £411
5 kW 3899 kWh 2924 kWh 975 kWh £773 £97 £870 £15,139 17.4 yrs £2,264
6 kW 4679 kWh 3509 kWh 1170 kWh £927 £117 £1,044 £16,767 16.1 yrs £4,117
7 kW 5459 kWh 4094 kWh 1365 kWh £1,082 £136 £1,218 £18,394 15.1 yrs £5,969
8 kW 6239 kWh 4679 kWh 1560 kWh £1,236 £156 £1,392 £20,022 14.4 yrs £7,822

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: £883, Upfront: £17,589, 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 1560 kWh 1201 kWh 359 kWh £317 £36 £353 £12,706 36.0 yrs £-5,642
3 kW 2340 kWh 1801 kWh 538 kWh £476 £54 £530 £14,333 27.1 yrs £-3,738
4 kW 3119 kWh 2402 kWh 717 kWh £635 £72 £706 £15,961 22.6 yrs £-1,834
5 kW 3899 kWh 3002 kWh 897 kWh £793 £90 £883 £17,589 19.9 yrs £70
6 kW 4679 kWh 3603 kWh 1076 kWh £952 £108 £1,060 £19,217 18.1 yrs £1,974
7 kW 5459 kWh 4203 kWh 1256 kWh £1,111 £126 £1,236 £20,844 16.9 yrs £3,878
8 kW 6239 kWh 4804 kWh 1435 kWh £1,269 £143 £1,413 £22,472 15.9 yrs £5,782

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 PA87

Figures below are tailored to PA87 — click through for full league tables.

Solar Payback Index Rank #2924 of 2996
14.1 years (UK avg 10.8 years)
~£517 /yr • £7,307 upfront
Standing-Charge Drag Rank #2903 of 2996
40.6% (UK avg 26.6%) drag on savings
£210 fixed • ~£517 /yr value
Aspect Penalty View ranking →
East −19.6% West −20.9%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in PA87

Monthly generation per kilowatt of solar panels

kWh 17 Jan 34 Feb 68 Mar 100 Apr 115 May 112 Jun 102 Jul 88 Aug 65 Sep 45 Oct 22 Nov 12 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 32.1% 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 21 kWh per month; the average month produces around 65 kWh. So a typical 4 kW home system would generate roughly 83 kWh in winter, or 260 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.42p/kWh
Daily Fixed Charge
57.55p/day
Local Sunshine
780kWh/kW
A 1 kW system generates ~780 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

Steòrnabhagh a Deas, Steòrnabhagh a Tuath, Inverness Central

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

HS1 (Na h-Eileanan Siar)
≈0.3 km away
Local sunshine: ~780 kWh/kWp · +0% vs PA87
HS2 (Na h-Eileanan Siar)
≈1.9 km away
Local sunshine: ~782 kWh/kWp · +0% vs PA87
PA86 (Na h-Eileanan Siar)
≈2.0 km away
Local sunshine: ~782 kWh/kWp · +0% vs PA87
PA84 (Na h-Eileanan Siar)
≈42.2 km away
Local sunshine: ~792 kWh/kWp · +2% vs PA87
HS4 (Na h-Eileanan Siar)
≈42.2 km away
Local sunshine: ~791 kWh/kWp · +1% vs PA87
PA85 (Na h-Eileanan Siar)
≈44.3 km away
Local sunshine: ~719 kWh/kWp · -8% vs PA87

Similar sunshine across the UK

LL27 (Conwy)
~777 kWh/kWp · -0% vs PA87
LL21 (Denbighshire)
~785 kWh/kWp · +1% vs PA87
CA8 (Cumberland)
~786 kWh/kWp · +1% vs PA87