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Solar panel cost in Na h-Eileanan Siar (HS5)

See realistic solar installation costs, savings and payback for HS5 (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
12.1 years
After this, it's pure profit
Upfront Cost
£8,139
What you pay to get started
Annual Benefit
£672
What you save every year
Profit Over 25 Years
£8,673
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 812 kWh/kW — 3 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 812 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)
812 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: £672, Upfront: £8,139, Break-even: 12.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1624 kWh 649 kWh 974 kWh £172 £97 £269 £3,256 12.1 yrs £2,124
3 kW 2435 kWh 974 kWh 1461 kWh £257 £146 £403 £4,883 12.1 yrs £3,186
4 kW 3247 kWh 1299 kWh 1948 kWh £343 £195 £538 £6,511 12.1 yrs £4,248
5 kW 4059 kWh 1624 kWh 2435 kWh £429 £244 £672 £8,139 12.1 yrs £5,310
6 kW 4870 kWh 1948 kWh 2922 kWh £515 £292 £807 £9,767 12.1 yrs £6,372
7 kW 5682 kWh 2273 kWh 3409 kWh £601 £341 £941 £11,394 12.1 yrs £7,434
8 kW 6494 kWh 2598 kWh 3896 kWh £686 £390 £1,076 £13,022 12.1 yrs £8,496

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: £806, Upfront: £10,239, Break-even: 12.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1624 kWh 974 kWh 649 kWh £257 £65 £322 £5,356 16.6 yrs £1,090
3 kW 2435 kWh 1461 kWh 974 kWh £386 £97 £483 £6,983 14.4 yrs £2,686
4 kW 3247 kWh 1948 kWh 1299 kWh £515 £130 £645 £8,611 13.4 yrs £4,281
5 kW 4059 kWh 2435 kWh 1624 kWh £643 £162 £806 £10,239 12.7 yrs £5,876
6 kW 4870 kWh 2922 kWh 1948 kWh £772 £195 £967 £11,867 12.3 yrs £7,471
7 kW 5682 kWh 3409 kWh 2273 kWh £901 £227 £1,128 £13,494 12.0 yrs £9,066
8 kW 6494 kWh 3896 kWh 2598 kWh £1,029 £260 £1,289 £15,122 11.7 yrs £10,662

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: £872, Upfront: £11,639, Break-even: 13.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1624 kWh 1136 kWh 487 kWh £300 £49 £349 £6,756 19.4 yrs £224
3 kW 2435 kWh 1705 kWh 731 kWh £450 £73 £523 £8,383 16.0 yrs £2,085
4 kW 3247 kWh 2273 kWh 974 kWh £601 £97 £698 £10,011 14.3 yrs £3,947
5 kW 4059 kWh 2841 kWh 1218 kWh £751 £122 £872 £11,639 13.3 yrs £5,809
6 kW 4870 kWh 3409 kWh 1461 kWh £901 £146 £1,047 £13,267 12.7 yrs £7,671
7 kW 5682 kWh 3978 kWh 1705 kWh £1,051 £170 £1,221 £14,894 12.2 yrs £9,533
8 kW 6494 kWh 4546 kWh 1948 kWh £1,201 £195 £1,396 £16,522 11.8 yrs £11,394

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: £892, Upfront: £13,389, Break-even: 15.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1624 kWh 1185 kWh 438 kWh £313 £44 £357 £8,506 23.8 yrs £-1,366
3 kW 2435 kWh 1778 kWh 658 kWh £470 £66 £535 £10,133 18.9 yrs £575
4 kW 3247 kWh 2370 kWh 877 kWh £626 £88 £714 £11,761 16.5 yrs £2,517
5 kW 4059 kWh 2963 kWh 1096 kWh £783 £110 £892 £13,389 15.0 yrs £4,459
6 kW 4870 kWh 3555 kWh 1315 kWh £939 £132 £1,071 £15,017 14.0 yrs £6,401
7 kW 5682 kWh 4148 kWh 1534 kWh £1,096 £153 £1,249 £16,644 13.3 yrs £8,342
8 kW 6494 kWh 4741 kWh 1753 kWh £1,252 £175 £1,428 £18,272 12.8 yrs £10,284

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: £906, Upfront: £15,139, Break-even: 16.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1624 kWh 1218 kWh 406 kWh £322 £41 £362 £10,256 28.3 yrs £-3,010
3 kW 2435 kWh 1826 kWh 609 kWh £483 £61 £543 £11,883 21.9 yrs £-1,015
4 kW 3247 kWh 2435 kWh 812 kWh £643 £81 £725 £13,511 18.6 yrs £980
5 kW 4059 kWh 3044 kWh 1015 kWh £804 £101 £906 £15,139 16.7 yrs £2,975
6 kW 4870 kWh 3653 kWh 1218 kWh £965 £122 £1,087 £16,767 15.4 yrs £4,970
7 kW 5682 kWh 4262 kWh 1421 kWh £1,126 £142 £1,268 £18,394 14.5 yrs £6,966
8 kW 6494 kWh 4870 kWh 1624 kWh £1,287 £162 £1,449 £20,022 13.8 yrs £8,961

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: £919, Upfront: £17,589, Break-even: 19.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1624 kWh 1250 kWh 373 kWh £330 £37 £368 £12,706 34.6 yrs £-5,353
3 kW 2435 kWh 1875 kWh 560 kWh £495 £56 £551 £14,333 26.0 yrs £-3,305
4 kW 3247 kWh 2500 kWh 747 kWh £661 £75 £735 £15,961 21.7 yrs £-1,256
5 kW 4059 kWh 3125 kWh 934 kWh £826 £93 £919 £17,589 19.1 yrs £792
6 kW 4870 kWh 3750 kWh 1120 kWh £991 £112 £1,103 £19,217 17.4 yrs £2,840
7 kW 5682 kWh 4375 kWh 1307 kWh £1,156 £131 £1,287 £20,844 16.2 yrs £4,889
8 kW 6494 kWh 5000 kWh 1494 kWh £1,321 £149 £1,470 £22,472 15.3 yrs £6,937

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 HS5

Figures below are tailored to HS5 — click through for full league tables.

Solar Payback Index Rank #2877 of 2996
13.6 years (UK avg 10.8 years)
~£538 /yr • £7,307 upfront
Standing-Charge Drag Rank #2784 of 2996
39.0% (UK avg 26.6%) drag on savings
£210 fixed • ~£538 /yr value
Aspect Penalty View ranking →
East −19.5% West −22.1%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in HS5

Monthly generation per kilowatt of solar panels

kWh 16 Jan 34 Feb 72 Mar 105 Apr 122 May 116 Jun 107 Jul 94 Aug 67 Sep 45 Oct 23 Nov 12 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 30.2% 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 68 kWh. So a typical 4 kW home system would generate roughly 82 kWh in winter, or 271 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.42p/kWh
Daily Fixed Charge
57.55p/day
Local Sunshine
812kWh/kW
A 1 kW system generates ~812 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, Steòrnabhagh a Deas

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

PA83 (Na h-Eileanan Siar)
≈0.1 km away
Local sunshine: ~809 kWh/kWp · -0% vs HS5
HS3 (Na h-Eileanan Siar)
≈17.6 km away
Local sunshine: ~719 kWh/kWp · -11% vs HS5
PA85 (Na h-Eileanan Siar)
≈17.7 km away
Local sunshine: ~719 kWh/kWp · -11% vs HS5
PA84 (Na h-Eileanan Siar)
≈22.1 km away
Local sunshine: ~792 kWh/kWp · -2% vs HS5
HS4 (Na h-Eileanan Siar)
≈22.1 km away
Local sunshine: ~791 kWh/kWp · -3% vs HS5
HS6 (Na h-Eileanan Siar)
≈24.4 km away
Local sunshine: ~818 kWh/kWp · +1% vs HS5

Similar sunshine across the UK

ML6 (North Lanarkshire)
~811 kWh/kWp · -0% vs HS5
LL48 (Gwynedd)
~812 kWh/kWp · +0% vs HS5
CA13 (Cumberland)
~812 kWh/kWp · +0% vs HS5