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Solar Panels in HS4 (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
£6,467
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 791 kWh/kW — 24 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 791 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)
791 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 1582 kWh 633 kWh 949 kWh £171 £95 £266 £4,069 15.3 yrs £1,256
3 kW 2374 kWh 949 kWh 1424 kWh £257 £142 £399 £6,104 15.3 yrs £1,884
4 kW 3165 kWh 1266 kWh 1899 kWh £343 £190 £532 £8,138 15.3 yrs £2,511
5 kW 3956 kWh 1582 kWh 2374 kWh £428 £237 £666 £10,173 15.3 yrs £3,139
6 kW 4747 kWh 1899 kWh 2848 kWh £514 £285 £799 £12,207 15.3 yrs £3,767
7 kW 5539 kWh 2215 kWh 3323 kWh £600 £332 £932 £14,242 15.3 yrs £4,395
8 kW 6330 kWh 2532 kWh 3798 kWh £685 £380 £1,065 £16,276 15.3 yrs £5,023

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 1582 kWh 949 kWh 633 kWh £257 £63 £320 £6,169 19.3 yrs £236
3 kW 2374 kWh 1424 kWh 949 kWh £385 £95 £480 £8,204 17.1 yrs £1,403
4 kW 3165 kWh 1899 kWh 1266 kWh £514 £127 £640 £10,238 16.0 yrs £2,571
5 kW 3956 kWh 2374 kWh 1582 kWh £642 £158 £801 £12,273 15.3 yrs £3,739
6 kW 4747 kWh 2848 kWh 1899 kWh £771 £190 £961 £14,307 14.9 yrs £4,907
7 kW 5539 kWh 3323 kWh 2215 kWh £899 £222 £1,121 £16,342 14.6 yrs £6,075
8 kW 6330 kWh 3798 kWh 2532 kWh £1,028 £253 £1,281 £18,376 14.3 yrs £7,242

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: £868, Upfront: £13,673, Break-even: 15.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1582 kWh 1108 kWh 475 kWh £300 £47 £347 £7,569 21.8 yrs £-624
3 kW 2374 kWh 1662 kWh 712 kWh £450 £71 £521 £9,604 18.4 yrs £813
4 kW 3165 kWh 2215 kWh 949 kWh £600 £95 £694 £11,638 16.8 yrs £2,251
5 kW 3956 kWh 2769 kWh 1187 kWh £749 £119 £868 £13,673 15.8 yrs £3,689
6 kW 4747 kWh 3323 kWh 1424 kWh £899 £142 £1,042 £15,707 15.1 yrs £5,127
7 kW 5539 kWh 3877 kWh 1662 kWh £1,049 £166 £1,215 £17,742 14.6 yrs £6,564
8 kW 6330 kWh 4431 kWh 1899 kWh £1,199 £190 £1,389 £19,776 14.2 yrs £8,002

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: £888, 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 1582 kWh 1155 kWh 427 kWh £313 £43 £355 £9,319 26.2 yrs £-2,212
3 kW 2374 kWh 1733 kWh 641 kWh £469 £64 £533 £11,354 21.3 yrs £-694
4 kW 3165 kWh 2310 kWh 855 kWh £625 £85 £711 £13,388 18.8 yrs £825
5 kW 3956 kWh 2888 kWh 1068 kWh £781 £107 £888 £15,423 17.4 yrs £2,344
6 kW 4747 kWh 3466 kWh 1282 kWh £938 £128 £1,066 £17,457 16.4 yrs £3,863
7 kW 5539 kWh 4043 kWh 1495 kWh £1,094 £150 £1,244 £19,492 15.7 yrs £5,381
8 kW 6330 kWh 4621 kWh 1709 kWh £1,250 £171 £1,421 £21,526 15.1 yrs £6,900

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 1582 kWh 1187 kWh 396 kWh £321 £40 £361 £11,069 30.7 yrs £-3,854
3 kW 2374 kWh 1780 kWh 593 kWh £482 £59 £541 £13,104 24.2 yrs £-2,282
4 kW 3165 kWh 2374 kWh 791 kWh £642 £79 £721 £15,138 21.0 yrs £-709
5 kW 3956 kWh 2967 kWh 989 kWh £803 £99 £902 £17,173 19.0 yrs £864
6 kW 4747 kWh 3561 kWh 1187 kWh £963 £119 £1,082 £19,207 17.7 yrs £2,437
7 kW 5539 kWh 4154 kWh 1385 kWh £1,124 £138 £1,263 £21,242 16.8 yrs £4,009
8 kW 6330 kWh 4747 kWh 1582 kWh £1,285 £158 £1,443 £23,276 16.1 yrs £5,582

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: £915, 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 1582 kWh 1219 kWh 364 kWh £330 £36 £366 £13,519 36.9 yrs £-6,197
3 kW 2374 kWh 1828 kWh 546 kWh £495 £55 £549 £15,554 28.3 yrs £-4,570
4 kW 3165 kWh 2437 kWh 728 kWh £659 £73 £732 £17,588 24.0 yrs £-2,943
5 kW 3956 kWh 3046 kWh 910 kWh £824 £91 £915 £19,623 21.4 yrs £-1,316
6 kW 4747 kWh 3656 kWh 1092 kWh £989 £109 £1,098 £21,657 19.7 yrs £310
7 kW 5539 kWh 4265 kWh 1274 kWh £1,154 £127 £1,281 £23,692 18.5 yrs £1,937
8 kW 6330 kWh 4874 kWh 1456 kWh £1,319 £146 £1,465 £25,726 17.6 yrs £3,564

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 HS4

Figures below are tailored to HS4 — click through for full league tables.

Solar Payback Index Rank #2883 of 2997
13.3 years (UK avg 11.3 years)
~£613 /yr • £8,138 upfront
Standing-Charge Drag Rank #2902 of 2997
36.3% (UK avg 21.7%) drag on savings
£223 fixed • ~£613 /yr value

Your Area at a Glance

Your Electricity Rate
27.06p/kWh
Daily Fixed Charge
61.00p/day
Local Sunshine
791kWh/kW
A 1 kW system generates ~791 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

PA84 (Na h-Eileanan Siar)
≈0.1 km away
Local sunshine: ~792 kWh/kWp · +0% vs HS4
PA85 (Na h-Eileanan Siar)
≈7.4 km away
Local sunshine: ~719 kWh/kWp · -9% vs HS4
HS3 (Na h-Eileanan Siar)
≈7.7 km away
Local sunshine: ~719 kWh/kWp · -9% vs HS4
PA83 (Na h-Eileanan Siar)
≈22.0 km away
Local sunshine: ~809 kWh/kWp · +2% vs HS4
HS5 (Na h-Eileanan Siar)
≈22.1 km away
Local sunshine: ~812 kWh/kWp · +3% vs HS4
HS1 (Na h-Eileanan Siar)
≈42.0 km away
Local sunshine: ~780 kWh/kWp · -1% vs HS4

Similar sunshine across the UK

LL57 (Gwynedd)
~792 kWh/kWp · +0% vs HS4
CA17 (Westmorland and Furness)
~792 kWh/kWp · +0% vs HS4
PA18 (Inverclyde)
~789 kWh/kWp · -0% vs HS4