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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in PH6 (Perth and Kinross)

See if solar pays off for you in Perth and Kinross — 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
14.7 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£693
What you save every year
Profit Over 25 Years
£7,148
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 824 kWh/kW — 9 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 824 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)
824 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: £693, Upfront: £10,173, Break-even: 14.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1647 kWh 659 kWh 988 kWh £178 £99 £277 £4,069 14.7 yrs £1,473
3 kW 2471 kWh 988 kWh 1482 kWh £267 £148 £416 £6,104 14.7 yrs £2,210
4 kW 3294 kWh 1318 kWh 1977 kWh £357 £198 £554 £8,138 14.7 yrs £2,947
5 kW 4118 kWh 1647 kWh 2471 kWh £446 £247 £693 £10,173 14.7 yrs £3,684
6 kW 4942 kWh 1977 kWh 2965 kWh £535 £296 £831 £12,207 14.7 yrs £4,420
7 kW 5765 kWh 2306 kWh 3459 kWh £624 £346 £970 £14,242 14.7 yrs £5,157
8 kW 6589 kWh 2635 kWh 3953 kWh £713 £395 £1,108 £16,276 14.7 yrs £5,894

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: £833, Upfront: £12,273, Break-even: 14.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1647 kWh 988 kWh 659 kWh £267 £66 £333 £6,169 18.5 yrs £497
3 kW 2471 kWh 1482 kWh 988 kWh £401 £99 £500 £8,204 16.4 yrs £1,796
4 kW 3294 kWh 1977 kWh 1318 kWh £535 £132 £667 £10,238 15.4 yrs £3,095
5 kW 4118 kWh 2471 kWh 1647 kWh £669 £165 £833 £12,273 14.7 yrs £4,394
6 kW 4942 kWh 2965 kWh 1977 kWh £802 £198 £1,000 £14,307 14.3 yrs £5,692
7 kW 5765 kWh 3459 kWh 2306 kWh £936 £231 £1,167 £16,342 14.0 yrs £6,991
8 kW 6589 kWh 3953 kWh 2635 kWh £1,070 £264 £1,333 £18,376 13.8 yrs £8,290

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: £904, Upfront: £13,673, Break-even: 15.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1647 kWh 1153 kWh 494 kWh £312 £49 £361 £7,569 20.9 yrs £-341
3 kW 2471 kWh 1730 kWh 741 kWh £468 £74 £542 £9,604 17.7 yrs £1,239
4 kW 3294 kWh 2306 kWh 988 kWh £624 £99 £723 £11,638 16.1 yrs £2,819
5 kW 4118 kWh 2883 kWh 1235 kWh £780 £124 £904 £13,673 15.1 yrs £4,399
6 kW 4942 kWh 3459 kWh 1482 kWh £936 £148 £1,084 £15,707 14.5 yrs £5,978
7 kW 5765 kWh 4036 kWh 1730 kWh £1,092 £173 £1,265 £17,742 14.0 yrs £7,558
8 kW 6589 kWh 4612 kWh 1977 kWh £1,248 £198 £1,446 £19,776 13.7 yrs £9,138

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: £925, Upfront: £15,423, 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 1647 kWh 1202 kWh 445 kWh £325 £44 £370 £9,319 25.2 yrs £-1,922
3 kW 2471 kWh 1804 kWh 667 kWh £488 £67 £555 £11,354 20.5 yrs £-258
4 kW 3294 kWh 2405 kWh 889 kWh £651 £89 £740 £13,388 18.1 yrs £1,406
5 kW 4118 kWh 3006 kWh 1112 kWh £813 £111 £925 £15,423 16.7 yrs £3,070
6 kW 4942 kWh 3607 kWh 1334 kWh £976 £133 £1,110 £17,457 15.7 yrs £4,734
7 kW 5765 kWh 4209 kWh 1557 kWh £1,139 £156 £1,294 £19,492 15.1 yrs £6,398
8 kW 6589 kWh 4810 kWh 1779 kWh £1,302 £178 £1,479 £21,526 14.6 yrs £8,062

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: £939, Upfront: £17,173, Break-even: 18.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1647 kWh 1235 kWh 412 kWh £334 £41 £375 £11,069 29.5 yrs £-3,560
3 kW 2471 kWh 1853 kWh 618 kWh £501 £62 £563 £13,104 23.3 yrs £-1,839
4 kW 3294 kWh 2471 kWh 824 kWh £669 £82 £751 £15,138 20.2 yrs £-119
5 kW 4118 kWh 3088 kWh 1029 kWh £836 £103 £939 £17,173 18.3 yrs £1,601
6 kW 4942 kWh 3706 kWh 1235 kWh £1,003 £124 £1,126 £19,207 17.1 yrs £3,321
7 kW 5765 kWh 4324 kWh 1441 kWh £1,170 £144 £1,314 £21,242 16.2 yrs £5,042
8 kW 6589 kWh 4942 kWh 1647 kWh £1,337 £165 £1,502 £23,276 15.5 yrs £6,762

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: £953, Upfront: £19,623, Break-even: 20.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1647 kWh 1268 kWh 379 kWh £343 £38 £381 £13,519 35.5 yrs £-5,897
3 kW 2471 kWh 1902 kWh 568 kWh £515 £57 £572 £15,554 27.2 yrs £-4,121
4 kW 3294 kWh 2537 kWh 758 kWh £686 £76 £762 £17,588 23.1 yrs £-2,344
5 kW 4118 kWh 3171 kWh 947 kWh £858 £95 £953 £19,623 20.6 yrs £-568
6 kW 4942 kWh 3805 kWh 1137 kWh £1,030 £114 £1,143 £21,657 18.9 yrs £1,209
7 kW 5765 kWh 4439 kWh 1326 kWh £1,201 £133 £1,334 £23,692 17.8 yrs £2,985
8 kW 6589 kWh 5073 kWh 1515 kWh £1,373 £152 £1,524 £25,726 16.9 yrs £4,762

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 PH6

Figures below are tailored to PH6 — click through for full league tables.

Solar Payback Index Rank #2714 of 2997
12.7 years (UK avg 11.3 years)
~£798 /yr • £10,173 upfront
Standing-Charge Drag Rank #2526 of 2997
27.9% (UK avg 21.7%) drag on savings
£223 fixed • ~£798 /yr value

Your Area at a Glance

Your Electricity Rate
27.06p/kWh
Daily Fixed Charge
61.00p/day
Local Sunshine
824kWh/kW
A 1 kW system generates ~824 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

Perth and Kinross (100%)

Areas Covered

Strathearn

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

PH7 (Perth and Kinross)
≈9.0 km away
Local sunshine: ~856 kWh/kWp · +4% vs PH6
PH5 (Perth and Kinross)
≈10.5 km away
Local sunshine: ~847 kWh/kWp · +3% vs PH6
PH4 (Perth and Kinross)
≈17.6 km away
Local sunshine: ~839 kWh/kWp · +2% vs PH6
FK19 (Stirling)
≈18.7 km away
Local sunshine: ~769 kWh/kWp · -7% vs PH6
PH3 (Perth and Kinross)
≈19.1 km away
Local sunshine: ~836 kWh/kWp · +1% vs PH6
FK17 (Stirling)
≈20.3 km away
Local sunshine: ~831 kWh/kWp · +1% vs PH6

Similar sunshine across the UK

LL25 (Conwy)
~823 kWh/kWp · -0% vs PH6
BT75 (Mid Ulster)
~824 kWh/kWp · +0% vs PH6
OL14 (Calderdale)
~822 kWh/kWp · -0% vs PH6