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Solar Panels in FK21 (Stirling)

See if solar pays off for you in Stirling — 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
15.7 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£646
What you save every year
Profit Over 25 Years
£5,977
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 768 kWh/kW — 47 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 768 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)
768 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: £10,173, Break-even: 15.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1536 kWh 614 kWh 922 kWh £166 £92 £258 £4,069 15.7 yrs £1,099
3 kW 2304 kWh 922 kWh 1382 kWh £249 £138 £388 £6,104 15.7 yrs £1,648
4 kW 3072 kWh 1229 kWh 1843 kWh £332 £184 £517 £8,138 15.7 yrs £2,198
5 kW 3840 kWh 1536 kWh 2304 kWh £416 £230 £646 £10,173 15.7 yrs £2,747
6 kW 4608 kWh 1843 kWh 2765 kWh £499 £276 £775 £12,207 15.7 yrs £3,297
7 kW 5376 kWh 2150 kWh 3225 kWh £582 £323 £904 £14,242 15.7 yrs £3,846
8 kW 6144 kWh 2457 kWh 3686 kWh £665 £369 £1,034 £16,276 15.7 yrs £4,396

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: £777, Upfront: £12,273, 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 1536 kWh 922 kWh 614 kWh £249 £61 £311 £6,169 19.8 yrs £47
3 kW 2304 kWh 1382 kWh 922 kWh £374 £92 £466 £8,204 17.6 yrs £1,121
4 kW 3072 kWh 1843 kWh 1229 kWh £499 £123 £622 £10,238 16.5 yrs £2,194
5 kW 3840 kWh 2304 kWh 1536 kWh £623 £154 £777 £12,273 15.8 yrs £3,268
6 kW 4608 kWh 2765 kWh 1843 kWh £748 £184 £932 £14,307 15.3 yrs £4,341
7 kW 5376 kWh 3225 kWh 2150 kWh £873 £215 £1,088 £16,342 15.0 yrs £5,415
8 kW 6144 kWh 3686 kWh 2457 kWh £997 £246 £1,243 £18,376 14.8 yrs £6,488

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: £843, Upfront: £13,673, Break-even: 16.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1536 kWh 1075 kWh 461 kWh £291 £46 £337 £7,569 22.5 yrs £-829
3 kW 2304 kWh 1613 kWh 691 kWh £436 £69 £506 £9,604 19.0 yrs £507
4 kW 3072 kWh 2150 kWh 922 kWh £582 £92 £674 £11,638 17.3 yrs £1,842
5 kW 3840 kWh 2688 kWh 1152 kWh £727 £115 £843 £13,673 16.2 yrs £3,178
6 kW 4608 kWh 3225 kWh 1382 kWh £873 £138 £1,011 £15,707 15.5 yrs £4,513
7 kW 5376 kWh 3763 kWh 1613 kWh £1,018 £161 £1,180 £17,742 15.0 yrs £5,849
8 kW 6144 kWh 4301 kWh 1843 kWh £1,164 £184 £1,348 £19,776 14.7 yrs £7,184

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: £862, Upfront: £15,423, Break-even: 17.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1536 kWh 1121 kWh 415 kWh £303 £41 £345 £9,319 27.0 yrs £-2,422
3 kW 2304 kWh 1682 kWh 622 kWh £455 £62 £517 £11,354 21.9 yrs £-1,007
4 kW 3072 kWh 2242 kWh 829 kWh £607 £83 £690 £13,388 19.4 yrs £407
5 kW 3840 kWh 2803 kWh 1037 kWh £758 £104 £862 £15,423 17.9 yrs £1,821
6 kW 4608 kWh 3364 kWh 1244 kWh £910 £124 £1,035 £17,457 16.9 yrs £3,235
7 kW 5376 kWh 3924 kWh 1451 kWh £1,062 £145 £1,207 £19,492 16.1 yrs £4,649
8 kW 6144 kWh 4485 kWh 1659 kWh £1,214 £166 £1,379 £21,526 15.6 yrs £6,063

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: £875, Upfront: £17,173, 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 1536 kWh 1152 kWh 384 kWh £312 £38 £350 £11,069 31.6 yrs £-4,067
3 kW 2304 kWh 1728 kWh 576 kWh £468 £58 £525 £13,104 25.0 yrs £-2,600
4 kW 3072 kWh 2304 kWh 768 kWh £623 £77 £700 £15,138 21.6 yrs £-1,134
5 kW 3840 kWh 2880 kWh 960 kWh £779 £96 £875 £17,173 19.6 yrs £333
6 kW 4608 kWh 3456 kWh 1152 kWh £935 £115 £1,050 £19,207 18.3 yrs £1,799
7 kW 5376 kWh 4032 kWh 1344 kWh £1,091 £134 £1,225 £21,242 17.3 yrs £3,266
8 kW 6144 kWh 4608 kWh 1536 kWh £1,247 £154 £1,400 £23,276 16.6 yrs £4,733

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: £888, Upfront: £19,623, Break-even: 22.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1536 kWh 1183 kWh 353 kWh £320 £35 £355 £13,519 38.0 yrs £-6,412
3 kW 2304 kWh 1774 kWh 530 kWh £480 £53 £533 £15,554 29.2 yrs £-4,893
4 kW 3072 kWh 2365 kWh 707 kWh £640 £71 £711 £17,588 24.7 yrs £-3,374
5 kW 3840 kWh 2957 kWh 883 kWh £800 £88 £888 £19,623 22.1 yrs £-1,855
6 kW 4608 kWh 3548 kWh 1060 kWh £960 £106 £1,066 £21,657 20.3 yrs £-336
7 kW 5376 kWh 4139 kWh 1236 kWh £1,120 £124 £1,244 £23,692 19.0 yrs £1,183
8 kW 6144 kWh 4731 kWh 1413 kWh £1,280 £141 £1,421 £25,726 18.1 yrs £2,702

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 FK21

Figures below are tailored to FK21 — click through for full league tables.

Solar Payback Index Rank #2934 of 2997
13.7 years (UK avg 11.3 years)
~£595 /yr • £8,138 upfront
Standing-Charge Drag Rank #2938 of 2997
37.4% (UK avg 21.7%) drag on savings
£223 fixed • ~£595 /yr value

Your Area at a Glance

Your Electricity Rate
27.06p/kWh
Daily Fixed Charge
61.00p/day
Local Sunshine
768kWh/kW
A 1 kW system generates ~768 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

Stirling (96%)|Perth and Kinross (4%)

Areas Covered

Trossachs and Teith, Highland

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

FK19 (Stirling)
≈9.3 km away
Local sunshine: ~769 kWh/kWp · +0% vs FK21
FK18 (Stirling)
≈15.9 km away
Local sunshine: ~753 kWh/kWp · -2% vs FK21
FK20 (Stirling)
≈20.2 km away
Local sunshine: ~735 kWh/kWp · -4% vs FK21
PH6 (Perth and Kinross)
≈23.1 km away
Local sunshine: ~824 kWh/kWp · +7% vs FK21
PH17 (Perth and Kinross)
≈24.1 km away
Local sunshine: ~751 kWh/kWp · -2% vs FK21
FK17 (Stirling)
≈25.8 km away
Local sunshine: ~831 kWh/kWp · +8% vs FK21

Similar sunshine across the UK

CA12 (Cumberland)
~767 kWh/kWp · -0% vs FK21
G84 (Argyll and Bute)
~766 kWh/kWp · -0% vs FK21
DL11 (North Yorkshire)
~765 kWh/kWp · -0% vs FK21