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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in SK2 (Stockport)

See if solar pays off for you in Stockport — 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
14.2 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£717
What you save every year
Profit Over 25 Years
£7,745
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 North West, the current unit rate is 27.11p/kWh with a 51.16p/day standing charge. Your postcode’s south-facing sunshine yield is 851 kWh/kW — 19 below the regional median (870).

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 851 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
51.2p/day
Sunshine yield (south)
851 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: £717, Upfront: £10,173, Break-even: 14.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1702 kWh 681 kWh 1021 kWh £185 £102 £287 £4,069 14.2 yrs £1,665
3 kW 2553 kWh 1021 kWh 1532 kWh £277 £153 £430 £6,104 14.2 yrs £2,497
4 kW 3404 kWh 1362 kWh 2042 kWh £369 £204 £573 £8,138 14.2 yrs £3,329
5 kW 4255 kWh 1702 kWh 2553 kWh £461 £255 £717 £10,173 14.2 yrs £4,162
6 kW 5106 kWh 2042 kWh 3064 kWh £554 £306 £860 £12,207 14.2 yrs £4,994
7 kW 5957 kWh 2383 kWh 3574 kWh £646 £357 £1,003 £14,242 14.2 yrs £5,827
8 kW 6808 kWh 2723 kWh 4085 kWh £738 £408 £1,147 £16,276 14.2 yrs £6,659

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: £862, Upfront: £12,273, Break-even: 14.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1702 kWh 1021 kWh 681 kWh £277 £68 £345 £6,169 17.9 yrs £730
3 kW 2553 kWh 1532 kWh 1021 kWh £415 £102 £517 £8,204 15.9 yrs £2,144
4 kW 3404 kWh 2042 kWh 1362 kWh £554 £136 £690 £10,238 14.8 yrs £3,559
5 kW 4255 kWh 2553 kWh 1702 kWh £692 £170 £862 £12,273 14.2 yrs £4,974
6 kW 5106 kWh 3064 kWh 2042 kWh £831 £204 £1,035 £14,307 13.8 yrs £6,389
7 kW 5957 kWh 3574 kWh 2383 kWh £969 £238 £1,207 £16,342 13.5 yrs £7,804
8 kW 6808 kWh 4085 kWh 2723 kWh £1,107 £272 £1,380 £18,376 13.3 yrs £9,218

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: £935, Upfront: £13,673, Break-even: 14.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1702 kWh 1191 kWh 511 kWh £323 £51 £374 £7,569 20.2 yrs £-88
3 kW 2553 kWh 1787 kWh 766 kWh £484 £77 £561 £9,604 17.1 yrs £1,618
4 kW 3404 kWh 2383 kWh 1021 kWh £646 £102 £748 £11,638 15.6 yrs £3,324
5 kW 4255 kWh 2979 kWh 1277 kWh £807 £128 £935 £13,673 14.6 yrs £5,030
6 kW 5106 kWh 3574 kWh 1532 kWh £969 £153 £1,122 £15,707 14.0 yrs £6,736
7 kW 5957 kWh 4170 kWh 1787 kWh £1,130 £179 £1,309 £17,742 13.6 yrs £8,442
8 kW 6808 kWh 4766 kWh 2042 kWh £1,292 £204 £1,496 £19,776 13.2 yrs £10,148

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: £957, Upfront: £15,423, Break-even: 16.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1702 kWh 1242 kWh 460 kWh £337 £46 £383 £9,319 24.3 yrs £-1,663
3 kW 2553 kWh 1864 kWh 689 kWh £505 £69 £574 £11,354 19.8 yrs £130
4 kW 3404 kWh 2485 kWh 919 kWh £674 £92 £766 £13,388 17.5 yrs £1,924
5 kW 4255 kWh 3106 kWh 1149 kWh £842 £115 £957 £15,423 16.1 yrs £3,717
6 kW 5106 kWh 3727 kWh 1379 kWh £1,011 £138 £1,148 £17,457 15.2 yrs £5,510
7 kW 5957 kWh 4349 kWh 1608 kWh £1,179 £161 £1,340 £19,492 14.5 yrs £7,304
8 kW 6808 kWh 4970 kWh 1838 kWh £1,347 £184 £1,531 £21,526 14.1 yrs £9,097

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: £972, Upfront: £17,173, Break-even: 17.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1702 kWh 1277 kWh 426 kWh £346 £43 £389 £11,069 28.5 yrs £-3,297
3 kW 2553 kWh 1915 kWh 638 kWh £519 £64 £583 £13,104 22.5 yrs £-1,445
4 kW 3404 kWh 2553 kWh 851 kWh £692 £85 £777 £15,138 19.5 yrs £407
5 kW 4255 kWh 3191 kWh 1064 kWh £865 £106 £972 £17,173 17.7 yrs £2,258
6 kW 5106 kWh 3830 kWh 1277 kWh £1,038 £128 £1,166 £19,207 16.5 yrs £4,110
7 kW 5957 kWh 4468 kWh 1489 kWh £1,211 £149 £1,360 £21,242 15.6 yrs £5,961
8 kW 6808 kWh 5106 kWh 1702 kWh £1,384 £170 £1,554 £23,276 15.0 yrs £7,813

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: £986, Upfront: £19,623, 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 1702 kWh 1311 kWh 391 kWh £355 £39 £394 £13,519 34.3 yrs £-5,630
3 kW 2553 kWh 1966 kWh 587 kWh £533 £59 £592 £15,554 26.3 yrs £-3,720
4 kW 3404 kWh 2621 kWh 783 kWh £711 £78 £789 £17,588 22.3 yrs £-1,811
5 kW 4255 kWh 3276 kWh 979 kWh £888 £98 £986 £19,623 19.9 yrs £99
6 kW 5106 kWh 3932 kWh 1174 kWh £1,066 £117 £1,183 £21,657 18.3 yrs £2,009
7 kW 5957 kWh 4587 kWh 1370 kWh £1,244 £137 £1,381 £23,692 17.2 yrs £3,919
8 kW 6808 kWh 5242 kWh 1566 kWh £1,421 £157 £1,578 £25,726 16.3 yrs £5,829

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 SK2

Figures below are tailored to SK2 — click through for full league tables.

Big-Roof Britain Rank #1553 of 2182
4.6 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #2578 of 2997
12.3 years (UK avg 11.3 years)
~£826 /yr • £10,173 upfront
Standing-Charge Drag Rank #2028 of 2997
22.6% (UK avg 21.7%) drag on savings
£187 fixed • ~£826 /yr value

Your Area at a Glance

Your Electricity Rate
27.11p/kWh
Daily Fixed Charge
51.16p/day
Local Sunshine
851kWh/kW
A 1 kW system generates ~851 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

Houses: 72% • Flats: 23% • Bungalows: 4% Based on 7,129 properties

Coverage

Stockport (100%)

Areas Covered

Offerton, Brinnington & Stockport Central, Manor, Davenport & Cale Green, Hazel Grove, Norbury & Woodsmoor, Marple South & High Lane

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 North West

SK1 (Stockport)
≈1.8 km away
Local sunshine: ~861 kWh/kWp · +1% vs SK2
SK3 (Stockport)
≈2.1 km away
Local sunshine: ~861 kWh/kWp · +1% vs SK2
SK7 (Stockport)
≈3.0 km away
Local sunshine: ~861 kWh/kWp · +1% vs SK2
SK4 (Stockport)
≈3.4 km away
Local sunshine: ~859 kWh/kWp · +1% vs SK2
SK6 (Stockport)
≈4.2 km away
Local sunshine: ~852 kWh/kWp · +0% vs SK2
SK5 (Stockport)
≈4.4 km away
Local sunshine: ~861 kWh/kWp · +1% vs SK2

Similar sunshine across the UK

KA30 (North Ayrshire)
~851 kWh/kWp · -0% vs SK2
FK3 (Falkirk)
~851 kWh/kWp · -0% vs SK2
EH99 (City of Edinburgh)
~851 kWh/kWp · +0% vs SK2