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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in SK7 (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
14.0 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£870
What you save every year
Profit Over 25 Years
£9,537
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 861 kWh/kW — 9 below the regional median (870).

Read the full story

A typical roof here lands around 6.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 861 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)
861 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: £725, Upfront: £10,173, Break-even: 14.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 688 kWh 1033 kWh £187 £103 £290 £4,069 14.0 yrs £1,729
3 kW 2582 kWh 1033 kWh 1549 kWh £280 £155 £435 £6,104 14.0 yrs £2,594
4 kW 3442 kWh 1377 kWh 2065 kWh £373 £207 £580 £8,138 14.0 yrs £3,459
5 kW 4303 kWh 1721 kWh 2582 kWh £467 £258 £725 £10,173 14.0 yrs £4,324
6 kW 5164 kWh 2065 kWh 3098 kWh £560 £310 £870 £12,207 14.0 yrs £5,188
7 kW 6024 kWh 2410 kWh 3615 kWh £653 £361 £1,015 £14,242 14.0 yrs £6,053
8 kW 6885 kWh 2754 kWh 4131 kWh £747 £413 £1,160 £16,276 14.0 yrs £6,918

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: £872, Upfront: £12,273, Break-even: 14.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1033 kWh 688 kWh £280 £69 £349 £6,169 17.7 yrs £808
3 kW 2582 kWh 1549 kWh 1033 kWh £420 £103 £523 £8,204 15.7 yrs £2,261
4 kW 3442 kWh 2065 kWh 1377 kWh £560 £138 £698 £10,238 14.7 yrs £3,715
5 kW 4303 kWh 2582 kWh 1721 kWh £700 £172 £872 £12,273 14.1 yrs £5,169
6 kW 5164 kWh 3098 kWh 2065 kWh £840 £207 £1,046 £14,307 13.7 yrs £6,623
7 kW 6024 kWh 3615 kWh 2410 kWh £980 £241 £1,221 £16,342 13.4 yrs £8,076
8 kW 6885 kWh 4131 kWh 2754 kWh £1,120 £275 £1,395 £18,376 13.2 yrs £9,530

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: £946, Upfront: £13,673, Break-even: 14.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1205 kWh 516 kWh £327 £52 £378 £7,569 20.0 yrs £-3
3 kW 2582 kWh 1807 kWh 775 kWh £490 £77 £567 £9,604 16.9 yrs £1,745
4 kW 3442 kWh 2410 kWh 1033 kWh £653 £103 £757 £11,638 15.4 yrs £3,493
5 kW 4303 kWh 3012 kWh 1291 kWh £817 £129 £946 £13,673 14.5 yrs £5,241
6 kW 5164 kWh 3615 kWh 1549 kWh £980 £155 £1,135 £15,707 13.8 yrs £6,990
7 kW 6024 kWh 4217 kWh 1807 kWh £1,143 £181 £1,324 £17,742 13.4 yrs £8,738
8 kW 6885 kWh 4819 kWh 2065 kWh £1,307 £207 £1,513 £19,776 13.1 yrs £10,486

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: £968, Upfront: £15,423, Break-even: 15.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1257 kWh 465 kWh £341 £46 £387 £9,319 24.1 yrs £-1,577
3 kW 2582 kWh 1885 kWh 697 kWh £511 £70 £581 £11,354 19.6 yrs £260
4 kW 3442 kWh 2513 kWh 929 kWh £681 £93 £774 £13,388 17.3 yrs £2,096
5 kW 4303 kWh 3141 kWh 1162 kWh £852 £116 £968 £15,423 15.9 yrs £3,933
6 kW 5164 kWh 3770 kWh 1394 kWh £1,022 £139 £1,161 £17,457 15.0 yrs £5,770
7 kW 6024 kWh 4398 kWh 1627 kWh £1,192 £163 £1,355 £19,492 14.4 yrs £7,606
8 kW 6885 kWh 5026 kWh 1859 kWh £1,363 £186 £1,548 £21,526 13.9 yrs £9,443

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: £983, Upfront: £17,173, Break-even: 17.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1291 kWh 430 kWh £350 £43 £393 £11,069 28.2 yrs £-3,209
3 kW 2582 kWh 1936 kWh 645 kWh £525 £65 £590 £13,104 22.2 yrs £-1,313
4 kW 3442 kWh 2582 kWh 861 kWh £700 £86 £786 £15,138 19.3 yrs £582
5 kW 4303 kWh 3227 kWh 1076 kWh £875 £108 £983 £17,173 17.5 yrs £2,478
6 kW 5164 kWh 3873 kWh 1291 kWh £1,050 £129 £1,179 £19,207 16.3 yrs £4,373
7 kW 6024 kWh 4518 kWh 1506 kWh £1,225 £151 £1,376 £21,242 15.4 yrs £6,269
8 kW 6885 kWh 5164 kWh 1721 kWh £1,400 £172 £1,572 £23,276 14.8 yrs £8,164

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: £997, Upfront: £19,623, Break-even: 19.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1721 kWh 1325 kWh 396 kWh £359 £40 £399 £13,519 33.9 yrs £-5,541
3 kW 2582 kWh 1988 kWh 594 kWh £539 £59 £598 £15,554 26.0 yrs £-3,587
4 kW 3442 kWh 2651 kWh 792 kWh £719 £79 £798 £17,588 22.0 yrs £-1,632
5 kW 4303 kWh 3313 kWh 990 kWh £898 £99 £997 £19,623 19.7 yrs £322
6 kW 5164 kWh 3976 kWh 1188 kWh £1,078 £119 £1,197 £21,657 18.1 yrs £2,276
7 kW 6024 kWh 4639 kWh 1386 kWh £1,258 £139 £1,396 £23,692 17.0 yrs £4,231
8 kW 6885 kWh 5301 kWh 1584 kWh £1,437 £158 £1,596 £25,726 16.1 yrs £6,185

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 SK7

Figures below are tailored to SK7 — click through for full league tables.

Big-Roof Britain Rank #481 of 2182
5.6 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #2529 of 2997
12.2 years (UK avg 11.3 years)
~£1,002 /yr • £12,207 upfront
Standing-Charge Drag Rank #1155 of 2997
18.6% (UK avg 21.7%) drag on savings
£187 fixed • ~£1,002 /yr value

Your Area at a Glance

Your Electricity Rate
27.11p/kWh
Daily Fixed Charge
51.16p/day
Local Sunshine
861kWh/kW
A 1 kW system generates ~861 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
6.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 75% • Flats: 16% • Bungalows: 8% Based on 9,373 properties

Coverage

Stockport (100%)

Areas Covered

Bramhall South & Woodford, Hazel Grove, Bramhall North, Norbury & Woodsmoor, Marple South & High Lane, Brinnington & Stockport Central, Offerton, Handforth + 2 more

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

SK2 (Stockport)
≈3.0 km away
Local sunshine: ~851 kWh/kWp · -1% vs SK7
SK3 (Stockport)
≈3.5 km away
Local sunshine: ~861 kWh/kWp · +0% vs SK7
SK1 (Stockport)
≈4.1 km away
Local sunshine: ~861 kWh/kWp · +0% vs SK7
SK8 (Stockport)
≈4.1 km away
Local sunshine: ~875 kWh/kWp · +2% vs SK7
SK4 (Stockport)
≈5.2 km away
Local sunshine: ~859 kWh/kWp · -0% vs SK7
SK6 (Stockport)
≈6.7 km away
Local sunshine: ~852 kWh/kWp · -1% vs SK7

Similar sunshine across the UK

HS8 (Na h-Eileanan Siar)
~861 kWh/kWp · +0% vs SK7
BT51 (Causeway Coast and Glens)
~860 kWh/kWp · -0% vs SK7
BT52 (Causeway Coast and Glens)
~861 kWh/kWp · +0% vs SK7