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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in SK6 (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
£7,763
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 852 kWh/kW — 18 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 852 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)
852 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 1704 kWh 681 kWh 1022 kWh £185 £102 £287 £4,069 14.2 yrs £1,670
3 kW 2556 kWh 1022 kWh 1533 kWh £277 £153 £430 £6,104 14.2 yrs £2,506
4 kW 3407 kWh 1363 kWh 2044 kWh £369 £204 £574 £8,138 14.2 yrs £3,341
5 kW 4259 kWh 1704 kWh 2556 kWh £462 £256 £717 £10,173 14.2 yrs £4,176
6 kW 5111 kWh 2044 kWh 3067 kWh £554 £307 £861 £12,207 14.2 yrs £5,011
7 kW 5963 kWh 2385 kWh 3578 kWh £647 £358 £1,004 £14,242 14.2 yrs £5,846
8 kW 6815 kWh 2726 kWh 4089 kWh £739 £409 £1,148 £16,276 14.2 yrs £6,681

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: £863, 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 1704 kWh 1022 kWh 681 kWh £277 £68 £345 £6,169 17.9 yrs £736
3 kW 2556 kWh 1533 kWh 1022 kWh £416 £102 £518 £8,204 15.8 yrs £2,155
4 kW 3407 kWh 2044 kWh 1363 kWh £554 £136 £691 £10,238 14.8 yrs £3,573
5 kW 4259 kWh 2556 kWh 1704 kWh £693 £170 £863 £12,273 14.2 yrs £4,991
6 kW 5111 kWh 3067 kWh 2044 kWh £831 £204 £1,036 £14,307 13.8 yrs £6,409
7 kW 5963 kWh 3578 kWh 2385 kWh £970 £239 £1,208 £16,342 13.5 yrs £7,827
8 kW 6815 kWh 4089 kWh 2726 kWh £1,108 £273 £1,381 £18,376 13.3 yrs £9,245

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: £936, 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 1704 kWh 1193 kWh 511 kWh £323 £51 £374 £7,569 20.2 yrs £-81
3 kW 2556 kWh 1789 kWh 767 kWh £485 £77 £562 £9,604 17.1 yrs £1,629
4 kW 3407 kWh 2385 kWh 1022 kWh £647 £102 £749 £11,638 15.5 yrs £3,339
5 kW 4259 kWh 2981 kWh 1278 kWh £808 £128 £936 £13,673 14.6 yrs £5,048
6 kW 5111 kWh 3578 kWh 1533 kWh £970 £153 £1,123 £15,707 14.0 yrs £6,758
7 kW 5963 kWh 4174 kWh 1789 kWh £1,132 £179 £1,310 £17,742 13.5 yrs £8,468
8 kW 6815 kWh 4770 kWh 2044 kWh £1,293 £204 £1,498 £19,776 13.2 yrs £10,177

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: £958, 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 1704 kWh 1244 kWh 460 kWh £337 £46 £383 £9,319 24.3 yrs £-1,656
3 kW 2556 kWh 1866 kWh 690 kWh £506 £69 £575 £11,354 19.8 yrs £141
4 kW 3407 kWh 2487 kWh 920 kWh £674 £92 £766 £13,388 17.5 yrs £1,938
5 kW 4259 kWh 3109 kWh 1150 kWh £843 £115 £958 £15,423 16.1 yrs £3,736
6 kW 5111 kWh 3731 kWh 1380 kWh £1,011 £138 £1,149 £17,457 15.2 yrs £5,533
7 kW 5963 kWh 4353 kWh 1610 kWh £1,180 £161 £1,341 £19,492 14.5 yrs £7,330
8 kW 6815 kWh 4975 kWh 1840 kWh £1,349 £184 £1,533 £21,526 14.0 yrs £9,127

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 1704 kWh 1278 kWh 426 kWh £346 £43 £389 £11,069 28.5 yrs £-3,289
3 kW 2556 kWh 1917 kWh 639 kWh £520 £64 £583 £13,104 22.5 yrs £-1,434
4 kW 3407 kWh 2556 kWh 852 kWh £693 £85 £778 £15,138 19.5 yrs £422
5 kW 4259 kWh 3194 kWh 1065 kWh £866 £106 £972 £17,173 17.7 yrs £2,277
6 kW 5111 kWh 3833 kWh 1278 kWh £1,039 £128 £1,167 £19,207 16.5 yrs £4,133
7 kW 5963 kWh 4472 kWh 1491 kWh £1,212 £149 £1,361 £21,242 15.6 yrs £5,988
8 kW 6815 kWh 5111 kWh 1704 kWh £1,386 £170 £1,556 £23,276 15.0 yrs £7,843

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: £987, 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 1704 kWh 1312 kWh 392 kWh £356 £39 £395 £13,519 34.2 yrs £-5,623
3 kW 2556 kWh 1968 kWh 588 kWh £533 £59 £592 £15,554 26.3 yrs £-3,709
4 kW 3407 kWh 2624 kWh 784 kWh £711 £78 £790 £17,588 22.3 yrs £-1,795
5 kW 4259 kWh 3280 kWh 980 kWh £889 £98 £987 £19,623 19.9 yrs £119
6 kW 5111 kWh 3936 kWh 1176 kWh £1,067 £118 £1,184 £21,657 18.3 yrs £2,032
7 kW 5963 kWh 4591 kWh 1371 kWh £1,245 £137 £1,382 £23,692 17.1 yrs £3,946
8 kW 6815 kWh 5247 kWh 1567 kWh £1,423 £157 £1,579 £25,726 16.3 yrs £5,860

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 SK6

Figures below are tailored to SK6 — click through for full league tables.

Big-Roof Britain Rank #956 of 2182
5.1 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #2580 of 2997
12.3 years (UK avg 11.3 years)
~£827 /yr • £10,173 upfront
Standing-Charge Drag Rank #2029 of 2997
22.6% (UK avg 21.7%) drag on savings
£187 fixed • ~£827 /yr value

Your Area at a Glance

Your Electricity Rate
27.11p/kWh
Daily Fixed Charge
51.16p/day
Local Sunshine
852kWh/kW
A 1 kW system generates ~852 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: 67% • Flats: 19% • Bungalows: 13% Based on 11,441 properties

Coverage

Stockport (100%)

Areas Covered

Bredbury & Woodley, Marple South & High Lane, Marple North, Bredbury Green & Romiley, Hazel Grove, Disley, Poynton East and Pott Shrigley, Brinnington & Stockport Central

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)
≈4.2 km away
Local sunshine: ~851 kWh/kWp · -0% vs SK6
SK14 (Tameside)
≈4.7 km away
Local sunshine: ~841 kWh/kWp · -1% vs SK6
SK1 (Stockport)
≈5.1 km away
Local sunshine: ~861 kWh/kWp · +1% vs SK6
M34 (Tameside)
≈5.4 km away
Local sunshine: ~845 kWh/kWp · -1% vs SK6
SK5 (Stockport)
≈5.7 km away
Local sunshine: ~861 kWh/kWp · +1% vs SK6
SK3 (Stockport)
≈5.9 km away
Local sunshine: ~861 kWh/kWp · +1% vs SK6

Similar sunshine across the UK

BT46 (Mid Ulster)
~852 kWh/kWp · -0% vs SK6
AB44 (Aberdeenshire)
~852 kWh/kWp · -0% vs SK6
EH27 (West Lothian)
~852 kWh/kWp · +0% vs SK6