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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in SK17 (High Peak)

See if solar pays off for you in High Peak — 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
13.4 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£757
What you save every year
Profit Over 25 Years
£8,744
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 898 kWh/kW — 28 above 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 898 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)
898 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: £757, Upfront: £10,173, Break-even: 13.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1797 kWh 719 kWh 1078 kWh £195 £108 £303 £4,069 13.4 yrs £1,984
3 kW 2695 kWh 1078 kWh 1617 kWh £292 £162 £454 £6,104 13.4 yrs £2,976
4 kW 3594 kWh 1438 kWh 2156 kWh £390 £216 £605 £8,138 13.4 yrs £3,969
5 kW 4492 kWh 1797 kWh 2695 kWh £487 £270 £757 £10,173 13.4 yrs £4,961
6 kW 5391 kWh 2156 kWh 3234 kWh £585 £323 £908 £12,207 13.4 yrs £5,953
7 kW 6289 kWh 2516 kWh 3773 kWh £682 £377 £1,059 £14,242 13.4 yrs £6,945
8 kW 7188 kWh 2875 kWh 4313 kWh £779 £431 £1,211 £16,276 13.4 yrs £7,937

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: £910, Upfront: £12,273, Break-even: 13.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1797 kWh 1078 kWh 719 kWh £292 £72 £364 £6,169 16.9 yrs £1,114
3 kW 2695 kWh 1617 kWh 1078 kWh £438 £108 £546 £8,204 15.0 yrs £2,721
4 kW 3594 kWh 2156 kWh 1438 kWh £585 £144 £728 £10,238 14.1 yrs £4,328
5 kW 4492 kWh 2695 kWh 1797 kWh £731 £180 £910 £12,273 13.5 yrs £5,935
6 kW 5391 kWh 3234 kWh 2156 kWh £877 £216 £1,092 £14,307 13.1 yrs £7,542
7 kW 6289 kWh 3773 kWh 2516 kWh £1,023 £252 £1,275 £16,342 12.8 yrs £9,149
8 kW 7188 kWh 4313 kWh 2875 kWh £1,169 £288 £1,457 £18,376 12.6 yrs £10,756

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: £987, Upfront: £13,673, Break-even: 13.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1797 kWh 1258 kWh 539 kWh £341 £54 £395 £7,569 19.2 yrs £329
3 kW 2695 kWh 1887 kWh 809 kWh £511 £81 £592 £9,604 16.2 yrs £2,243
4 kW 3594 kWh 2516 kWh 1078 kWh £682 £108 £790 £11,638 14.7 yrs £4,158
5 kW 4492 kWh 3145 kWh 1348 kWh £852 £135 £987 £13,673 13.8 yrs £6,072
6 kW 5391 kWh 3773 kWh 1617 kWh £1,023 £162 £1,185 £15,707 13.3 yrs £7,987
7 kW 6289 kWh 4402 kWh 1887 kWh £1,193 £189 £1,382 £17,742 12.8 yrs £9,901
8 kW 7188 kWh 5031 kWh 2156 kWh £1,364 £216 £1,580 £19,776 12.5 yrs £11,816

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: £1,010, Upfront: £15,423, Break-even: 15.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1797 kWh 1312 kWh 485 kWh £356 £49 £404 £9,319 23.1 yrs £-1,237
3 kW 2695 kWh 1968 kWh 728 kWh £533 £73 £606 £11,354 18.7 yrs £770
4 kW 3594 kWh 2623 kWh 970 kWh £711 £97 £808 £13,388 16.6 yrs £2,777
5 kW 4492 kWh 3279 kWh 1213 kWh £889 £121 £1,010 £15,423 15.3 yrs £4,784
6 kW 5391 kWh 3935 kWh 1455 kWh £1,067 £146 £1,212 £17,457 14.4 yrs £6,790
7 kW 6289 kWh 4591 kWh 1698 kWh £1,245 £170 £1,414 £19,492 13.8 yrs £8,797
8 kW 7188 kWh 5247 kWh 1941 kWh £1,422 £194 £1,616 £21,526 13.3 yrs £10,804

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: £1,026, Upfront: £17,173, 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 1797 kWh 1348 kWh 449 kWh £365 £45 £410 £11,069 27.0 yrs £-2,864
3 kW 2695 kWh 2021 kWh 674 kWh £548 £67 £615 £13,104 21.3 yrs £-795
4 kW 3594 kWh 2695 kWh 898 kWh £731 £90 £821 £15,138 18.4 yrs £1,273
5 kW 4492 kWh 3369 kWh 1123 kWh £913 £112 £1,026 £17,173 16.7 yrs £3,341
6 kW 5391 kWh 4043 kWh 1348 kWh £1,096 £135 £1,231 £19,207 15.6 yrs £5,409
7 kW 6289 kWh 4717 kWh 1572 kWh £1,279 £157 £1,436 £21,242 14.8 yrs £7,478
8 kW 7188 kWh 5391 kWh 1797 kWh £1,461 £180 £1,641 £23,276 14.2 yrs £9,546

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: £1,041, Upfront: £19,623, Break-even: 18.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1797 kWh 1384 kWh 413 kWh £375 £41 £416 £13,519 32.5 yrs £-5,191
3 kW 2695 kWh 2075 kWh 620 kWh £563 £62 £625 £15,554 24.9 yrs £-3,061
4 kW 3594 kWh 2767 kWh 827 kWh £750 £83 £833 £17,588 21.1 yrs £-931
5 kW 4492 kWh 3459 kWh 1033 kWh £938 £103 £1,041 £19,623 18.8 yrs £1,199
6 kW 5391 kWh 4151 kWh 1240 kWh £1,125 £124 £1,249 £21,657 17.3 yrs £3,328
7 kW 6289 kWh 4843 kWh 1446 kWh £1,313 £145 £1,457 £23,692 16.3 yrs £5,458
8 kW 7188 kWh 5534 kWh 1653 kWh £1,500 £165 £1,666 £25,726 15.4 yrs £7,588

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 SK17

Figures below are tailored to SK17 — click through for full league tables.

Big-Roof Britain Rank #1373 of 2182
4.8 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #2026 of 2997
11.7 years (UK avg 11.3 years)
~£872 /yr • £10,173 upfront
Standing-Charge Drag Rank #1697 of 2997
21.4% (UK avg 21.7%) drag on savings
£187 fixed • ~£872 /yr value

Your Area at a Glance

Your Electricity Rate
27.11p/kWh
Daily Fixed Charge
51.16p/day
Local Sunshine
898kWh/kW
A 1 kW system generates ~898 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: 69% • Flats: 24% • Bungalows: 5% Based on 8,827 properties

Coverage

High Peak (74%)|Derbyshire Dales (17%)|Staffordshire Moorlands (9%)

Areas Covered

Corbar, Buxton Central, Cote Heath, Tideswell, Stone Bench, Hartington & Taddington, Limestone Peak, Manifold + 4 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

SK23 (High Peak)
≈8.1 km away
Local sunshine: ~881 kWh/kWp · -2% vs SK17
SK12 (High Peak)
≈12.3 km away
Local sunshine: ~847 kWh/kWp · -6% vs SK17
SK22 (High Peak)
≈14.1 km away
Local sunshine: ~850 kWh/kWp · -5% vs SK17
SK10 (Cheshire East)
≈14.6 km away
Local sunshine: ~839 kWh/kWp · -7% vs SK17
SK11 (Cheshire East)
≈14.8 km away
Local sunshine: ~827 kWh/kWp · -8% vs SK17
SK6 (Stockport)
≈20.6 km away
Local sunshine: ~852 kWh/kWp · -5% vs SK17

Similar sunshine across the UK

AB2 (Aberdeen City)
~898 kWh/kWp · -0% vs SK17
ST5 (Newcastle-under-Lyme)
~898 kWh/kWp · -0% vs SK17
CF45 (Rhondda Cynon Taf)
~898 kWh/kWp · -0% vs SK17