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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in HX7 (Calderdale)

See if solar pays off for you in Calderdale — 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
14.4 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£706
What you save every year
Profit Over 25 Years
£7,475
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 Yorkshire, the current unit rate is 25.33p/kWh with a 58.65p/day standing charge. Your postcode’s south-facing sunshine yield is 875 kWh/kW — 54 below the regional median (929).

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 875 kWh per year on a south-facing roof. We value self-used electricity at 25.3p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
25.3p/kWh
Standing charge
58.6p/day
Sunshine yield (south)
875 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: £706, Upfront: £10,173, Break-even: 14.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1750 kWh 700 kWh 1050 kWh £177 £105 £282 £4,069 14.4 yrs £1,578
3 kW 2625 kWh 1050 kWh 1575 kWh £266 £158 £424 £6,104 14.4 yrs £2,367
4 kW 3501 kWh 1400 kWh 2100 kWh £355 £210 £565 £8,138 14.4 yrs £3,156
5 kW 4376 kWh 1750 kWh 2625 kWh £443 £263 £706 £10,173 14.4 yrs £3,946
6 kW 5251 kWh 2100 kWh 3151 kWh £532 £315 £847 £12,207 14.4 yrs £4,735
7 kW 6126 kWh 2450 kWh 3676 kWh £621 £368 £988 £14,242 14.4 yrs £5,524
8 kW 7001 kWh 2801 kWh 4201 kWh £709 £420 £1,129 £16,276 14.4 yrs £6,313

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: £840, Upfront: £12,273, 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 1750 kWh 1050 kWh 700 kWh £266 £70 £336 £6,169 18.4 yrs £552
3 kW 2625 kWh 1575 kWh 1050 kWh £399 £105 £504 £8,204 16.3 yrs £1,877
4 kW 3501 kWh 2100 kWh 1400 kWh £532 £140 £672 £10,238 15.2 yrs £3,203
5 kW 4376 kWh 2625 kWh 1750 kWh £665 £175 £840 £12,273 14.6 yrs £4,529
6 kW 5251 kWh 3151 kWh 2100 kWh £798 £210 £1,008 £14,307 14.2 yrs £5,855
7 kW 6126 kWh 3676 kWh 2450 kWh £931 £245 £1,176 £16,342 13.9 yrs £7,180
8 kW 7001 kWh 4201 kWh 2801 kWh £1,064 £280 £1,344 £18,376 13.7 yrs £8,506

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: £907, Upfront: £13,673, Break-even: 15.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1750 kWh 1225 kWh 525 kWh £310 £53 £363 £7,569 20.9 yrs £-312
3 kW 2625 kWh 1838 kWh 788 kWh £466 £79 £544 £9,604 17.6 yrs £1,282
4 kW 3501 kWh 2450 kWh 1050 kWh £621 £105 £726 £11,638 16.0 yrs £2,876
5 kW 4376 kWh 3063 kWh 1313 kWh £776 £131 £907 £13,673 15.1 yrs £4,470
6 kW 5251 kWh 3676 kWh 1575 kWh £931 £158 £1,089 £15,707 14.4 yrs £6,064
7 kW 6126 kWh 4288 kWh 1838 kWh £1,086 £184 £1,270 £17,742 14.0 yrs £7,659
8 kW 7001 kWh 4901 kWh 2100 kWh £1,241 £210 £1,451 £19,776 13.6 yrs £9,253

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: £927, Upfront: £15,423, Break-even: 16.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1750 kWh 1278 kWh 473 kWh £324 £47 £371 £9,319 25.1 yrs £-1,901
3 kW 2625 kWh 1917 kWh 709 kWh £485 £71 £556 £11,354 20.4 yrs £-226
4 kW 3501 kWh 2555 kWh 945 kWh £647 £95 £742 £13,388 18.0 yrs £1,448
5 kW 4376 kWh 3194 kWh 1181 kWh £809 £118 £927 £15,423 16.6 yrs £3,123
6 kW 5251 kWh 3833 kWh 1418 kWh £971 £142 £1,113 £17,457 15.7 yrs £4,797
7 kW 6126 kWh 4472 kWh 1654 kWh £1,133 £165 £1,298 £19,492 15.0 yrs £6,472
8 kW 7001 kWh 5111 kWh 1890 kWh £1,295 £189 £1,484 £21,526 14.5 yrs £8,147

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: £941, Upfront: £17,173, Break-even: 18.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1750 kWh 1313 kWh 438 kWh £333 £44 £376 £11,069 29.4 yrs £-3,544
3 kW 2625 kWh 1969 kWh 656 kWh £499 £66 £564 £13,104 23.2 yrs £-1,815
4 kW 3501 kWh 2625 kWh 875 kWh £665 £88 £753 £15,138 20.1 yrs £-87
5 kW 4376 kWh 3282 kWh 1094 kWh £831 £109 £941 £17,173 18.3 yrs £1,641
6 kW 5251 kWh 3938 kWh 1313 kWh £998 £131 £1,129 £19,207 17.0 yrs £3,369
7 kW 6126 kWh 4595 kWh 1532 kWh £1,164 £153 £1,317 £21,242 16.1 yrs £5,098
8 kW 7001 kWh 5251 kWh 1750 kWh £1,330 £175 £1,505 £23,276 15.5 yrs £6,826

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: £954, Upfront: £19,623, Break-even: 20.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1750 kWh 1348 kWh 403 kWh £341 £40 £382 £13,519 35.4 yrs £-5,886
3 kW 2625 kWh 2022 kWh 604 kWh £512 £60 £572 £15,554 27.2 yrs £-4,104
4 kW 3501 kWh 2695 kWh 805 kWh £683 £81 £763 £17,588 23.0 yrs £-2,322
5 kW 4376 kWh 3369 kWh 1006 kWh £853 £101 £954 £19,623 20.6 yrs £-540
6 kW 5251 kWh 4043 kWh 1208 kWh £1,024 £121 £1,145 £21,657 18.9 yrs £1,241
7 kW 6126 kWh 4717 kWh 1409 kWh £1,195 £141 £1,336 £23,692 17.7 yrs £3,023
8 kW 7001 kWh 5391 kWh 1610 kWh £1,366 £161 £1,527 £25,726 16.9 yrs £4,805

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 HX7

Figures below are tailored to HX7 — click through for full league tables.

Big-Roof Britain Rank #1186 of 2182
4.9 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #2672 of 2997
12.6 years (UK avg 11.3 years)
~£807 /yr • £10,173 upfront
Standing-Charge Drag Rank #2400 of 2997
26.5% (UK avg 21.7%) drag on savings
£214 fixed • ~£807 /yr value

Your Area at a Glance

Your Electricity Rate
25.33p/kWh
Daily Fixed Charge
58.65p/day
Local Sunshine
875kWh/kW
A 1 kW system generates ~875 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: 73% • Flats: 18% • Bungalows: 5% Based on 3,620 properties

Coverage

Calderdale (100%)

Areas Covered

Calder, Luddendenfoot

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 Yorkshire

OL14 (Calderdale)
≈6.4 km away
Local sunshine: ~822 kWh/kWp · -6% vs HX7
HX6 (Calderdale)
≈7.1 km away
Local sunshine: ~891 kWh/kWp · +2% vs HX7
HX2 (Calderdale)
≈7.6 km away
Local sunshine: ~905 kWh/kWp · +3% vs HX7
HX1 (Calderdale)
≈10.0 km away
Local sunshine: ~902 kWh/kWp · +3% vs HX7
HX3 (Calderdale)
≈10.6 km away
Local sunshine: ~903 kWh/kWp · +3% vs HX7
HX4 (Calderdale)
≈11.4 km away
Local sunshine: ~888 kWh/kWp · +1% vs HX7

Similar sunshine across the UK

LL44 (Gwynedd)
~875 kWh/kWp · -0% vs HX7
SK8 (Stockport)
~875 kWh/kWp · +0% vs HX7
DG11 (Dumfries and Galloway)
~875 kWh/kWp · +0% vs HX7