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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in HX3 (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
14.0 years
After this, it's pure profit
Upfront Cost
£8,138
What you pay to get started
Annual Benefit
£583
What you save every year
Profit Over 25 Years
£6,436
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 903 kWh/kW — 26 below the regional median (929).

Read the full story

A typical roof here lands around 4.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 903 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)
903 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: £729, 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 1807 kWh 723 kWh 1084 kWh £183 £108 £291 £4,069 14.0 yrs £1,761
3 kW 2710 kWh 1084 kWh 1626 kWh £275 £163 £437 £6,104 14.0 yrs £2,641
4 kW 3614 kWh 1445 kWh 2168 kWh £366 £217 £583 £8,138 14.0 yrs £3,521
5 kW 4517 kWh 1807 kWh 2710 kWh £458 £271 £729 £10,173 14.0 yrs £4,401
6 kW 5421 kWh 2168 kWh 3252 kWh £549 £325 £874 £12,207 14.0 yrs £5,282
7 kW 6324 kWh 2530 kWh 3794 kWh £641 £379 £1,020 £14,242 14.0 yrs £6,162
8 kW 7227 kWh 2891 kWh 4336 kWh £732 £434 £1,166 £16,276 14.0 yrs £7,042

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: £867, 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 1807 kWh 1084 kWh 723 kWh £275 £72 £347 £6,169 17.8 yrs £769
3 kW 2710 kWh 1626 kWh 1084 kWh £412 £108 £520 £8,204 15.8 yrs £2,203
4 kW 3614 kWh 2168 kWh 1445 kWh £549 £145 £694 £10,238 14.8 yrs £3,637
5 kW 4517 kWh 2710 kWh 1807 kWh £687 £181 £867 £12,273 14.2 yrs £5,071
6 kW 5421 kWh 3252 kWh 2168 kWh £824 £217 £1,041 £14,307 13.7 yrs £6,506
7 kW 6324 kWh 3794 kWh 2530 kWh £961 £253 £1,214 £16,342 13.5 yrs £7,940
8 kW 7227 kWh 4336 kWh 2891 kWh £1,098 £289 £1,388 £18,376 13.2 yrs £9,374

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 1807 kWh 1265 kWh 542 kWh £320 £54 £375 £7,569 20.2 yrs £-77
3 kW 2710 kWh 1897 kWh 813 kWh £481 £81 £562 £9,604 17.1 yrs £1,634
4 kW 3614 kWh 2530 kWh 1084 kWh £641 £108 £749 £11,638 15.5 yrs £3,345
5 kW 4517 kWh 3162 kWh 1355 kWh £801 £136 £936 £13,673 14.6 yrs £5,056
6 kW 5421 kWh 3794 kWh 1626 kWh £961 £163 £1,124 £15,707 14.0 yrs £6,768
7 kW 6324 kWh 4427 kWh 1897 kWh £1,121 £190 £1,311 £17,742 13.5 yrs £8,479
8 kW 7227 kWh 5059 kWh 2168 kWh £1,281 £217 £1,498 £19,776 13.2 yrs £10,190

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 1807 kWh 1319 kWh 488 kWh £334 £49 £383 £9,319 24.3 yrs £-1,661
3 kW 2710 kWh 1978 kWh 732 kWh £501 £73 £574 £11,354 19.8 yrs £133
4 kW 3614 kWh 2638 kWh 976 kWh £668 £98 £766 £13,388 17.5 yrs £1,927
5 kW 4517 kWh 3297 kWh 1220 kWh £835 £122 £957 £15,423 16.1 yrs £3,722
6 kW 5421 kWh 3957 kWh 1464 kWh £1,002 £146 £1,149 £17,457 15.2 yrs £5,516
7 kW 6324 kWh 4616 kWh 1707 kWh £1,169 £171 £1,340 £19,492 14.5 yrs £7,310
8 kW 7227 kWh 5276 kWh 1951 kWh £1,336 £195 £1,532 £21,526 14.1 yrs £9,105

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: £971, 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 1807 kWh 1355 kWh 452 kWh £343 £45 £388 £11,069 28.5 yrs £-3,301
3 kW 2710 kWh 2033 kWh 678 kWh £515 £68 £583 £13,104 22.5 yrs £-1,451
4 kW 3614 kWh 2710 kWh 903 kWh £687 £90 £777 £15,138 19.5 yrs £399
5 kW 4517 kWh 3388 kWh 1129 kWh £858 £113 £971 £17,173 17.7 yrs £2,249
6 kW 5421 kWh 4065 kWh 1355 kWh £1,030 £136 £1,165 £19,207 16.5 yrs £4,098
7 kW 6324 kWh 4743 kWh 1581 kWh £1,201 £158 £1,359 £21,242 15.6 yrs £5,948
8 kW 7227 kWh 5421 kWh 1807 kWh £1,373 £181 £1,554 £23,276 15.0 yrs £7,798

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: £985, 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 1807 kWh 1391 kWh 416 kWh £352 £42 £394 £13,519 34.3 yrs £-5,640
3 kW 2710 kWh 2087 kWh 623 kWh £529 £62 £591 £15,554 26.3 yrs £-3,735
4 kW 3614 kWh 2783 kWh 831 kWh £705 £83 £788 £17,588 22.3 yrs £-1,829
5 kW 4517 kWh 3478 kWh 1039 kWh £881 £104 £985 £19,623 19.9 yrs £76
6 kW 5421 kWh 4174 kWh 1247 kWh £1,057 £125 £1,182 £21,657 18.3 yrs £1,981
7 kW 6324 kWh 4869 kWh 1455 kWh £1,233 £145 £1,379 £23,692 17.2 yrs £3,886
8 kW 7227 kWh 5565 kWh 1662 kWh £1,410 £166 £1,576 £25,726 16.3 yrs £5,791

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 HX3

Figures below are tailored to HX3 — click through for full league tables.

Big-Roof Britain Rank #1830 of 2182
4.4 kWp (UK avg 5.1 kWp)
~9 panels (≈430 W)
Solar Payback Index Rank #2489 of 2997
12.2 years (UK avg 11.3 years)
~£666 /yr • £8,138 upfront
Standing-Charge Drag Rank #2719 of 2997
32.1% (UK avg 21.7%) drag on savings
£214 fixed • ~£666 /yr value

Your Area at a Glance

Your Electricity Rate
25.33p/kWh
Daily Fixed Charge
58.65p/day
Local Sunshine
903kWh/kW
A 1 kW system generates ~903 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
4.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 73% • Flats: 16% • Bungalows: 8% Based on 13,318 properties

Coverage

Calderdale (100%)

Areas Covered

Town, Northowram and Shelf, Hipperholme and Lightcliffe, Skircoat, Ovenden, Sowerby Bridge, Illingworth and Mixenden, Brighouse + 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 Yorkshire

HX1 (Calderdale)
≈0.9 km away
Local sunshine: ~902 kWh/kWp · -0% vs HX3
HX2 (Calderdale)
≈3.1 km away
Local sunshine: ~905 kWh/kWp · +0% vs HX3
HX5 (Calderdale)
≈4.9 km away
Local sunshine: ~901 kWh/kWp · -0% vs HX3
HX6 (Calderdale)
≈5.1 km away
Local sunshine: ~891 kWh/kWp · -1% vs HX3
HD6 (Calderdale)
≈5.6 km away
Local sunshine: ~908 kWh/kWp · +1% vs HX3
HX4 (Calderdale)
≈5.8 km away
Local sunshine: ~888 kWh/kWp · -2% vs HX3

Similar sunshine across the UK

TD3 (Scottish Borders)
~903 kWh/kWp · -0% vs HX3
NE44 (Northumberland)
~904 kWh/kWp · +0% vs HX3
WA3 (Warrington)
~903 kWh/kWp · -0% vs HX3