Solar explained to clever people by people who are not trying to be clever

Solar Panels in HD4 (Kirklees)

See if solar pays off for you in Kirklees — 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
14.3 years
After this, it's pure profit
Upfront Cost
£8,138
What you pay to get started
Annual Benefit
£568
What you save every year
Profit Over 25 Years
£6,052
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

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 880 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)
880 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: £709, Upfront: £10,173, Break-even: 14.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1759 kWh 704 kWh 1056 kWh £178 £106 £284 £4,069 14.3 yrs £1,607
3 kW 2639 kWh 1056 kWh 1583 kWh £267 £158 £426 £6,104 14.3 yrs £2,410
4 kW 3518 kWh 1407 kWh 2111 kWh £356 £211 £568 £8,138 14.3 yrs £3,214
5 kW 4398 kWh 1759 kWh 2639 kWh £446 £264 £709 £10,173 14.3 yrs £4,017
6 kW 5278 kWh 2111 kWh 3167 kWh £535 £317 £851 £12,207 14.3 yrs £4,821
7 kW 6157 kWh 2463 kWh 3694 kWh £624 £369 £993 £14,242 14.3 yrs £5,624
8 kW 7037 kWh 2815 kWh 4222 kWh £713 £422 £1,135 £16,276 14.3 yrs £6,428

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: £844, Upfront: £12,273, 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 1759 kWh 1056 kWh 704 kWh £267 £70 £338 £6,169 18.3 yrs £586
3 kW 2639 kWh 1583 kWh 1056 kWh £401 £106 £507 £8,204 16.2 yrs £1,929
4 kW 3518 kWh 2111 kWh 1407 kWh £535 £141 £675 £10,238 15.2 yrs £3,271
5 kW 4398 kWh 2639 kWh 1759 kWh £668 £176 £844 £12,273 14.5 yrs £4,614
6 kW 5278 kWh 3167 kWh 2111 kWh £802 £211 £1,013 £14,307 14.1 yrs £5,957
7 kW 6157 kWh 3694 kWh 2463 kWh £936 £246 £1,182 £16,342 13.8 yrs £7,300
8 kW 7037 kWh 4222 kWh 2815 kWh £1,069 £281 £1,351 £18,376 13.6 yrs £8,643

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: £912, Upfront: £13,673, Break-even: 15.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1759 kWh 1231 kWh 528 kWh £312 £53 £365 £7,569 20.8 yrs £-275
3 kW 2639 kWh 1847 kWh 792 kWh £468 £79 £547 £9,604 17.6 yrs £1,338
4 kW 3518 kWh 2463 kWh 1056 kWh £624 £106 £729 £11,638 16.0 yrs £2,950
5 kW 4398 kWh 3079 kWh 1319 kWh £780 £132 £912 £13,673 15.0 yrs £4,563
6 kW 5278 kWh 3694 kWh 1583 kWh £936 £158 £1,094 £15,707 14.4 yrs £6,175
7 kW 6157 kWh 4310 kWh 1847 kWh £1,092 £185 £1,276 £17,742 13.9 yrs £7,788
8 kW 7037 kWh 4926 kWh 2111 kWh £1,248 £211 £1,459 £19,776 13.6 yrs £9,400

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: £932, Upfront: £15,423, Break-even: 16.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1759 kWh 1284 kWh 475 kWh £325 £47 £373 £9,319 25.0 yrs £-1,863
3 kW 2639 kWh 1926 kWh 712 kWh £488 £71 £559 £11,354 20.3 yrs £-170
4 kW 3518 kWh 2568 kWh 950 kWh £651 £95 £746 £13,388 18.0 yrs £1,524
5 kW 4398 kWh 3211 kWh 1187 kWh £813 £119 £932 £15,423 16.5 yrs £3,217
6 kW 5278 kWh 3853 kWh 1425 kWh £976 £142 £1,118 £17,457 15.6 yrs £4,911
7 kW 6157 kWh 4495 kWh 1662 kWh £1,139 £166 £1,305 £19,492 14.9 yrs £6,604
8 kW 7037 kWh 5137 kWh 1900 kWh £1,301 £190 £1,491 £21,526 14.4 yrs £8,297

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: £945, Upfront: £17,173, Break-even: 18.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1759 kWh 1319 kWh 440 kWh £334 £44 £378 £11,069 29.3 yrs £-3,505
3 kW 2639 kWh 1979 kWh 660 kWh £501 £66 £567 £13,104 23.1 yrs £-1,758
4 kW 3518 kWh 2639 kWh 880 kWh £668 £88 £756 £15,138 20.0 yrs £-11
5 kW 4398 kWh 3299 kWh 1100 kWh £836 £110 £945 £17,173 18.2 yrs £1,737
6 kW 5278 kWh 3958 kWh 1319 kWh £1,003 £132 £1,135 £19,207 16.9 yrs £3,484
7 kW 6157 kWh 4618 kWh 1539 kWh £1,170 £154 £1,324 £21,242 16.0 yrs £5,232
8 kW 7037 kWh 5278 kWh 1759 kWh £1,337 £176 £1,513 £23,276 15.4 yrs £6,979

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: £959, Upfront: £19,623, Break-even: 20.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1759 kWh 1355 kWh 405 kWh £343 £40 £384 £13,519 35.2 yrs £-5,847
3 kW 2639 kWh 2032 kWh 607 kWh £515 £61 £575 £15,554 27.0 yrs £-4,046
4 kW 3518 kWh 2709 kWh 809 kWh £686 £81 £767 £17,588 22.9 yrs £-2,245
5 kW 4398 kWh 3386 kWh 1012 kWh £858 £101 £959 £19,623 20.5 yrs £-443
6 kW 5278 kWh 4064 kWh 1214 kWh £1,029 £121 £1,151 £21,657 18.8 yrs £1,358
7 kW 6157 kWh 4741 kWh 1416 kWh £1,201 £142 £1,343 £23,692 17.6 yrs £3,159
8 kW 7037 kWh 5418 kWh 1618 kWh £1,372 £162 £1,534 £25,726 16.8 yrs £4,960

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.

Your Area at a Glance

Your Electricity Rate
25.33p/kWh
Daily Fixed Charge
58.65p/day
Local Sunshine
880kWh/kW
A 1 kW system generates ~880 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: 77% • Flats: 14% • Bungalows: 7% Based on 8,046 properties

Coverage

Kirklees (100%)

Areas Covered

Crosland Moor and Netherton, Newsome, Golcar, Kirkburton, Almondbury, Holme Valley North, Colne Valley, Holme Valley South

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.