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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in CH61 (Wirral)

See if solar pays off for you in Wirral — 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
12.5 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£979
What you save every year
Profit Over 25 Years
£12,260
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 Wales and Mersey, the current unit rate is 27.72p/kWh with a 69.95p/day standing charge. Your postcode’s south-facing sunshine yield is 955 kWh/kW — 25 above the regional median (930).

Read the full story

A typical roof here lands around 6.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 955 kWh per year on a south-facing roof. We value self-used electricity at 27.7p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
27.7p/kWh
Standing charge
70.0p/day
Sunshine yield (south)
955 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: £816, Upfront: £10,173, Break-even: 12.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1909 kWh 764 kWh 1145 kWh £212 £115 £326 £4,069 12.5 yrs £2,455
3 kW 2864 kWh 1145 kWh 1718 kWh £318 £172 £489 £6,104 12.5 yrs £3,683
4 kW 3818 kWh 1527 kWh 2291 kWh £423 £229 £652 £8,138 12.5 yrs £4,911
5 kW 4773 kWh 1909 kWh 2864 kWh £529 £286 £816 £10,173 12.5 yrs £6,139
6 kW 5727 kWh 2291 kWh 3436 kWh £635 £344 £979 £12,207 12.5 yrs £7,366
7 kW 6682 kWh 2673 kWh 4009 kWh £741 £401 £1,142 £14,242 12.5 yrs £8,594
8 kW 7636 kWh 3055 kWh 4582 kWh £847 £458 £1,305 £16,276 12.5 yrs £9,822

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: £985, Upfront: £12,273, Break-even: 12.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1909 kWh 1145 kWh 764 kWh £318 £76 £394 £6,169 15.7 yrs £1,709
3 kW 2864 kWh 1718 kWh 1145 kWh £476 £115 £591 £8,204 13.9 yrs £3,613
4 kW 3818 kWh 2291 kWh 1527 kWh £635 £153 £788 £10,238 13.0 yrs £5,517
5 kW 4773 kWh 2864 kWh 1909 kWh £794 £191 £985 £12,273 12.5 yrs £7,422
6 kW 5727 kWh 3436 kWh 2291 kWh £953 £229 £1,182 £14,307 12.1 yrs £9,326
7 kW 6682 kWh 4009 kWh 2673 kWh £1,111 £267 £1,379 £16,342 11.9 yrs £11,230
8 kW 7636 kWh 4582 kWh 3055 kWh £1,270 £305 £1,576 £18,376 11.7 yrs £13,134

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: £1,069, Upfront: £13,673, Break-even: 12.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1909 kWh 1336 kWh 573 kWh £370 £57 £428 £7,569 17.7 yrs £985
3 kW 2864 kWh 2005 kWh 859 kWh £556 £86 £642 £9,604 15.0 yrs £3,228
4 kW 3818 kWh 2673 kWh 1145 kWh £741 £115 £855 £11,638 13.6 yrs £5,470
5 kW 4773 kWh 3341 kWh 1432 kWh £926 £143 £1,069 £13,673 12.8 yrs £7,713
6 kW 5727 kWh 4009 kWh 1718 kWh £1,111 £172 £1,283 £15,707 12.2 yrs £9,956
7 kW 6682 kWh 4677 kWh 2005 kWh £1,297 £200 £1,497 £17,742 11.9 yrs £12,198
8 kW 7636 kWh 5345 kWh 2291 kWh £1,482 £229 £1,711 £19,776 11.6 yrs £14,441

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: £1,095, Upfront: £15,423, Break-even: 14.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1909 kWh 1394 kWh 515 kWh £386 £52 £438 £9,319 21.3 yrs £-562
3 kW 2864 kWh 2090 kWh 773 kWh £579 £77 £657 £11,354 17.3 yrs £1,782
4 kW 3818 kWh 2787 kWh 1031 kWh £773 £103 £876 £13,388 15.3 yrs £4,126
5 kW 4773 kWh 3484 kWh 1289 kWh £966 £129 £1,095 £15,423 14.1 yrs £6,470
6 kW 5727 kWh 4181 kWh 1546 kWh £1,159 £155 £1,314 £17,457 13.3 yrs £8,814
7 kW 6682 kWh 4878 kWh 1804 kWh £1,352 £180 £1,533 £19,492 12.7 yrs £11,159
8 kW 7636 kWh 5575 kWh 2062 kWh £1,545 £206 £1,751 £21,526 12.3 yrs £13,503

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: £1,112, Upfront: £17,173, Break-even: 15.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1909 kWh 1432 kWh 477 kWh £397 £48 £445 £11,069 24.9 yrs £-2,177
3 kW 2864 kWh 2148 kWh 716 kWh £595 £72 £667 £13,104 19.6 yrs £235
4 kW 3818 kWh 2864 kWh 955 kWh £794 £95 £889 £15,138 17.0 yrs £2,647
5 kW 4773 kWh 3580 kWh 1193 kWh £992 £119 £1,112 £17,173 15.4 yrs £5,059
6 kW 5727 kWh 4295 kWh 1432 kWh £1,191 £143 £1,334 £19,207 14.4 yrs £7,470
7 kW 6682 kWh 5011 kWh 1670 kWh £1,389 £167 £1,556 £21,242 13.6 yrs £9,882
8 kW 7636 kWh 5727 kWh 1909 kWh £1,588 £191 £1,778 £23,276 13.1 yrs £12,294

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: £1,128, Upfront: £19,623, Break-even: 17.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1909 kWh 1470 kWh 439 kWh £407 £44 £451 £13,519 29.9 yrs £-4,491
3 kW 2864 kWh 2205 kWh 659 kWh £611 £66 £677 £15,554 23.0 yrs £-2,012
4 kW 3818 kWh 2940 kWh 878 kWh £815 £88 £903 £17,588 19.5 yrs £468
5 kW 4773 kWh 3675 kWh 1098 kWh £1,019 £110 £1,128 £19,623 17.4 yrs £2,947
6 kW 5727 kWh 4410 kWh 1317 kWh £1,222 £132 £1,354 £21,657 16.0 yrs £5,426
7 kW 6682 kWh 5145 kWh 1537 kWh £1,426 £154 £1,580 £23,692 15.0 yrs £7,906
8 kW 7636 kWh 5880 kWh 1756 kWh £1,630 £176 £1,806 £25,726 14.2 yrs £10,385

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 CH61

Figures below are tailored to CH61 — click through for full league tables.

Big-Roof Britain Rank #320 of 2182
5.9 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #927 of 2997
10.8 years (UK avg 11.3 years)
~£1,131 /yr • £12,207 upfront
Standing-Charge Drag Rank #2025 of 2997
22.6% (UK avg 21.7%) drag on savings
£255 fixed • ~£1,131 /yr value

Your Area at a Glance

Your Electricity Rate
27.72p/kWh
Daily Fixed Charge
69.95p/day
Local Sunshine
955kWh/kW
A 1 kW system generates ~955 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
6.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 61% • Flats: 10% • Bungalows: 29% Based on 3,905 properties

Coverage

Wirral (100%)

Areas Covered

Pensby and Thingwall, Greasby, Frankby and Irby, Heswall, West Kirby and Thurstaston, Clatterbridge

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 Wales and Mersey

L61 (Wirral)
≈0.1 km away
Local sunshine: ~948 kWh/kWp · -1% vs CH61
CH31 (Wirral)
≈2.1 km away
Local sunshine: ~945 kWh/kWp · -1% vs CH61
CH60 (Wirral)
≈2.3 km away
Local sunshine: ~945 kWh/kWp · -1% vs CH61
L60 (Wirral)
≈2.4 km away
Local sunshine: ~945 kWh/kWp · -1% vs CH61
CH26 (Wirral)
≈2.9 km away
Local sunshine: ~945 kWh/kWp · -1% vs CH61
CH30 (Wirral)
≈3.4 km away
Local sunshine: ~945 kWh/kWp · -1% vs CH61

Similar sunshine across the UK

DY11 (Wyre Forest)
~954 kWh/kWp · -0% vs CH61
WF9 (Wakefield)
~954 kWh/kWp · -0% vs CH61
DN9 (North Lincolnshire)
~955 kWh/kWp · +0% vs CH61