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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in L24 (Liverpool)

See if solar pays off for you in Liverpool — 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
13.0 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£780
What you save every year
Profit Over 25 Years
£9,338
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 913 kWh/kW — 17 below the regional median (930).

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 913 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)
913 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: £780, Upfront: £10,173, Break-even: 13.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1827 kWh 731 kWh 1096 kWh £203 £110 £312 £4,069 13.0 yrs £2,174
3 kW 2740 kWh 1096 kWh 1644 kWh £304 £164 £468 £6,104 13.0 yrs £3,261
4 kW 3654 kWh 1461 kWh 2192 kWh £405 £219 £624 £8,138 13.0 yrs £4,349
5 kW 4567 kWh 1827 kWh 2740 kWh £506 £274 £780 £10,173 13.0 yrs £5,436
6 kW 5480 kWh 2192 kWh 3288 kWh £608 £329 £936 £12,207 13.0 yrs £6,523
7 kW 6394 kWh 2558 kWh 3836 kWh £709 £384 £1,093 £14,242 13.0 yrs £7,610
8 kW 7307 kWh 2923 kWh 4384 kWh £810 £438 £1,249 £16,276 13.0 yrs £8,697

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: £942, Upfront: £12,273, Break-even: 13.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1827 kWh 1096 kWh 731 kWh £304 £73 £377 £6,169 16.4 yrs £1,369
3 kW 2740 kWh 1644 kWh 1096 kWh £456 £110 £565 £8,204 14.5 yrs £3,104
4 kW 3654 kWh 2192 kWh 1461 kWh £608 £146 £754 £10,238 13.6 yrs £4,838
5 kW 4567 kWh 2740 kWh 1827 kWh £760 £183 £942 £12,273 13.0 yrs £6,573
6 kW 5480 kWh 3288 kWh 2192 kWh £912 £219 £1,131 £14,307 12.7 yrs £8,307
7 kW 6394 kWh 3836 kWh 2558 kWh £1,063 £256 £1,319 £16,342 12.4 yrs £10,042
8 kW 7307 kWh 4384 kWh 2923 kWh £1,215 £292 £1,508 £18,376 12.2 yrs £11,776

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: £1,023, Upfront: £13,673, 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 1827 kWh 1279 kWh 548 kWh £354 £55 £409 £7,569 18.5 yrs £617
3 kW 2740 kWh 1918 kWh 822 kWh £532 £82 £614 £9,604 15.6 yrs £2,675
4 kW 3654 kWh 2558 kWh 1096 kWh £709 £110 £819 £11,638 14.2 yrs £4,733
5 kW 4567 kWh 3197 kWh 1370 kWh £886 £137 £1,023 £13,673 13.4 yrs £6,791
6 kW 5480 kWh 3836 kWh 1644 kWh £1,063 £164 £1,228 £15,707 12.8 yrs £8,850
7 kW 6394 kWh 4476 kWh 1918 kWh £1,241 £192 £1,432 £17,742 12.4 yrs £10,908
8 kW 7307 kWh 5115 kWh 2192 kWh £1,418 £219 £1,637 £19,776 12.1 yrs £12,966

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: £1,047, Upfront: £15,423, Break-even: 14.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1827 kWh 1334 kWh 493 kWh £370 £49 £419 £9,319 22.2 yrs £-939
3 kW 2740 kWh 2000 kWh 740 kWh £554 £74 £628 £11,354 18.1 yrs £1,216
4 kW 3654 kWh 2667 kWh 986 kWh £739 £99 £838 £13,388 16.0 yrs £3,371
5 kW 4567 kWh 3334 kWh 1233 kWh £924 £123 £1,047 £15,423 14.7 yrs £5,527
6 kW 5480 kWh 4001 kWh 1480 kWh £1,109 £148 £1,257 £17,457 13.9 yrs £7,682
7 kW 6394 kWh 4667 kWh 1726 kWh £1,294 £173 £1,466 £19,492 13.3 yrs £9,838
8 kW 7307 kWh 5334 kWh 1973 kWh £1,479 £197 £1,676 £21,526 12.8 yrs £11,993

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: £1,064, Upfront: £17,173, 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 1827 kWh 1370 kWh 457 kWh £380 £46 £425 £11,069 26.0 yrs £-2,560
3 kW 2740 kWh 2055 kWh 685 kWh £570 £69 £638 £13,104 20.5 yrs £-340
4 kW 3654 kWh 2740 kWh 913 kWh £760 £91 £851 £15,138 17.8 yrs £1,880
5 kW 4567 kWh 3425 kWh 1142 kWh £949 £114 £1,064 £17,173 16.1 yrs £4,101
6 kW 5480 kWh 4110 kWh 1370 kWh £1,139 £137 £1,276 £19,207 15.0 yrs £6,321
7 kW 6394 kWh 4795 kWh 1598 kWh £1,329 £160 £1,489 £21,242 14.3 yrs £8,541
8 kW 7307 kWh 5480 kWh 1827 kWh £1,519 £183 £1,702 £23,276 13.7 yrs £10,761

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: £1,080, Upfront: £19,623, 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 1827 kWh 1407 kWh 420 kWh £390 £42 £432 £13,519 31.3 yrs £-4,880
3 kW 2740 kWh 2110 kWh 630 kWh £585 £63 £648 £15,554 24.0 yrs £-2,595
4 kW 3654 kWh 2813 kWh 840 kWh £780 £84 £864 £17,588 20.4 yrs £-311
5 kW 4567 kWh 3517 kWh 1050 kWh £975 £105 £1,080 £19,623 18.2 yrs £1,974
6 kW 5480 kWh 4220 kWh 1260 kWh £1,170 £126 £1,296 £21,657 16.7 yrs £4,259
7 kW 6394 kWh 4923 kWh 1471 kWh £1,365 £147 £1,512 £23,692 15.7 yrs £6,544
8 kW 7307 kWh 5627 kWh 1681 kWh £1,560 £168 £1,728 £25,726 14.9 yrs £8,829

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 L24

Figures below are tailored to L24 — click through for full league tables.

Big-Roof Britain Rank #1356 of 2182
4.8 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #1601 of 2997
11.3 years (UK avg 11.3 years)
~£902 /yr • £10,173 upfront
Standing-Charge Drag Rank #2586 of 2997
28.3% (UK avg 21.7%) drag on savings
£255 fixed • ~£902 /yr value

Your Area at a Glance

Your Electricity Rate
27.72p/kWh
Daily Fixed Charge
69.95p/day
Local Sunshine
913kWh/kW
A 1 kW system generates ~913 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: 83% • Flats: 11% • Bungalows: 6% Based on 6,217 properties

Coverage

Liverpool (87%)|Halton (12%)|Knowsley (1%)

Areas Covered

Speke, Ditton, Hale Village & Halebank, Much Woolton & Hunts Cross, Garston, Halewood 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.

Compare nearby areas

Nearby in North Wales and Mersey

L26 (Knowsley)
≈2.6 km away
Local sunshine: ~915 kWh/kWp · +0% vs L24
L25 (Liverpool)
≈4.0 km away
Local sunshine: ~921 kWh/kWp · +1% vs L24
L19 (Liverpool)
≈4.3 km away
Local sunshine: ~920 kWh/kWp · +1% vs L24
L27 (Liverpool)
≈5.0 km away
Local sunshine: ~921 kWh/kWp · +1% vs L24
WA88 (Halton)
≈5.7 km away
Local sunshine: ~912 kWh/kWp · -0% vs L24
L18 (Liverpool)
≈6.1 km away
Local sunshine: ~920 kWh/kWp · +1% vs L24

Similar sunshine across the UK

TD10 (Scottish Borders)
~913 kWh/kWp · +0% vs L24
EH39 (East Lothian)
~914 kWh/kWp · +0% vs L24
DD9 (Angus)
~913 kWh/kWp · -0% vs L24