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Solar panel cost in Sefton (L30)

See realistic solar installation costs, savings and payback for L30 (Sefton) in under a minute using official UK data. Start with the calculator, then get a no-obligation quote from an MCS-certified installer. You can also ask the SolarByPostcode assistant to sanity-check your roof, bills and plans.

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
11.3 years
After this, it's pure profit
Upfront Cost
£7,307
What you pay to get started
Annual Benefit
£644
What you save every year
Profit Over 25 Years
£8,800
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: The official cost per kW is lower above 4 kW, so a 5–6 kW system can pay back a little faster than a 3–4 kW system on otherwise identical assumptions.
  • 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

Panel costs: Uses March 2026 TIC mean installation costs: £1,827/kW up to 4 kW and £1,628/kW above 4 kW.

Other costs: Battery prices are modelled at £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 27.66p/kWh with a 70.76p/day standing charge. Your postcode’s south-facing sunshine yield is 944 kWh/kW — 14 above the regional median (930).

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 944 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
70.8p/day
Sunshine yield (south)
944 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: £805, Upfront: £9,134, Break-even: 11.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1888 kWh 755 kWh 1133 kWh £209 £113 £322 £3,654 11.3 yrs £2,789
3 kW 2832 kWh 1133 kWh 1699 kWh £313 £170 £483 £5,481 11.3 yrs £4,184
4 kW 3776 kWh 1510 kWh 2266 kWh £418 £227 £644 £7,307 11.3 yrs £5,579
5 kW 4720 kWh 1888 kWh 2832 kWh £522 £283 £805 £9,134 11.3 yrs £6,974
6 kW 5664 kWh 2266 kWh 3398 kWh £627 £340 £966 £10,961 11.3 yrs £8,368
7 kW 6608 kWh 2643 kWh 3965 kWh £731 £396 £1,128 £12,788 11.3 yrs £9,763
8 kW 7552 kWh 3021 kWh 4531 kWh £836 £453 £1,289 £14,615 11.3 yrs £11,158

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £972, Upfront: £11,234, Break-even: 11.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1888 kWh 1133 kWh 755 kWh £313 £76 £389 £5,754 14.8 yrs £2,023
3 kW 2832 kWh 1699 kWh 1133 kWh £470 £113 £583 £7,581 13.0 yrs £4,085
4 kW 3776 kWh 2266 kWh 1510 kWh £627 £151 £778 £9,407 12.1 yrs £6,146
5 kW 4720 kWh 2832 kWh 1888 kWh £783 £189 £972 £11,234 11.6 yrs £8,208
6 kW 5664 kWh 3398 kWh 2266 kWh £940 £227 £1,167 £13,061 11.2 yrs £10,269
7 kW 6608 kWh 3965 kWh 2643 kWh £1,097 £264 £1,361 £14,888 10.9 yrs £12,331
8 kW 7552 kWh 4531 kWh 3021 kWh £1,253 £302 £1,555 £16,715 10.7 yrs £14,392

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £1,055, Upfront: £12,634, Break-even: 12.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1888 kWh 1322 kWh 566 kWh £366 £57 £422 £7,154 16.9 yrs £1,290
3 kW 2832 kWh 1982 kWh 850 kWh £548 £85 £633 £8,981 14.2 yrs £3,685
4 kW 3776 kWh 2643 kWh 1133 kWh £731 £113 £844 £10,807 12.8 yrs £6,080
5 kW 4720 kWh 3304 kWh 1416 kWh £914 £142 £1,055 £12,634 12.0 yrs £8,475
6 kW 5664 kWh 3965 kWh 1699 kWh £1,097 £170 £1,267 £14,461 11.4 yrs £10,870
7 kW 6608 kWh 4625 kWh 1982 kWh £1,279 £198 £1,478 £16,288 11.0 yrs £13,264
8 kW 7552 kWh 5286 kWh 2266 kWh £1,462 £227 £1,689 £18,115 10.7 yrs £15,659

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,080, Upfront: £14,384, Break-even: 13.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1888 kWh 1378 kWh 510 kWh £381 £51 £432 £8,904 20.6 yrs £-260
3 kW 2832 kWh 2067 kWh 765 kWh £572 £76 £648 £10,731 16.6 yrs £2,235
4 kW 3776 kWh 2756 kWh 1019 kWh £762 £102 £864 £12,557 14.5 yrs £4,730
5 kW 4720 kWh 3445 kWh 1274 kWh £953 £127 £1,080 £14,384 13.3 yrs £7,225
6 kW 5664 kWh 4135 kWh 1529 kWh £1,144 £153 £1,297 £16,211 12.5 yrs £9,720
7 kW 6608 kWh 4824 kWh 1784 kWh £1,334 £178 £1,513 £18,038 11.9 yrs £12,215
8 kW 7552 kWh 5513 kWh 2039 kWh £1,525 £204 £1,729 £19,865 11.5 yrs £14,710

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,097, Upfront: £16,134, 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 1888 kWh 1416 kWh 472 kWh £392 £47 £439 £10,654 24.3 yrs £-1,877
3 kW 2832 kWh 2124 kWh 708 kWh £587 £71 £658 £12,481 19.0 yrs £685
4 kW 3776 kWh 2832 kWh 944 kWh £783 £94 £878 £14,307 16.3 yrs £3,247
5 kW 4720 kWh 3540 kWh 1180 kWh £979 £118 £1,097 £16,134 14.7 yrs £5,808
6 kW 5664 kWh 4248 kWh 1416 kWh £1,175 £142 £1,317 £17,961 13.6 yrs £8,370
7 kW 6608 kWh 4956 kWh 1652 kWh £1,371 £165 £1,536 £19,788 12.9 yrs £10,931
8 kW 7552 kWh 5664 kWh 1888 kWh £1,567 £189 £1,755 £21,615 12.3 yrs £13,493

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,114, Upfront: £18,584, Break-even: 16.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1888 kWh 1454 kWh 434 kWh £402 £43 £446 £13,104 29.4 yrs £-4,193
3 kW 2832 kWh 2181 kWh 651 kWh £603 £65 £668 £14,931 22.3 yrs £-1,565
4 kW 3776 kWh 2907 kWh 868 kWh £804 £87 £891 £16,757 18.8 yrs £1,063
5 kW 4720 kWh 3634 kWh 1086 kWh £1,005 £109 £1,114 £18,584 16.7 yrs £3,692
6 kW 5664 kWh 4361 kWh 1303 kWh £1,206 £130 £1,337 £20,411 15.3 yrs £6,320
7 kW 6608 kWh 5088 kWh 1520 kWh £1,407 £152 £1,559 £22,238 14.3 yrs £8,948
8 kW 7552 kWh 5815 kWh 1737 kWh £1,608 £174 £1,782 £24,065 13.5 yrs £11,576

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, 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.

Before you request quotes in Sefton

Use the numbers above to sanity-check installer quotes. The main things to compare are system size, battery assumptions, payback claims, MCS certification, DNO paperwork and export assumptions.

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Understand DNO, G98 and G99 export limits

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Insights for L30

Figures below are tailored to L30 — click through for full league tables.

Big-Roof Britain Rank #1459 of 2182
4.7 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #2221 of 2996
11.3 years (UK avg 10.8 years)
~£644 /yr • £7,307 upfront
Standing-Charge Drag Rank #2860 of 2996
40.1% (UK avg 26.6%) drag on savings
£258 fixed • ~£644 /yr value
Aspect Penalty View ranking →
East −20.3% West −22.0%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in L30

Monthly generation per kilowatt of solar panels

kWh 32 Jan 51 Feb 84 Mar 111 Apr 122 May 116 Jun 115 Jul 104 Aug 85 Sep 58 Oct 38 Nov 28 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 46.7% of an average month (Dec–Feb)

Best / worst month: May / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 37 kWh per month; the average month produces around 79 kWh. So a typical 4 kW home system would generate roughly 147 kWh in winter, or 315 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
944kWh/kW
A 1 kW system generates ~944 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: 22% • Bungalows: 4% Based on 5,176 properties

Coverage

Sefton (100%)

Areas Covered

Netherton and Orrell, St Oswald, Ford, Litherland, Linacre, Molyneux, Park, Manor + 2 more

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q3 2026

Installation costs: DESNZ/MCS data, March 2026 (TIC)

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

L72 (Sefton)
≈1.4 km away
Local sunshine: ~953 kWh/kWp · +1% vs L30
L80 (Sefton)
≈1.6 km away
Local sunshine: ~944 kWh/kWp · -0% vs L30
L68 (Sefton)
≈2.5 km away
Local sunshine: ~944 kWh/kWp · -0% vs L30
L21 (Sefton)
≈2.6 km away
Local sunshine: ~944 kWh/kWp · -0% vs L30
L9 (Liverpool)
≈2.6 km away
Local sunshine: ~944 kWh/kWp · -0% vs L30
L29 (Sefton)
≈2.7 km away
Local sunshine: ~944 kWh/kWp · +0% vs L30

Similar sunshine across the UK

TS29 (County Durham)
~944 kWh/kWp · -0% vs L30
S97 (Rotherham)
~944 kWh/kWp · -0% vs L30
S63 (Rotherham)
~944 kWh/kWp · +0% vs L30