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Solar panel cost in Sefton (L10)

See realistic solar installation costs, savings and payback for L10 (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
11.5 years
After this, it's pure profit
Upfront Cost
£7,307
What you pay to get started
Annual Benefit
£635
What you save every year
Profit Over 25 Years
£8,577
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 931 kWh/kW — 1 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 931 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)
931 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: £794, Upfront: £9,134, Break-even: 11.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1862 kWh 745 kWh 1117 kWh £206 £112 £318 £3,654 11.5 yrs £2,700
3 kW 2793 kWh 1117 kWh 1676 kWh £309 £168 £477 £5,481 11.5 yrs £4,050
4 kW 3724 kWh 1489 kWh 2234 kWh £412 £223 £635 £7,307 11.5 yrs £5,400
5 kW 4654 kWh 1862 kWh 2793 kWh £515 £279 £794 £9,134 11.5 yrs £6,751
6 kW 5585 kWh 2234 kWh 3351 kWh £618 £335 £953 £10,961 11.5 yrs £8,101
7 kW 6516 kWh 2606 kWh 3910 kWh £721 £391 £1,112 £12,788 11.5 yrs £9,451
8 kW 7447 kWh 2979 kWh 4468 kWh £824 £447 £1,271 £14,615 11.5 yrs £10,801

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: £959, Upfront: £11,234, Break-even: 11.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1862 kWh 1117 kWh 745 kWh £309 £74 £383 £5,754 15.0 yrs £1,915
3 kW 2793 kWh 1676 kWh 1117 kWh £463 £112 £575 £7,581 13.2 yrs £3,923
4 kW 3724 kWh 2234 kWh 1489 kWh £618 £149 £767 £9,407 12.3 yrs £5,931
5 kW 4654 kWh 2793 kWh 1862 kWh £772 £186 £959 £11,234 11.7 yrs £7,938
6 kW 5585 kWh 3351 kWh 2234 kWh £927 £223 £1,150 £13,061 11.4 yrs £9,946
7 kW 6516 kWh 3910 kWh 2606 kWh £1,081 £261 £1,342 £14,888 11.1 yrs £11,954
8 kW 7447 kWh 4468 kWh 2979 kWh £1,236 £298 £1,534 £16,715 10.9 yrs £13,961

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: £1,041, Upfront: £12,634, Break-even: 12.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1862 kWh 1303 kWh 559 kWh £360 £56 £416 £7,154 17.2 yrs £1,173
3 kW 2793 kWh 1955 kWh 838 kWh £541 £84 £624 £8,981 14.4 yrs £3,509
4 kW 3724 kWh 2606 kWh 1117 kWh £721 £112 £833 £10,807 13.0 yrs £5,846
5 kW 4654 kWh 3258 kWh 1396 kWh £901 £140 £1,041 £12,634 12.1 yrs £8,182
6 kW 5585 kWh 3910 kWh 1676 kWh £1,081 £168 £1,249 £14,461 11.6 yrs £10,519
7 kW 6516 kWh 4561 kWh 1955 kWh £1,262 £195 £1,457 £16,288 11.2 yrs £12,855
8 kW 7447 kWh 5213 kWh 2234 kWh £1,442 £223 £1,665 £18,115 10.9 yrs £15,192

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: £1,065, Upfront: £14,384, Break-even: 13.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1862 kWh 1359 kWh 503 kWh £376 £50 £426 £8,904 20.9 yrs £-380
3 kW 2793 kWh 2039 kWh 754 kWh £564 £75 £639 £10,731 16.8 yrs £2,055
4 kW 3724 kWh 2718 kWh 1005 kWh £752 £101 £852 £12,557 14.7 yrs £4,490
5 kW 4654 kWh 3398 kWh 1257 kWh £940 £126 £1,065 £14,384 13.5 yrs £6,926
6 kW 5585 kWh 4077 kWh 1508 kWh £1,128 £151 £1,279 £16,211 12.7 yrs £9,361
7 kW 6516 kWh 4757 kWh 1759 kWh £1,316 £176 £1,492 £18,038 12.1 yrs £11,796
8 kW 7447 kWh 5436 kWh 2011 kWh £1,504 £201 £1,705 £19,865 11.7 yrs £14,231

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: £1,082, Upfront: £16,134, Break-even: 14.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1862 kWh 1396 kWh 465 kWh £386 £47 £433 £10,654 24.6 yrs £-1,998
3 kW 2793 kWh 2095 kWh 698 kWh £579 £70 £649 £12,481 19.2 yrs £503
4 kW 3724 kWh 2793 kWh 931 kWh £772 £93 £866 £14,307 16.5 yrs £3,003
5 kW 4654 kWh 3491 kWh 1164 kWh £966 £116 £1,082 £16,134 14.9 yrs £5,504
6 kW 5585 kWh 4189 kWh 1396 kWh £1,159 £140 £1,298 £17,961 13.8 yrs £8,005
7 kW 6516 kWh 4887 kWh 1629 kWh £1,352 £163 £1,515 £19,788 13.1 yrs £10,506
8 kW 7447 kWh 5585 kWh 1862 kWh £1,545 £186 £1,731 £21,615 12.5 yrs £13,007

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: £1,098, Upfront: £18,584, Break-even: 16.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1862 kWh 1434 kWh 428 kWh £397 £43 £439 £13,104 29.8 yrs £-4,317
3 kW 2793 kWh 2150 kWh 642 kWh £595 £64 £659 £14,931 22.7 yrs £-1,750
4 kW 3724 kWh 2867 kWh 856 kWh £793 £86 £879 £16,757 19.1 yrs £817
5 kW 4654 kWh 3584 kWh 1071 kWh £991 £107 £1,098 £18,584 16.9 yrs £3,383
6 kW 5585 kWh 4301 kWh 1285 kWh £1,190 £128 £1,318 £20,411 15.5 yrs £5,950
7 kW 6516 kWh 5017 kWh 1499 kWh £1,388 £150 £1,538 £22,238 14.5 yrs £8,516
8 kW 7447 kWh 5734 kWh 1713 kWh £1,586 £171 £1,757 £24,065 13.7 yrs £11,083

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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Check what MCS certification means

Understand DNO, G98 and G99 export limits

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Insights for L10

Figures below are tailored to L10 — click through for full league tables.

Big-Roof Britain Rank #1616 of 2182
4.6 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #2295 of 2996
11.5 years (UK avg 10.8 years)
~£635 /yr • £7,307 upfront
Standing-Charge Drag Rank #2902 of 2996
40.6% (UK avg 26.6%) drag on savings
£258 fixed • ~£635 /yr value
Aspect Penalty View ranking →
East −19.9% West −21.4%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in L10

Monthly generation per kilowatt of solar panels

kWh 30 Jan 50 Feb 82 Mar 110 Apr 121 May 115 Jun 114 Jul 104 Aug 84 Sep 57 Oct 37 Nov 27 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 46.0% 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 36 kWh per month; the average month produces around 78 kWh. So a typical 4 kW home system would generate roughly 143 kWh in winter, or 310 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
931kWh/kW
A 1 kW system generates ~931 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: 82% • Flats: 11% • Bungalows: 6% Based on 3,266 properties

Coverage

Sefton (42%)|Liverpool (39%)|Knowsley (19%)

Areas Covered

Molyneux, Fazakerley East, Cherryfield, Fazakerley West, Park

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

L9 (Liverpool)
≈1.8 km away
Local sunshine: ~944 kWh/kWp · +1% vs L10
L72 (Sefton)
≈2.2 km away
Local sunshine: ~953 kWh/kWp · +2% vs L10
L68 (Sefton)
≈2.3 km away
Local sunshine: ~944 kWh/kWp · +1% vs L10
L11 (Liverpool)
≈2.6 km away
Local sunshine: ~922 kWh/kWp · -1% vs L10
L80 (Sefton)
≈2.7 km away
Local sunshine: ~944 kWh/kWp · +1% vs L10
L32 (Knowsley)
≈2.9 km away
Local sunshine: ~922 kWh/kWp · -1% vs L10

Similar sunshine across the UK

ST15 (Stafford)
~931 kWh/kWp · +0% vs L10
WV14 (Wolverhampton)
~931 kWh/kWp · -0% vs L10
TS11 (Redcar and Cleveland)
~931 kWh/kWp · +0% vs L10