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Solar panel cost in Knowsley (L32)

See realistic solar installation costs, savings and payback for L32 (Knowsley) 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
11.6 years
After this, it's pure profit
Upfront Cost
£7,307
What you pay to get started
Annual Benefit
£629
What you save every year
Profit Over 25 Years
£8,429
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 922 kWh/kW — 8 below 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 922 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)
922 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: £787, Upfront: £9,134, 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 1844 kWh 738 kWh 1107 kWh £204 £111 £315 £3,654 11.6 yrs £2,641
3 kW 2767 kWh 1107 kWh 1660 kWh £306 £166 £472 £5,481 11.6 yrs £3,961
4 kW 3689 kWh 1476 kWh 2213 kWh £408 £221 £629 £7,307 11.6 yrs £5,282
5 kW 4611 kWh 1844 kWh 2767 kWh £510 £277 £787 £9,134 11.6 yrs £6,602
6 kW 5533 kWh 2213 kWh 3320 kWh £612 £332 £944 £10,961 11.6 yrs £7,923
7 kW 6455 kWh 2582 kWh 3873 kWh £714 £387 £1,102 £12,788 11.6 yrs £9,243
8 kW 7378 kWh 2951 kWh 4427 kWh £816 £443 £1,259 £14,615 11.6 yrs £10,564

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: £950, Upfront: £11,234, Break-even: 11.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1844 kWh 1107 kWh 738 kWh £306 £74 £380 £5,754 15.1 yrs £1,844
3 kW 2767 kWh 1660 kWh 1107 kWh £459 £111 £570 £7,581 13.3 yrs £3,816
4 kW 3689 kWh 2213 kWh 1476 kWh £612 £148 £760 £9,407 12.4 yrs £5,788
5 kW 4611 kWh 2767 kWh 1844 kWh £765 £184 £950 £11,234 11.8 yrs £7,760
6 kW 5533 kWh 3320 kWh 2213 kWh £918 £221 £1,140 £13,061 11.5 yrs £9,732
7 kW 6455 kWh 3873 kWh 2582 kWh £1,071 £258 £1,330 £14,888 11.2 yrs £11,703
8 kW 7378 kWh 4427 kWh 2951 kWh £1,224 £295 £1,520 £16,715 11.0 yrs £13,675

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: £1,031, Upfront: £12,634, Break-even: 12.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1844 kWh 1291 kWh 553 kWh £357 £55 £412 £7,154 17.3 yrs £1,095
3 kW 2767 kWh 1937 kWh 830 kWh £536 £83 £619 £8,981 14.5 yrs £3,393
4 kW 3689 kWh 2582 kWh 1107 kWh £714 £111 £825 £10,807 13.1 yrs £5,691
5 kW 4611 kWh 3228 kWh 1383 kWh £893 £138 £1,031 £12,634 12.3 yrs £7,988
6 kW 5533 kWh 3873 kWh 1660 kWh £1,071 £166 £1,237 £14,461 11.7 yrs £10,286
7 kW 6455 kWh 4519 kWh 1937 kWh £1,250 £194 £1,444 £16,288 11.3 yrs £12,584
8 kW 7378 kWh 5164 kWh 2213 kWh £1,428 £221 £1,650 £18,115 11.0 yrs £14,881

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: £1,056, Upfront: £14,384, Break-even: 13.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1844 kWh 1346 kWh 498 kWh £372 £50 £422 £8,904 21.1 yrs £-459
3 kW 2767 kWh 2020 kWh 747 kWh £559 £75 £633 £10,731 16.9 yrs £1,936
4 kW 3689 kWh 2693 kWh 996 kWh £745 £100 £844 £12,557 14.9 yrs £4,331
5 kW 4611 kWh 3366 kWh 1245 kWh £931 £124 £1,056 £14,384 13.6 yrs £6,727
6 kW 5533 kWh 4039 kWh 1494 kWh £1,117 £149 £1,267 £16,211 12.8 yrs £9,122
7 kW 6455 kWh 4712 kWh 1743 kWh £1,303 £174 £1,478 £18,038 12.2 yrs £11,518
8 kW 7378 kWh 5386 kWh 1992 kWh £1,490 £199 £1,689 £19,865 11.8 yrs £13,913

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: £1,072, Upfront: £16,134, Break-even: 15.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1844 kWh 1383 kWh 461 kWh £383 £46 £429 £10,654 24.8 yrs £-2,079
3 kW 2767 kWh 2075 kWh 692 kWh £574 £69 £643 £12,481 19.4 yrs £382
4 kW 3689 kWh 2767 kWh 922 kWh £765 £92 £857 £14,307 16.7 yrs £2,842
5 kW 4611 kWh 3458 kWh 1153 kWh £957 £115 £1,072 £16,134 15.1 yrs £5,303
6 kW 5533 kWh 4150 kWh 1383 kWh £1,148 £138 £1,286 £17,961 14.0 yrs £7,763
7 kW 6455 kWh 4842 kWh 1614 kWh £1,339 £161 £1,501 £19,788 13.2 yrs £10,224
8 kW 7378 kWh 5533 kWh 1844 kWh £1,530 £184 £1,715 £21,615 12.6 yrs £12,684

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: £1,088, Upfront: £18,584, Break-even: 17.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1844 kWh 1420 kWh 424 kWh £393 £42 £435 £13,104 30.1 yrs £-4,399
3 kW 2767 kWh 2130 kWh 636 kWh £589 £64 £653 £14,931 22.9 yrs £-1,873
4 kW 3689 kWh 2840 kWh 848 kWh £786 £85 £870 £16,757 19.3 yrs £653
5 kW 4611 kWh 3551 kWh 1061 kWh £982 £106 £1,088 £18,584 17.1 yrs £3,178
6 kW 5533 kWh 4261 kWh 1273 kWh £1,178 £127 £1,306 £20,411 15.6 yrs £5,704
7 kW 6455 kWh 4971 kWh 1485 kWh £1,375 £148 £1,523 £22,238 14.6 yrs £8,230
8 kW 7378 kWh 5681 kWh 1697 kWh £1,571 £170 £1,741 £24,065 13.8 yrs £10,755

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 Knowsley

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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This is a practical sanity-check request, not an instant quote promise. The Blue Ape quote route above remains available if you already want installer introductions.

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Insights for L32

Figures below are tailored to L32 — click through for full league tables.

Big-Roof Britain Rank #1614 of 2182
4.6 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #2340 of 2996
11.6 years (UK avg 10.8 years)
~£629 /yr • £7,307 upfront
Standing-Charge Drag Rank #2918 of 2996
41.0% (UK avg 26.6%) drag on savings
£258 fixed • ~£629 /yr value
Aspect Penalty View ranking →
East −19.8% West −21.1%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in L32

Monthly generation per kilowatt of solar panels

kWh 30 Jan 49 Feb 81 Mar 108 Apr 119 May 114 Jun 114 Jul 103 Aug 83 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 35 kWh per month; the average month produces around 77 kWh. So a typical 4 kW home system would generate roughly 141 kWh in winter, or 307 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
27.66p/kWh
Daily Fixed Charge
70.76p/day
Local Sunshine
922kWh/kW
A 1 kW system generates ~922 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: 75% • Flats: 16% • Bungalows: 9% Based on 6,848 properties

Coverage

Knowsley (100%)

Areas Covered

Whitefield, Cherryfield, Northwood

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

L33 (Knowsley)
≈1.2 km away
Local sunshine: ~922 kWh/kWp · +0% vs L32
L10 (Sefton)
≈2.9 km away
Local sunshine: ~931 kWh/kWp · +1% vs L32
L11 (Liverpool)
≈4.0 km away
Local sunshine: ~922 kWh/kWp · -0% vs L32
L9 (Liverpool)
≈4.7 km away
Local sunshine: ~944 kWh/kWp · +2% vs L32
L72 (Sefton)
≈5.0 km away
Local sunshine: ~953 kWh/kWp · +3% vs L32
L28 (Knowsley)
≈5.1 km away
Local sunshine: ~926 kWh/kWp · +0% vs L32

Similar sunshine across the UK

NE8 (Gateshead)
~922 kWh/kWp · +0% vs L32
NP23 (Blaenau Gwent)
~922 kWh/kWp · +0% vs L32
LS1 (Leeds)
~922 kWh/kWp · -0% vs L32