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Solar panel cost in Chichester (PO20)

See realistic solar installation costs, savings and payback for PO20 (Chichester) 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
11.8 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£1,033
What you save every year
Profit Over 25 Years
£13,616
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 Southern, the current unit rate is 23.36p/kWh with a 49.69p/day standing charge. Your postcode’s south-facing sunshine yield is 1122 kWh/kW — 121 above the regional median (1001).

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 1122 kWh per year on a south-facing roof. We value self-used electricity at 23.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
23.4p/kWh
Standing charge
49.7p/day
Sunshine yield (south)
1122 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: £861, Upfront: £10,173, 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 2244 kWh 898 kWh 1346 kWh £210 £135 £344 £4,069 11.8 yrs £2,817
3 kW 3366 kWh 1346 kWh 2020 kWh £315 £202 £516 £6,104 11.8 yrs £4,226
4 kW 4488 kWh 1795 kWh 2693 kWh £419 £269 £689 £8,138 11.8 yrs £5,634
5 kW 5610 kWh 2244 kWh 3366 kWh £524 £337 £861 £10,173 11.8 yrs £7,043
6 kW 6732 kWh 2693 kWh 4039 kWh £629 £404 £1,033 £12,207 11.8 yrs £8,452
7 kW 7854 kWh 3142 kWh 4712 kWh £734 £471 £1,205 £14,242 11.8 yrs £9,860
8 kW 8976 kWh 3590 kWh 5386 kWh £839 £539 £1,377 £16,276 11.8 yrs £11,269

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: £1,011, Upfront: £12,273, 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 2244 kWh 1346 kWh 898 kWh £315 £90 £404 £6,169 15.3 yrs £1,916
3 kW 3366 kWh 2020 kWh 1346 kWh £472 £135 £606 £8,204 13.5 yrs £3,925
4 kW 4488 kWh 2693 kWh 1795 kWh £629 £180 £809 £10,238 12.7 yrs £5,933
5 kW 5610 kWh 3366 kWh 2244 kWh £786 £224 £1,011 £12,273 12.1 yrs £7,941
6 kW 6732 kWh 4039 kWh 2693 kWh £944 £269 £1,213 £14,307 11.8 yrs £9,949
7 kW 7854 kWh 4712 kWh 3142 kWh £1,101 £314 £1,415 £16,342 11.5 yrs £11,957
8 kW 8976 kWh 5386 kWh 3590 kWh £1,258 £359 £1,617 £18,376 11.4 yrs £13,966

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: £1,086, Upfront: £13,673, Break-even: 12.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2244 kWh 1571 kWh 673 kWh £367 £67 £434 £7,569 17.4 yrs £1,116
3 kW 3366 kWh 2356 kWh 1010 kWh £550 £101 £651 £9,604 14.7 yrs £3,424
4 kW 4488 kWh 3142 kWh 1346 kWh £734 £135 £869 £11,638 13.4 yrs £5,732
5 kW 5610 kWh 3927 kWh 1683 kWh £917 £168 £1,086 £13,673 12.6 yrs £8,040
6 kW 6732 kWh 4712 kWh 2020 kWh £1,101 £202 £1,303 £15,707 12.1 yrs £10,348
7 kW 7854 kWh 5498 kWh 2356 kWh £1,284 £236 £1,520 £17,742 11.7 yrs £12,656
8 kW 8976 kWh 6283 kWh 2693 kWh £1,468 £269 £1,737 £19,776 11.4 yrs £14,964

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: £1,108, Upfront: £15,423, Break-even: 13.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2244 kWh 1638 kWh 606 kWh £383 £61 £443 £9,319 21.0 yrs £-454
3 kW 3366 kWh 2457 kWh 909 kWh £574 £91 £665 £11,354 17.1 yrs £1,944
4 kW 4488 kWh 3276 kWh 1212 kWh £765 £121 £886 £13,388 15.1 yrs £4,342
5 kW 5610 kWh 4095 kWh 1515 kWh £957 £151 £1,108 £15,423 13.9 yrs £6,740
6 kW 6732 kWh 4914 kWh 1818 kWh £1,148 £182 £1,330 £17,457 13.1 yrs £9,138
7 kW 7854 kWh 5733 kWh 2121 kWh £1,339 £212 £1,551 £19,492 12.6 yrs £11,536
8 kW 8976 kWh 6552 kWh 2423 kWh £1,531 £242 £1,773 £21,526 12.1 yrs £13,934

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: £1,123, Upfront: £17,173, Break-even: 15.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2244 kWh 1683 kWh 561 kWh £393 £56 £449 £11,069 24.6 yrs £-2,084
3 kW 3366 kWh 2524 kWh 841 kWh £590 £84 £674 £13,104 19.4 yrs £374
4 kW 4488 kWh 3366 kWh 1122 kWh £786 £112 £898 £15,138 16.8 yrs £2,832
5 kW 5610 kWh 4207 kWh 1402 kWh £983 £140 £1,123 £17,173 15.3 yrs £5,289
6 kW 6732 kWh 5049 kWh 1683 kWh £1,179 £168 £1,348 £19,207 14.3 yrs £7,747
7 kW 7854 kWh 5890 kWh 1963 kWh £1,376 £196 £1,572 £21,242 13.5 yrs £10,205
8 kW 8976 kWh 6732 kWh 2244 kWh £1,573 £224 £1,797 £23,276 13.0 yrs £12,663

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: £1,138, Upfront: £19,623, Break-even: 17.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2244 kWh 1728 kWh 516 kWh £404 £52 £455 £13,519 29.7 yrs £-4,414
3 kW 3366 kWh 2592 kWh 774 kWh £605 £77 £683 £15,554 22.8 yrs £-1,896
4 kW 4488 kWh 3456 kWh 1032 kWh £807 £103 £910 £17,588 19.3 yrs £621
5 kW 5610 kWh 4320 kWh 1290 kWh £1,009 £129 £1,138 £19,623 17.2 yrs £3,139
6 kW 6732 kWh 5184 kWh 1548 kWh £1,211 £155 £1,366 £21,657 15.9 yrs £5,657
7 kW 7854 kWh 6047 kWh 1806 kWh £1,413 £181 £1,593 £23,692 14.9 yrs £8,175
8 kW 8976 kWh 6911 kWh 2064 kWh £1,615 £206 £1,821 £25,726 14.1 yrs £10,693

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 PO20

Figures below are tailored to PO20 — click through for full league tables.

Big-Roof Britain Rank #519 of 2182
5.6 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #50 of 2997
10.6 years (UK avg 12.6 years)
~£1,153 /yr • £12,207 upfront
Standing-Charge Drag Rank #3 of 2997
14.5% (UK avg 24.6%) drag on savings
£167 fixed • ~£1,153 /yr value
Aspect Penalty View ranking →
East −21.2% West −23.1%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in PO20

Monthly generation per kilowatt of solar panels

kWh 41 Jan 57 Feb 96 Mar 128 Apr 136 May 139 Jun 141 Jul 122 Aug 104 Sep 71 Oct 49 Nov 37 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 48.0% of an average month (Dec–Feb)

Best / worst month: Jul / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 45 kWh per month; the average month produces around 93 kWh. So a typical 4 kW home system would generate roughly 180 kWh in winter, or 374 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
23.36p/kWh
Daily Fixed Charge
49.69p/day
Local Sunshine
1122kWh/kW
A 1 kW system generates ~1122 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: 62% • Flats: 15% • Bungalows: 21% Based on 11,215 properties

Coverage

Chichester (86%)|Arun (14%)

Areas Covered

North Mundham & Tangmere, The Witterings, Selsey South, Barnham, Sidlesham with Selsey North, Chichester Central, Arundel & Walberton, Harbour Villages + 1 more

Data Sources & Assumptions

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

Electricity rates: Ofgem price cap, Q1 2026

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 Southern

PO19 (Chichester)
≈3.0 km away
Local sunshine: ~1,138 kWh/kWp · +1% vs PO20
PO18 (Chichester)
≈6.0 km away
Local sunshine: ~1,108 kWh/kWp · -1% vs PO20
PO21 (Arun)
≈7.1 km away
Local sunshine: ~1,111 kWh/kWp · -1% vs PO20
PO22 (Arun)
≈9.5 km away
Local sunshine: ~1,128 kWh/kWp · +1% vs PO20
PO10 (Havant)
≈11.8 km away
Local sunshine: ~1,133 kWh/kWp · +1% vs PO20
PO11 (Havant)
≈14.2 km away
Local sunshine: ~1,096 kWh/kWp · -2% vs PO20

Similar sunshine across the UK

BN10 (Lewes)
~1,123 kWh/kWp · +0% vs PO20
TN29 (Folkestone and Hythe)
~1,123 kWh/kWp · +0% vs PO20
BN12 (Worthing)
~1,123 kWh/kWp · +0% vs PO20