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Solar panel cost in Worthing (BN11)

See realistic solar installation costs, savings and payback for BN11 (Worthing) 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
9.8 years
After this, it's pure profit
Upfront Cost
£5,481
What you pay to get started
Annual Benefit
£560
What you save every year
Profit Over 25 Years
£8,508
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 South East, the current unit rate is 26.67p/kWh with a 54.45p/day standing charge. Your postcode’s south-facing sunshine yield is 1119 kWh/kW — 90 above the regional median (1029).

Read the full story

A typical roof here lands around 3.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 1119 kWh per year on a south-facing roof. We value self-used electricity at 26.7p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.7p/kWh
Standing charge
54.5p/day
Sunshine yield (south)
1119 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: £933, Upfront: £9,134, Break-even: 9.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2238 kWh 895 kWh 1343 kWh £239 £134 £373 £3,654 9.8 yrs £3,807
3 kW 3357 kWh 1343 kWh 2014 kWh £358 £201 £560 £5,481 9.8 yrs £5,710
4 kW 4476 kWh 1790 kWh 2686 kWh £477 £269 £746 £7,307 9.8 yrs £7,614
5 kW 5595 kWh 2238 kWh 3357 kWh £597 £336 £933 £9,134 9.8 yrs £9,517
6 kW 6714 kWh 2686 kWh 4028 kWh £716 £403 £1,119 £10,961 9.8 yrs £11,421
7 kW 7833 kWh 3133 kWh 4700 kWh £836 £470 £1,306 £12,788 9.8 yrs £13,324
8 kW 8952 kWh 3581 kWh 5371 kWh £955 £537 £1,492 £14,615 9.8 yrs £15,228

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: £1,119, Upfront: £11,234, Break-even: 10.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2238 kWh 1343 kWh 895 kWh £358 £90 £448 £5,754 12.9 yrs £3,199
3 kW 3357 kWh 2014 kWh 1343 kWh £537 £134 £671 £7,581 11.3 yrs £5,849
4 kW 4476 kWh 2686 kWh 1790 kWh £716 £179 £895 £9,407 10.5 yrs £8,498
5 kW 5595 kWh 3357 kWh 2238 kWh £895 £224 £1,119 £11,234 10.0 yrs £11,148
6 kW 6714 kWh 4028 kWh 2686 kWh £1,074 £269 £1,343 £13,061 9.7 yrs £13,798
7 kW 7833 kWh 4700 kWh 3133 kWh £1,253 £313 £1,567 £14,888 9.5 yrs £16,447
8 kW 8952 kWh 5371 kWh 3581 kWh £1,432 £358 £1,791 £16,715 9.3 yrs £19,097

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: £1,212, Upfront: £12,634, Break-even: 10.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2238 kWh 1567 kWh 671 kWh £418 £67 £485 £7,154 14.8 yrs £2,545
3 kW 3357 kWh 2350 kWh 1007 kWh £627 £101 £727 £8,981 12.3 yrs £5,568
4 kW 4476 kWh 3133 kWh 1343 kWh £836 £134 £970 £10,807 11.1 yrs £8,591
5 kW 5595 kWh 3916 kWh 1679 kWh £1,045 £168 £1,212 £12,634 10.4 yrs £11,613
6 kW 6714 kWh 4700 kWh 2014 kWh £1,253 £201 £1,455 £14,461 9.9 yrs £14,636
7 kW 7833 kWh 5483 kWh 2350 kWh £1,462 £235 £1,697 £16,288 9.6 yrs £17,659
8 kW 8952 kWh 6266 kWh 2686 kWh £1,671 £269 £1,940 £18,115 9.3 yrs £20,681

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: £1,240, Upfront: £14,384, 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 2238 kWh 1634 kWh 604 kWh £436 £60 £496 £8,904 17.9 yrs £1,019
3 kW 3357 kWh 2451 kWh 906 kWh £654 £91 £744 £10,731 14.4 yrs £4,154
4 kW 4476 kWh 3267 kWh 1209 kWh £871 £121 £992 £12,557 12.7 yrs £7,288
5 kW 5595 kWh 4084 kWh 1511 kWh £1,089 £151 £1,240 £14,384 11.6 yrs £10,423
6 kW 6714 kWh 4901 kWh 1813 kWh £1,307 £181 £1,488 £16,211 10.9 yrs £13,558
7 kW 7833 kWh 5718 kWh 2115 kWh £1,525 £211 £1,737 £18,038 10.4 yrs £16,692
8 kW 8952 kWh 6535 kWh 2417 kWh £1,743 £242 £1,985 £19,865 10.0 yrs £19,827

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: £1,259, Upfront: £16,134, Break-even: 12.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2238 kWh 1678 kWh 560 kWh £448 £56 £504 £10,654 21.2 yrs £-582
3 kW 3357 kWh 2518 kWh 839 kWh £671 £84 £755 £12,481 16.5 yrs £2,628
4 kW 4476 kWh 3357 kWh 1119 kWh £895 £112 £1,007 £14,307 14.2 yrs £5,837
5 kW 5595 kWh 4196 kWh 1399 kWh £1,119 £140 £1,259 £16,134 12.8 yrs £9,046
6 kW 6714 kWh 5036 kWh 1678 kWh £1,343 £168 £1,511 £17,961 11.9 yrs £12,255
7 kW 7833 kWh 5875 kWh 1958 kWh £1,567 £196 £1,763 £19,788 11.2 yrs £15,465
8 kW 8952 kWh 6714 kWh 2238 kWh £1,791 £224 £2,014 £21,615 10.7 yrs £18,674

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: £1,278, Upfront: £18,584, Break-even: 14.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2238 kWh 1723 kWh 515 kWh £460 £51 £511 £13,104 25.6 yrs £-2,882
3 kW 3357 kWh 2585 kWh 772 kWh £689 £77 £767 £14,931 19.5 yrs £402
4 kW 4476 kWh 3447 kWh 1029 kWh £919 £103 £1,022 £16,757 16.4 yrs £3,685
5 kW 5595 kWh 4308 kWh 1287 kWh £1,149 £129 £1,278 £18,584 14.5 yrs £6,969
6 kW 6714 kWh 5170 kWh 1544 kWh £1,379 £154 £1,533 £20,411 13.3 yrs £10,253
7 kW 7833 kWh 6031 kWh 1802 kWh £1,609 £180 £1,789 £22,238 12.4 yrs £13,537
8 kW 8952 kWh 6893 kWh 2059 kWh £1,838 £206 £2,044 £24,065 11.8 yrs £16,821

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 Worthing

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 BN11

Figures below are tailored to BN11 — click through for full league tables.

Big-Roof Britain Rank #2124 of 2182
3.8 kWp (UK avg 5.1 kWp)
~8 panels (≈430 W)
Solar Payback Index Rank #14 of 2996
8.7 years (UK avg 10.8 years)
~£1,119 /yr • £9,767 upfront
Standing-Charge Drag Rank #191 of 2996
17.8% (UK avg 26.6%) drag on savings
£199 fixed • ~£1,119 /yr value
Aspect Penalty View ranking →
East −21.0% West −22.6%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BN11

Monthly generation per kilowatt of solar panels

kWh 42 Jan 58 Feb 95 Mar 127 Apr 135 May 139 Jun 140 Jul 122 Aug 103 Sep 72 Oct 48 Nov 38 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.1% 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 46 kWh per month; the average month produces around 93 kWh. So a typical 4 kW home system would generate roughly 183 kWh in winter, or 373 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.67p/kWh
Daily Fixed Charge
54.45p/day
Local Sunshine
1119kWh/kW
A 1 kW system generates ~1119 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
3.0kW
For eligible homes in this area

⚠️ This area is predominantly flats. Many residents require freeholder approval for solar installations. System size shown reflects houses and bungalows only.

Local Property Data

Property Types

Houses: 23% • Flats: 72% • Bungalows: 2% Based on 12,942 properties

Coverage

Worthing (100%)

Areas Covered

Central, Heene, Marine, Selden, Castle, Tarring, East Preston, West Chiltington + 1 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 South East

BN14 (Worthing)
≈1.5 km away
Local sunshine: ~1,119 kWh/kWp · +0% vs BN11
BN95 (Adur)
≈3.0 km away
Local sunshine: ~1,112 kWh/kWp · -1% vs BN11
BN99 (Adur)
≈3.1 km away
Local sunshine: ~1,119 kWh/kWp · +0% vs BN11
BN13 (Worthing)
≈3.2 km away
Local sunshine: ~1,119 kWh/kWp · +0% vs BN11
BN12 (Worthing)
≈3.7 km away
Local sunshine: ~1,123 kWh/kWp · +0% vs BN11
BN15 (Adur)
≈3.7 km away
Local sunshine: ~1,112 kWh/kWp · -1% vs BN11

Similar sunshine across the UK

PO20 (Chichester)
~1,122 kWh/kWp · +0% vs BN11
TQ8 (South Hams)
~1,115 kWh/kWp · -0% vs BN11
TQ7 (South Hams)
~1,123 kWh/kWp · +0% vs BN11