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Solar panel cost in Worthing (BN12)

See realistic solar installation costs, savings and payback for BN12 (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
8.7 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£1,123
What you save every year
Profit Over 25 Years
£18,317
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 1123 kWh/kW — 94 above the regional median (1029).

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 1123 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)
1123 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: £936, Upfront: £8,139, Break-even: 8.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2247 kWh 899 kWh 1348 kWh £240 £135 £374 £3,256 8.7 yrs £4,234
3 kW 3370 kWh 1348 kWh 2022 kWh £359 £202 £562 £4,883 8.7 yrs £6,350
4 kW 4493 kWh 1797 kWh 2696 kWh £479 £270 £749 £6,511 8.7 yrs £8,467
5 kW 5616 kWh 2247 kWh 3370 kWh £599 £337 £936 £8,139 8.7 yrs £10,584
6 kW 6740 kWh 2696 kWh 4044 kWh £719 £404 £1,123 £9,767 8.7 yrs £12,701
7 kW 7863 kWh 3145 kWh 4718 kWh £839 £472 £1,311 £11,394 8.7 yrs £14,817
8 kW 8986 kWh 3594 kWh 5392 kWh £959 £539 £1,498 £13,022 8.7 yrs £16,934

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £1,123, Upfront: £10,239, Break-even: 9.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2247 kWh 1348 kWh 899 kWh £359 £90 £449 £5,356 11.9 yrs £3,632
3 kW 3370 kWh 2022 kWh 1348 kWh £539 £135 £674 £6,983 10.4 yrs £6,497
4 kW 4493 kWh 2696 kWh 1797 kWh £719 £180 £899 £8,611 9.6 yrs £9,363
5 kW 5616 kWh 3370 kWh 2247 kWh £899 £225 £1,123 £10,239 9.1 yrs £12,229
6 kW 6740 kWh 4044 kWh 2696 kWh £1,078 £270 £1,348 £11,867 8.8 yrs £15,095
7 kW 7863 kWh 4718 kWh 3145 kWh £1,258 £315 £1,573 £13,494 8.6 yrs £17,960
8 kW 8986 kWh 5392 kWh 3594 kWh £1,438 £359 £1,797 £15,122 8.4 yrs £20,826

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £1,217, Upfront: £11,639, Break-even: 9.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2247 kWh 1573 kWh 674 kWh £419 £67 £487 £6,756 13.9 yrs £2,981
3 kW 3370 kWh 2359 kWh 1011 kWh £629 £101 £730 £8,383 11.5 yrs £6,221
4 kW 4493 kWh 3145 kWh 1348 kWh £839 £135 £974 £10,011 10.3 yrs £9,461
5 kW 5616 kWh 3931 kWh 1685 kWh £1,049 £168 £1,217 £11,639 9.6 yrs £12,701
6 kW 6740 kWh 4718 kWh 2022 kWh £1,258 £202 £1,460 £13,267 9.1 yrs £15,942
7 kW 7863 kWh 5504 kWh 2359 kWh £1,468 £236 £1,704 £14,894 8.7 yrs £19,182
8 kW 8986 kWh 6290 kWh 2696 kWh £1,678 £270 £1,947 £16,522 8.5 yrs £22,422

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,245, Upfront: £13,389, Break-even: 10.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2247 kWh 1640 kWh 607 kWh £437 £61 £498 £8,506 17.1 yrs £1,455
3 kW 3370 kWh 2460 kWh 910 kWh £656 £91 £747 £10,133 13.6 yrs £4,808
4 kW 4493 kWh 3280 kWh 1213 kWh £875 £121 £996 £11,761 11.8 yrs £8,160
5 kW 5616 kWh 4100 kWh 1516 kWh £1,093 £152 £1,245 £13,389 10.8 yrs £11,513
6 kW 6740 kWh 4920 kWh 1820 kWh £1,312 £182 £1,494 £15,017 10.1 yrs £14,866
7 kW 7863 kWh 5740 kWh 2123 kWh £1,531 £212 £1,743 £16,644 9.5 yrs £18,218
8 kW 8986 kWh 6560 kWh 2426 kWh £1,750 £243 £1,992 £18,272 9.2 yrs £21,571

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,264, Upfront: £15,139, 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 2247 kWh 1685 kWh 562 kWh £449 £56 £506 £10,256 20.3 yrs £-145
3 kW 3370 kWh 2527 kWh 842 kWh £674 £84 £758 £11,883 15.7 yrs £3,283
4 kW 4493 kWh 3370 kWh 1123 kWh £899 £112 £1,011 £13,511 13.4 yrs £6,710
5 kW 5616 kWh 4212 kWh 1404 kWh £1,123 £140 £1,264 £15,139 12.0 yrs £10,138
6 kW 6740 kWh 5055 kWh 1685 kWh £1,348 £168 £1,517 £16,767 11.1 yrs £13,565
7 kW 7863 kWh 5897 kWh 1966 kWh £1,573 £197 £1,769 £18,394 10.4 yrs £16,993
8 kW 8986 kWh 6740 kWh 2247 kWh £1,797 £225 £2,022 £20,022 9.9 yrs £20,420

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,283, Upfront: £17,589, Break-even: 13.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2247 kWh 1730 kWh 517 kWh £461 £52 £513 £12,706 24.8 yrs £-2,445
3 kW 3370 kWh 2595 kWh 775 kWh £692 £78 £770 £14,333 18.6 yrs £1,057
4 kW 4493 kWh 3460 kWh 1033 kWh £923 £103 £1,026 £15,961 15.6 yrs £4,560
5 kW 5616 kWh 4325 kWh 1292 kWh £1,153 £129 £1,283 £17,589 13.7 yrs £8,062
6 kW 6740 kWh 5190 kWh 1550 kWh £1,384 £155 £1,539 £19,217 12.5 yrs £11,564
7 kW 7863 kWh 6054 kWh 1808 kWh £1,615 £181 £1,796 £20,844 11.6 yrs £15,067
8 kW 8986 kWh 6919 kWh 2067 kWh £1,845 £207 £2,052 £22,472 11.0 yrs £18,569

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,628, 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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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 BN12

Figures below are tailored to BN12 — click through for full league tables.

Big-Roof Britain Rank #318 of 2182
5.9 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #15 of 2996
8.7 years (UK avg 10.8 years)
~£1,123 /yr • £9,767 upfront
Standing-Charge Drag Rank #185 of 2996
17.7% (UK avg 26.6%) drag on savings
£199 fixed • ~£1,123 /yr value
Aspect Penalty View ranking →
East −21.1% West −22.6%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BN12

Monthly generation per kilowatt of solar panels

kWh 42 Jan 58 Feb 96 Mar 127 Apr 135 May 139 Jun 140 Jul 122 Aug 104 Sep 72 Oct 48 Nov 38 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.5% 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 94 kWh. So a typical 4 kW home system would generate roughly 185 kWh in winter, or 374 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.67p/kWh
Daily Fixed Charge
54.45p/day
Local Sunshine
1123kWh/kW
A 1 kW system generates ~1123 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: 44% • Flats: 26% • Bungalows: 28% Based on 6,127 properties

Coverage

Worthing (74%)|Arun (26%)

Areas Covered

Goring, Ferring, Castle, Marine, Central, Northbrook, Angmering & Findon

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

BN13 (Worthing)
≈2.1 km away
Local sunshine: ~1,119 kWh/kWp · -0% vs BN12
BN14 (Worthing)
≈3.6 km away
Local sunshine: ~1,119 kWh/kWp · -0% vs BN12
BN11 (Worthing)
≈3.7 km away
Local sunshine: ~1,119 kWh/kWp · -0% vs BN12
BN16 (Arun)
≈5.6 km away
Local sunshine: ~1,128 kWh/kWp · +0% vs BN12
BN99 (Adur)
≈6.6 km away
Local sunshine: ~1,119 kWh/kWp · -0% vs BN12
BN95 (Adur)
≈6.6 km away
Local sunshine: ~1,112 kWh/kWp · -1% vs BN12

Similar sunshine across the UK

TQ7 (South Hams)
~1,123 kWh/kWp · +0% vs BN12
PO20 (Chichester)
~1,122 kWh/kWp · -0% vs BN12
PO38 (Isle of Wight)
~1,125 kWh/kWp · +0% vs BN12