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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in BN43 (Adur)

See if solar pays off for you in Adur — price, savings and payback in under a minute (official UK data).

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
10.9 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£930
What you save every year
Profit Over 25 Years
£13,072
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 South East, the current unit rate is 26.92p/kWh with a 47.60p/day standing charge. Your postcode’s south-facing sunshine yield is 1109 kWh/kW — 80 above the regional median (1029).

Read the full story

A typical roof here lands around 5.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 1109 kWh per year on a south-facing roof. We value self-used electricity at 26.9p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.9p/kWh
Standing charge
47.6p/day
Sunshine yield (south)
1109 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: £930, Upfront: £10,173, Break-even: 10.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2218 kWh 887 kWh 1331 kWh £239 £133 £372 £4,069 10.9 yrs £3,369
3 kW 3327 kWh 1331 kWh 1996 kWh £358 £200 £558 £6,104 10.9 yrs £5,054
4 kW 4436 kWh 1774 kWh 2662 kWh £478 £266 £744 £8,138 10.9 yrs £6,738
5 kW 5545 kWh 2218 kWh 3327 kWh £597 £333 £930 £10,173 10.9 yrs £8,423
6 kW 6654 kWh 2662 kWh 3992 kWh £716 £399 £1,116 £12,207 10.9 yrs £10,107
7 kW 7763 kWh 3105 kWh 4658 kWh £836 £466 £1,302 £14,242 10.9 yrs £11,792
8 kW 8872 kWh 3549 kWh 5323 kWh £955 £532 £1,488 £16,276 10.9 yrs £13,477

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: £1,117, Upfront: £12,273, Break-even: 11.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2218 kWh 1331 kWh 887 kWh £358 £89 £447 £6,169 13.8 yrs £2,770
3 kW 3327 kWh 1996 kWh 1331 kWh £537 £133 £670 £8,204 12.2 yrs £5,205
4 kW 4436 kWh 2662 kWh 1774 kWh £716 £177 £894 £10,238 11.5 yrs £7,640
5 kW 5545 kWh 3327 kWh 2218 kWh £896 £222 £1,117 £12,273 11.0 yrs £10,076
6 kW 6654 kWh 3992 kWh 2662 kWh £1,075 £266 £1,341 £14,307 10.7 yrs £12,511
7 kW 7763 kWh 4658 kWh 3105 kWh £1,254 £311 £1,564 £16,342 10.4 yrs £14,946
8 kW 8872 kWh 5323 kWh 3549 kWh £1,433 £355 £1,788 £18,376 10.3 yrs £17,381

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: £1,211, Upfront: £13,673, Break-even: 11.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2218 kWh 1553 kWh 665 kWh £418 £67 £484 £7,569 15.6 yrs £2,121
3 kW 3327 kWh 2329 kWh 998 kWh £627 £100 £727 £9,604 13.2 yrs £4,931
4 kW 4436 kWh 3105 kWh 1331 kWh £836 £133 £969 £11,638 12.0 yrs £7,742
5 kW 5545 kWh 3881 kWh 1663 kWh £1,045 £166 £1,211 £13,673 11.3 yrs £10,552
6 kW 6654 kWh 4658 kWh 1996 kWh £1,254 £200 £1,453 £15,707 10.8 yrs £13,362
7 kW 7763 kWh 5434 kWh 2329 kWh £1,463 £233 £1,696 £17,742 10.5 yrs £16,173
8 kW 8872 kWh 6210 kWh 2662 kWh £1,672 £266 £1,938 £19,776 10.2 yrs £18,983

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: £1,239, Upfront: £15,423, Break-even: 12.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2218 kWh 1619 kWh 599 kWh £436 £60 £496 £9,319 18.8 yrs £596
3 kW 3327 kWh 2429 kWh 898 kWh £654 £90 £744 £11,354 15.3 yrs £3,519
4 kW 4436 kWh 3238 kWh 1198 kWh £872 £120 £991 £13,388 13.5 yrs £6,442
5 kW 5545 kWh 4048 kWh 1497 kWh £1,090 £150 £1,239 £15,423 12.4 yrs £9,365
6 kW 6654 kWh 4857 kWh 1797 kWh £1,308 £180 £1,487 £17,457 11.7 yrs £12,288
7 kW 7763 kWh 5667 kWh 2096 kWh £1,526 £210 £1,735 £19,492 11.2 yrs £15,211
8 kW 8872 kWh 6476 kWh 2395 kWh £1,743 £240 £1,983 £21,526 10.9 yrs £18,134

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: £1,258, Upfront: £17,173, 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 2218 kWh 1663 kWh 554 kWh £448 £55 £503 £11,069 22.0 yrs £-1,004
3 kW 3327 kWh 2495 kWh 832 kWh £672 £83 £755 £13,104 17.4 yrs £1,994
4 kW 4436 kWh 3327 kWh 1109 kWh £896 £111 £1,007 £15,138 15.0 yrs £4,992
5 kW 5545 kWh 4159 kWh 1386 kWh £1,120 £139 £1,258 £17,173 13.6 yrs £7,990
6 kW 6654 kWh 4990 kWh 1663 kWh £1,343 £166 £1,510 £19,207 12.7 yrs £10,988
7 kW 7763 kWh 5822 kWh 1941 kWh £1,567 £194 £1,761 £21,242 12.1 yrs £13,986
8 kW 8872 kWh 6654 kWh 2218 kWh £1,791 £222 £2,013 £23,276 11.6 yrs £16,984

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: £1,277, Upfront: £19,623, Break-even: 15.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2218 kWh 1708 kWh 510 kWh £460 £51 £511 £13,519 26.5 yrs £-3,304
3 kW 3327 kWh 2562 kWh 765 kWh £690 £77 £766 £15,554 20.3 yrs £-231
4 kW 4436 kWh 3416 kWh 1020 kWh £919 £102 £1,022 £17,588 17.2 yrs £2,842
5 kW 5545 kWh 4270 kWh 1275 kWh £1,149 £128 £1,277 £19,623 15.4 yrs £5,915
6 kW 6654 kWh 5123 kWh 1530 kWh £1,379 £153 £1,532 £21,657 14.1 yrs £8,989
7 kW 7763 kWh 5977 kWh 1785 kWh £1,609 £179 £1,788 £23,692 13.3 yrs £12,062
8 kW 8872 kWh 6831 kWh 2041 kWh £1,839 £204 £2,043 £25,726 12.6 yrs £15,135

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 BN43

Figures below are tailored to BN43 — click through for full league tables.

Big-Roof Britain Rank #1389 of 2182
4.8 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #41 of 2997
9.5 years (UK avg 11.3 years)
~£1,070 /yr • £10,173 upfront
Standing-Charge Drag Rank #589 of 2997
16.2% (UK avg 21.7%) drag on savings
£174 fixed • ~£1,070 /yr value

Your Area at a Glance

Your Electricity Rate
26.92p/kWh
Daily Fixed Charge
47.60p/day
Local Sunshine
1109kWh/kW
A 1 kW system generates ~1109 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
5.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 52% • Flats: 34% • Bungalows: 11% Based on 6,433 properties

Coverage

Adur (100%)

Areas Covered

St Mary's, St Nicolas, Marine, Buckingham, Southlands, Southwick Green, Hillside, Mash Barn + 3 more

Data Sources & Assumptions

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

Electricity rates: Ofgem price cap, Q4 2025

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 South East

BN4 (Adur)
≈1.8 km away
Local sunshine: ~1,110 kWh/kWp · +0% vs BN43
BN42 (Adur)
≈2.7 km away
Local sunshine: ~1,110 kWh/kWp · +0% vs BN43
BN15 (Adur)
≈3.6 km away
Local sunshine: ~1,112 kWh/kWp · +0% vs BN43
BN99 (Adur)
≈4.2 km away
Local sunshine: ~1,119 kWh/kWp · +1% vs BN43
BN95 (Adur)
≈4.2 km away
Local sunshine: ~1,112 kWh/kWp · +0% vs BN43
BN41 (Brighton and Hove)
≈4.2 km away
Local sunshine: ~1,110 kWh/kWp · +0% vs BN43

Similar sunshine across the UK

DT5 (Dorset)
~1,109 kWh/kWp · +0% vs BN43
DT4 (Dorset)
~1,110 kWh/kWp · +0% vs BN43
PO37 (Isle of Wight)
~1,108 kWh/kWp · -0% vs BN43