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Solar panel cost in Mid Sussex (BN6)

See realistic solar installation costs, savings and payback for BN6 (Mid Sussex) 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
9.0 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£1,085
What you save every year
Profit Over 25 Years
£17,346
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 1084 kWh/kW — 55 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 1084 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)
1084 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: £904, Upfront: £8,139, Break-even: 9.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2169 kWh 868 kWh 1301 kWh £231 £130 £362 £3,256 9.0 yrs £3,975
3 kW 3253 kWh 1301 kWh 1952 kWh £347 £195 £542 £4,883 9.0 yrs £5,962
4 kW 4338 kWh 1735 kWh 2603 kWh £463 £260 £723 £6,511 9.0 yrs £7,949
5 kW 5422 kWh 2169 kWh 3253 kWh £578 £325 £904 £8,139 9.0 yrs £9,936
6 kW 6507 kWh 2603 kWh 3904 kWh £694 £390 £1,085 £9,767 9.0 yrs £11,924
7 kW 7591 kWh 3036 kWh 4555 kWh £810 £455 £1,265 £11,394 9.0 yrs £13,911
8 kW 8675 kWh 3470 kWh 5205 kWh £925 £521 £1,446 £13,022 9.0 yrs £15,898

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: £1,085, Upfront: £10,239, Break-even: 9.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2169 kWh 1301 kWh 868 kWh £347 £87 £434 £5,356 12.3 yrs £3,321
3 kW 3253 kWh 1952 kWh 1301 kWh £521 £130 £651 £6,983 10.7 yrs £6,031
4 kW 4338 kWh 2603 kWh 1735 kWh £694 £174 £868 £8,611 9.9 yrs £8,741
5 kW 5422 kWh 3253 kWh 2169 kWh £868 £217 £1,085 £10,239 9.4 yrs £11,452
6 kW 6507 kWh 3904 kWh 2603 kWh £1,041 £260 £1,301 £11,867 9.1 yrs £14,162
7 kW 7591 kWh 4555 kWh 3036 kWh £1,215 £304 £1,518 £13,494 8.9 yrs £16,872
8 kW 8675 kWh 5205 kWh 3470 kWh £1,388 £347 £1,735 £15,122 8.7 yrs £19,583

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: £1,175, Upfront: £11,639, Break-even: 9.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2169 kWh 1518 kWh 651 kWh £405 £65 £470 £6,756 14.4 yrs £2,644
3 kW 3253 kWh 2277 kWh 976 kWh £607 £98 £705 £8,383 11.9 yrs £5,716
4 kW 4338 kWh 3036 kWh 1301 kWh £810 £130 £940 £10,011 10.7 yrs £8,788
5 kW 5422 kWh 3795 kWh 1627 kWh £1,012 £163 £1,175 £11,639 9.9 yrs £11,859
6 kW 6507 kWh 4555 kWh 1952 kWh £1,215 £195 £1,410 £13,267 9.4 yrs £14,931
7 kW 7591 kWh 5314 kWh 2277 kWh £1,417 £228 £1,645 £14,894 9.1 yrs £18,003
8 kW 8675 kWh 6073 kWh 2603 kWh £1,620 £260 £1,880 £16,522 8.8 yrs £21,075

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: £1,202, Upfront: £13,389, Break-even: 11.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2169 kWh 1583 kWh 586 kWh £422 £59 £481 £8,506 17.7 yrs £1,111
3 kW 3253 kWh 2375 kWh 878 kWh £633 £88 £721 £10,133 14.1 yrs £4,291
4 kW 4338 kWh 3167 kWh 1171 kWh £845 £117 £962 £11,761 12.2 yrs £7,471
5 kW 5422 kWh 3958 kWh 1464 kWh £1,056 £146 £1,202 £13,389 11.1 yrs £10,652
6 kW 6507 kWh 4750 kWh 1757 kWh £1,267 £176 £1,442 £15,017 10.4 yrs £13,832
7 kW 7591 kWh 5541 kWh 2050 kWh £1,478 £205 £1,683 £16,644 9.9 yrs £17,013
8 kW 8675 kWh 6333 kWh 2342 kWh £1,689 £234 £1,923 £18,272 9.5 yrs £20,193

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: £1,220, Upfront: £15,139, 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 2169 kWh 1627 kWh 542 kWh £434 £54 £488 £10,256 21.0 yrs £-495
3 kW 3253 kWh 2440 kWh 813 kWh £651 £81 £732 £11,883 16.2 yrs £2,758
4 kW 4338 kWh 3253 kWh 1084 kWh £868 £108 £976 £13,511 13.8 yrs £6,011
5 kW 5422 kWh 4067 kWh 1356 kWh £1,085 £136 £1,220 £15,139 12.4 yrs £9,263
6 kW 6507 kWh 4880 kWh 1627 kWh £1,301 £163 £1,464 £16,767 11.5 yrs £12,516
7 kW 7591 kWh 5693 kWh 1898 kWh £1,518 £190 £1,708 £18,394 10.8 yrs £15,769
8 kW 8675 kWh 6507 kWh 2169 kWh £1,735 £217 £1,952 £20,022 10.3 yrs £19,021

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: £1,238, Upfront: £17,589, Break-even: 14.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2169 kWh 1670 kWh 499 kWh £445 £50 £495 £12,706 25.7 yrs £-2,800
3 kW 3253 kWh 2505 kWh 748 kWh £668 £75 £743 £14,333 19.3 yrs £525
4 kW 4338 kWh 3340 kWh 998 kWh £891 £100 £991 £15,961 16.1 yrs £3,850
5 kW 5422 kWh 4175 kWh 1247 kWh £1,113 £125 £1,238 £17,589 14.2 yrs £7,175
6 kW 6507 kWh 5010 kWh 1496 kWh £1,336 £150 £1,486 £19,217 12.9 yrs £10,500
7 kW 7591 kWh 5845 kWh 1746 kWh £1,559 £175 £1,733 £20,844 12.0 yrs £13,825
8 kW 8675 kWh 6680 kWh 1995 kWh £1,782 £200 £1,981 £22,472 11.3 yrs £17,150

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 Mid Sussex

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 BN6

Figures below are tailored to BN6 — click through for full league tables.

Big-Roof Britain Rank #295 of 2182
5.9 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #93 of 2996
9.0 years (UK avg 10.8 years)
~£1,084 /yr • £9,767 upfront
Standing-Charge Drag Rank #268 of 2996
18.4% (UK avg 26.6%) drag on savings
£199 fixed • ~£1,084 /yr value
Aspect Penalty View ranking →
East −20.3% West −21.7%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BN6

Monthly generation per kilowatt of solar panels

kWh 41 Jan 56 Feb 93 Mar 124 Apr 130 May 134 Jun 134 Jul 118 Aug 101 Sep 70 Oct 48 Nov 36 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.1% of an average month (Dec–Feb)

Best / worst month: Jun / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 44 kWh per month; the average month produces around 90 kWh. So a typical 4 kW home system would generate roughly 177 kWh in winter, or 361 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.67p/kWh
Daily Fixed Charge
54.45p/day
Local Sunshine
1084kWh/kW
A 1 kW system generates ~1084 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: 70% • Flats: 14% • Bungalows: 13% Based on 5,389 properties

Coverage

Mid Sussex (90%)|Lewes (10%)

Areas Covered

Hassocks, Hurstpierpoint, Downland Villages, Ditchling & Westmeston, Plumpton, Streat, East Chiltington & St John, Stone Cross + 3 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

RH15 (Mid Sussex)
≈3.2 km away
Local sunshine: ~1,060 kWh/kWp · -2% vs BN6
BN45 (Mid Sussex)
≈4.8 km away
Local sunshine: ~1,068 kWh/kWp · -2% vs BN6
BN5 (Horsham)
≈8.9 km away
Local sunshine: ~1,083 kWh/kWp · -0% vs BN6
RH16 (Mid Sussex)
≈9.2 km away
Local sunshine: ~1,029 kWh/kWp · -5% vs BN6
RH17 (Mid Sussex)
≈9.7 km away
Local sunshine: ~1,033 kWh/kWp · -5% vs BN6
BN52 (Brighton and Hove)
≈10.4 km away
Local sunshine: ~1,113 kWh/kWp · +3% vs BN6

Similar sunshine across the UK

PO1 (Portsmouth)
~1,084 kWh/kWp · -0% vs BN6
PO5 (Portsmouth)
~1,084 kWh/kWp · -0% vs BN6
PO4 (Portsmouth)
~1,084 kWh/kWp · -0% vs BN6