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Solar panel cost in Horsham (BN44)

See realistic solar installation costs, savings and payback for BN44 (Horsham) 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
£1,086
What you save every year
Profit Over 25 Years
£17,385
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 1086 kWh/kW — 57 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 1086 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)
1086 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: £905, 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 2172 kWh 869 kWh 1303 kWh £232 £130 £362 £3,256 9.0 yrs £3,985
3 kW 3258 kWh 1303 kWh 1955 kWh £348 £195 £543 £4,883 9.0 yrs £5,977
4 kW 4344 kWh 1738 kWh 2606 kWh £463 £261 £724 £6,511 9.0 yrs £7,970
5 kW 5430 kWh 2172 kWh 3258 kWh £579 £326 £905 £8,139 9.0 yrs £9,962
6 kW 6516 kWh 2606 kWh 3909 kWh £695 £391 £1,086 £9,767 9.0 yrs £11,954
7 kW 7602 kWh 3041 kWh 4561 kWh £811 £456 £1,267 £11,394 9.0 yrs £13,947
8 kW 8688 kWh 3475 kWh 5213 kWh £927 £521 £1,448 £13,022 9.0 yrs £15,939

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: £1,086, 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 2172 kWh 1303 kWh 869 kWh £348 £87 £434 £5,356 12.3 yrs £3,333
3 kW 3258 kWh 1955 kWh 1303 kWh £521 £130 £652 £6,983 10.7 yrs £6,050
4 kW 4344 kWh 2606 kWh 1738 kWh £695 £174 £869 £8,611 9.9 yrs £8,766
5 kW 5430 kWh 3258 kWh 2172 kWh £869 £217 £1,086 £10,239 9.4 yrs £11,483
6 kW 6516 kWh 3909 kWh 2606 kWh £1,043 £261 £1,303 £11,867 9.1 yrs £14,199
7 kW 7602 kWh 4561 kWh 3041 kWh £1,216 £304 £1,520 £13,494 8.9 yrs £16,916
8 kW 8688 kWh 5213 kWh 3475 kWh £1,390 £348 £1,738 £15,122 8.7 yrs £19,632

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: £1,177, 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 2172 kWh 1520 kWh 652 kWh £405 £65 £471 £6,756 14.4 yrs £2,657
3 kW 3258 kWh 2281 kWh 977 kWh £608 £98 £706 £8,383 11.9 yrs £5,736
4 kW 4344 kWh 3041 kWh 1303 kWh £811 £130 £941 £10,011 10.6 yrs £8,814
5 kW 5430 kWh 3801 kWh 1629 kWh £1,014 £163 £1,177 £11,639 9.9 yrs £11,893
6 kW 6516 kWh 4561 kWh 1955 kWh £1,216 £195 £1,412 £13,267 9.4 yrs £14,971
7 kW 7602 kWh 5321 kWh 2281 kWh £1,419 £228 £1,647 £14,894 9.0 yrs £18,050
8 kW 8688 kWh 6081 kWh 2606 kWh £1,622 £261 £1,883 £16,522 8.8 yrs £21,129

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: £1,204, 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 2172 kWh 1586 kWh 586 kWh £423 £59 £481 £8,506 17.7 yrs £1,124
3 kW 3258 kWh 2378 kWh 880 kWh £634 £88 £722 £10,133 14.0 yrs £4,312
4 kW 4344 kWh 3171 kWh 1173 kWh £846 £117 £963 £11,761 12.2 yrs £7,499
5 kW 5430 kWh 3964 kWh 1466 kWh £1,057 £147 £1,204 £13,389 11.1 yrs £10,686
6 kW 6516 kWh 4757 kWh 1759 kWh £1,269 £176 £1,444 £15,017 10.4 yrs £13,873
7 kW 7602 kWh 5549 kWh 2052 kWh £1,480 £205 £1,685 £16,644 9.9 yrs £17,060
8 kW 8688 kWh 6342 kWh 2346 kWh £1,691 £235 £1,926 £18,272 9.5 yrs £20,248

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: £1,222, 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 2172 kWh 1629 kWh 543 kWh £434 £54 £489 £10,256 21.0 yrs £-481
3 kW 3258 kWh 2443 kWh 814 kWh £652 £81 £733 £11,883 16.2 yrs £2,779
4 kW 4344 kWh 3258 kWh 1086 kWh £869 £109 £977 £13,511 13.8 yrs £6,038
5 kW 5430 kWh 4072 kWh 1357 kWh £1,086 £136 £1,222 £15,139 12.4 yrs £9,298
6 kW 6516 kWh 4887 kWh 1629 kWh £1,303 £163 £1,466 £16,767 11.4 yrs £12,558
7 kW 7602 kWh 5701 kWh 1900 kWh £1,521 £190 £1,711 £18,394 10.8 yrs £15,817
8 kW 8688 kWh 6516 kWh 2172 kWh £1,738 £217 £1,955 £20,022 10.2 yrs £19,077

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: £1,240, 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 2172 kWh 1672 kWh 500 kWh £446 £50 £496 £12,706 25.6 yrs £-2,786
3 kW 3258 kWh 2509 kWh 749 kWh £669 £75 £744 £14,333 19.3 yrs £546
4 kW 4344 kWh 3345 kWh 999 kWh £892 £100 £992 £15,961 16.1 yrs £3,878
5 kW 5430 kWh 4181 kWh 1249 kWh £1,115 £125 £1,240 £17,589 14.2 yrs £7,210
6 kW 6516 kWh 5017 kWh 1499 kWh £1,338 £150 £1,488 £19,217 12.9 yrs £10,542
7 kW 7602 kWh 5853 kWh 1748 kWh £1,561 £175 £1,736 £20,844 12.0 yrs £13,874
8 kW 8688 kWh 6690 kWh 1998 kWh £1,784 £200 £1,984 £22,472 11.3 yrs £17,206

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 Horsham

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 BN44

Figures below are tailored to BN44 — click through for full league tables.

Big-Roof Britain Rank #399 of 2182
5.7 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #91 of 2996
9.0 years (UK avg 10.8 years)
~£1,086 /yr • £9,767 upfront
Standing-Charge Drag Rank #246 of 2996
18.3% (UK avg 26.6%) drag on savings
£199 fixed • ~£1,086 /yr value
Aspect Penalty View ranking →
East −20.5% West −21.7%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BN44

Monthly generation per kilowatt of solar panels

kWh 41 Jan 57 Feb 93 Mar 124 Apr 129 May 134 Jun 133 Jul 118 Aug 101 Sep 71 Oct 49 Nov 37 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.5% 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 45 kWh per month; the average month produces around 90 kWh. So a typical 4 kW home system would generate roughly 179 kWh in winter, or 362 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.67p/kWh
Daily Fixed Charge
54.45p/day
Local Sunshine
1086kWh/kW
A 1 kW system generates ~1086 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: 63% • Flats: 17% • Bungalows: 18% Based on 2,272 properties

Coverage

Horsham (100%)

Areas Covered

Steyning & Ashurst, Bramber, Upper Beeding & Woodmancote, Henfield, West Chiltington, Thakeham & Ashington, Southwick Green

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

BN5 (Horsham)
≈5.8 km away
Local sunshine: ~1,083 kWh/kWp · -0% vs BN44
BN15 (Adur)
≈6.6 km away
Local sunshine: ~1,112 kWh/kWp · +2% vs BN44
BN99 (Adur)
≈7.0 km away
Local sunshine: ~1,119 kWh/kWp · +3% vs BN44
BN43 (Adur)
≈7.0 km away
Local sunshine: ~1,109 kWh/kWp · +2% vs BN44
BN95 (Adur)
≈7.2 km away
Local sunshine: ~1,112 kWh/kWp · +2% vs BN44
BN4 (Adur)
≈7.6 km away
Local sunshine: ~1,110 kWh/kWp · +2% vs BN44

Similar sunshine across the UK

PL21 (South Hams)
~1,086 kWh/kWp · -0% vs BN44
CO15 (Tendring)
~1,086 kWh/kWp · +0% vs BN44
PO7 (Havant)
~1,086 kWh/kWp · +0% vs BN44