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Solar panel cost in Bromley (BR6)

See realistic solar installation costs, savings and payback for BR6 (Bromley) 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
9.7 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£1,010
What you save every year
Profit Over 25 Years
£15,496
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 1010 kWh/kW — 19 below 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 1010 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)
1010 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: £842, Upfront: £8,139, Break-even: 9.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2021 kWh 808 kWh 1212 kWh £216 £121 £337 £3,256 9.7 yrs £3,481
3 kW 3031 kWh 1212 kWh 1819 kWh £323 £182 £505 £4,883 9.7 yrs £5,222
4 kW 4042 kWh 1617 kWh 2425 kWh £431 £242 £674 £6,511 9.7 yrs £6,962
5 kW 5052 kWh 2021 kWh 3031 kWh £539 £303 £842 £8,139 9.7 yrs £8,703
6 kW 6062 kWh 2425 kWh 3637 kWh £647 £364 £1,010 £9,767 9.7 yrs £10,443
7 kW 7073 kWh 2829 kWh 4244 kWh £755 £424 £1,179 £11,394 9.7 yrs £12,184
8 kW 8083 kWh 3233 kWh 4850 kWh £862 £485 £1,347 £13,022 9.7 yrs £13,924

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: £1,011, Upfront: £10,239, Break-even: 10.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2021 kWh 1212 kWh 808 kWh £323 £81 £404 £5,356 13.2 yrs £2,729
3 kW 3031 kWh 1819 kWh 1212 kWh £485 £121 £606 £6,983 11.5 yrs £5,143
4 kW 4042 kWh 2425 kWh 1617 kWh £647 £162 £808 £8,611 10.7 yrs £7,557
5 kW 5052 kWh 3031 kWh 2021 kWh £808 £202 £1,011 £10,239 10.1 yrs £9,971
6 kW 6062 kWh 3637 kWh 2425 kWh £970 £242 £1,213 £11,867 9.8 yrs £12,386
7 kW 7073 kWh 4244 kWh 2829 kWh £1,132 £283 £1,415 £13,494 9.5 yrs £14,800
8 kW 8083 kWh 4850 kWh 3233 kWh £1,293 £323 £1,617 £15,122 9.4 yrs £17,214

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: £1,095, Upfront: £11,639, Break-even: 10.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2021 kWh 1415 kWh 606 kWh £377 £61 £438 £6,756 15.4 yrs £2,002
3 kW 3031 kWh 2122 kWh 909 kWh £566 £91 £657 £8,383 12.8 yrs £4,753
4 kW 4042 kWh 2829 kWh 1212 kWh £755 £121 £876 £10,011 11.4 yrs £7,505
5 kW 5052 kWh 3536 kWh 1516 kWh £943 £152 £1,095 £11,639 10.6 yrs £10,256
6 kW 6062 kWh 4244 kWh 1819 kWh £1,132 £182 £1,314 £13,267 10.1 yrs £13,007
7 kW 7073 kWh 4951 kWh 2122 kWh £1,320 £212 £1,533 £14,894 9.7 yrs £15,758
8 kW 8083 kWh 5658 kWh 2425 kWh £1,509 £242 £1,752 £16,522 9.4 yrs £18,509

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: £1,120, Upfront: £13,389, 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 2021 kWh 1475 kWh 546 kWh £393 £55 £448 £8,506 19.0 yrs £454
3 kW 3031 kWh 2213 kWh 818 kWh £590 £82 £672 £10,133 15.1 yrs £3,307
4 kW 4042 kWh 2950 kWh 1091 kWh £787 £109 £896 £11,761 13.1 yrs £6,159
5 kW 5052 kWh 3688 kWh 1364 kWh £984 £136 £1,120 £13,389 12.0 yrs £9,011
6 kW 6062 kWh 4426 kWh 1637 kWh £1,180 £164 £1,344 £15,017 11.2 yrs £11,863
7 kW 7073 kWh 5163 kWh 1910 kWh £1,377 £191 £1,568 £16,644 10.6 yrs £14,716
8 kW 8083 kWh 5901 kWh 2182 kWh £1,574 £218 £1,792 £18,272 10.2 yrs £17,568

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: £1,137, Upfront: £15,139, Break-even: 13.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2021 kWh 1516 kWh 505 kWh £404 £51 £455 £10,256 22.6 yrs £-1,161
3 kW 3031 kWh 2273 kWh 758 kWh £606 £76 £682 £11,883 17.4 yrs £1,759
4 kW 4042 kWh 3031 kWh 1010 kWh £808 £101 £909 £13,511 14.9 yrs £4,678
5 kW 5052 kWh 3789 kWh 1263 kWh £1,011 £126 £1,137 £15,139 13.3 yrs £7,598
6 kW 6062 kWh 4547 kWh 1516 kWh £1,213 £152 £1,364 £16,767 12.3 yrs £10,518
7 kW 7073 kWh 5305 kWh 1768 kWh £1,415 £177 £1,592 £18,394 11.6 yrs £13,437
8 kW 8083 kWh 6062 kWh 2021 kWh £1,617 £202 £1,819 £20,022 11.0 yrs £16,357

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: £1,154, Upfront: £17,589, Break-even: 15.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2021 kWh 1556 kWh 465 kWh £415 £46 £461 £12,706 27.5 yrs £-3,476
3 kW 3031 kWh 2334 kWh 697 kWh £622 £70 £692 £14,333 20.7 yrs £-489
4 kW 4042 kWh 3112 kWh 930 kWh £830 £93 £923 £15,961 17.3 yrs £2,498
5 kW 5052 kWh 3890 kWh 1162 kWh £1,037 £116 £1,154 £17,589 15.2 yrs £5,485
6 kW 6062 kWh 4668 kWh 1394 kWh £1,245 £139 £1,384 £19,217 13.9 yrs £8,472
7 kW 7073 kWh 5446 kWh 1627 kWh £1,452 £163 £1,615 £20,844 12.9 yrs £11,459
8 kW 8083 kWh 6224 kWh 1859 kWh £1,660 £186 £1,846 £22,472 12.2 yrs £14,446

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 Bromley

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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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 BR6

Figures below are tailored to BR6 — click through for full league tables.

Big-Roof Britain Rank #503 of 2182
5.6 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #417 of 2996
9.7 years (UK avg 10.8 years)
~£1,010 /yr • £9,767 upfront
Standing-Charge Drag Rank #442 of 2996
19.7% (UK avg 26.6%) drag on savings
£199 fixed • ~£1,010 /yr value
Aspect Penalty View ranking →
East −20.9% West −20.0%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in BR6

Monthly generation per kilowatt of solar panels

kWh 38 Jan 51 Feb 85 Mar 112 Apr 120 May 122 Jun 125 Jul 113 Aug 95 Sep 68 Oct 46 Nov 35 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 49.0% 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 41 kWh per month; the average month produces around 84 kWh. So a typical 4 kW home system would generate roughly 165 kWh in winter, or 337 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.67p/kWh
Daily Fixed Charge
54.45p/day
Local Sunshine
1010kWh/kW
A 1 kW system generates ~1010 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: 64% • Flats: 20% • Bungalows: 12% Based on 10,953 properties

Coverage

Bromley (99%)|Sevenoaks (1%)

Areas Covered

Orpington, Farnborough & Crofton, Chelsfield, Petts Wood & Knoll, Darwin, St Mary Cray, Crockenhill and Well Hill, Bromley Common & Holwood + 2 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

BR5 (Bromley)
≈2.0 km away
Local sunshine: ~1,011 kWh/kWp · +0% vs BR6
BR8 (Sevenoaks)
≈6.0 km away
Local sunshine: ~1,010 kWh/kWp · -0% vs BR6
BR2 (Bromley)
≈6.1 km away
Local sunshine: ~999 kWh/kWp · -1% vs BR6
BR4 (Bromley)
≈7.7 km away
Local sunshine: ~1,000 kWh/kWp · -1% vs BR6
TN16 (Bromley)
≈8.4 km away
Local sunshine: ~1,009 kWh/kWp · -0% vs BR6
TN14 (Sevenoaks)
≈9.7 km away
Local sunshine: ~1,023 kWh/kWp · +1% vs BR6

Similar sunshine across the UK

CF6 (Vale of Glamorgan)
~1,010 kWh/kWp · -0% vs BR6
CF64 (Vale of Glamorgan)
~1,010 kWh/kWp · -0% vs BR6
IG6 (Redbridge)
~1,010 kWh/kWp · -0% vs BR6