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Solar panel cost in Bexley (DA6)

See realistic solar installation costs, savings and payback for DA6 (Bexley) 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
£1,008
What you save every year
Profit Over 25 Years
£15,440
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 London, the current unit rate is 26.35p/kWh with a 44.78p/day standing charge. Your postcode’s south-facing sunshine yield is 1016 kWh/kW — 25 above the regional median (991).

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 1016 kWh per year on a south-facing roof. We value self-used electricity at 26.4p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.4p/kWh
Standing charge
44.8p/day
Sunshine yield (south)
1016 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: £840, 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 2032 kWh 813 kWh 1219 kWh £214 £122 £336 £3,256 9.7 yrs £3,466
3 kW 3048 kWh 1219 kWh 1829 kWh £321 £183 £504 £4,883 9.7 yrs £5,199
4 kW 4064 kWh 1626 kWh 2438 kWh £428 £244 £672 £6,511 9.7 yrs £6,932
5 kW 5080 kWh 2032 kWh 3048 kWh £535 £305 £840 £8,139 9.7 yrs £8,665
6 kW 6096 kWh 2438 kWh 3657 kWh £642 £366 £1,008 £9,767 9.7 yrs £10,398
7 kW 7112 kWh 2845 kWh 4267 kWh £750 £427 £1,176 £11,394 9.7 yrs £12,131
8 kW 8128 kWh 3251 kWh 4877 kWh £857 £488 £1,344 £13,022 9.7 yrs £13,865

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: £1,006, Upfront: £10,239, Break-even: 10.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2032 kWh 1219 kWh 813 kWh £321 £81 £403 £5,356 13.3 yrs £2,695
3 kW 3048 kWh 1829 kWh 1219 kWh £482 £122 £604 £6,983 11.6 yrs £5,093
4 kW 4064 kWh 2438 kWh 1626 kWh £642 £163 £805 £8,611 10.7 yrs £7,490
5 kW 5080 kWh 3048 kWh 2032 kWh £803 £203 £1,006 £10,239 10.2 yrs £9,888
6 kW 6096 kWh 3657 kWh 2438 kWh £964 £244 £1,208 £11,867 9.8 yrs £12,285
7 kW 7112 kWh 4267 kWh 2845 kWh £1,124 £284 £1,409 £13,494 9.6 yrs £14,683
8 kW 8128 kWh 4877 kWh 3251 kWh £1,285 £325 £1,610 £15,122 9.4 yrs £17,080

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: £1,089, Upfront: £11,639, Break-even: 10.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2032 kWh 1422 kWh 610 kWh £375 £61 £436 £6,756 15.5 yrs £1,959
3 kW 3048 kWh 2134 kWh 914 kWh £562 £91 £654 £8,383 12.8 yrs £4,689
4 kW 4064 kWh 2845 kWh 1219 kWh £750 £122 £871 £10,011 11.5 yrs £7,419
5 kW 5080 kWh 3556 kWh 1524 kWh £937 £152 £1,089 £11,639 10.7 yrs £10,149
6 kW 6096 kWh 4267 kWh 1829 kWh £1,124 £183 £1,307 £13,267 10.1 yrs £12,878
7 kW 7112 kWh 4978 kWh 2134 kWh £1,312 £213 £1,525 £14,894 9.8 yrs £15,608
8 kW 8128 kWh 5689 kWh 2438 kWh £1,499 £244 £1,743 £16,522 9.5 yrs £18,338

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: £1,114, 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 2032 kWh 1483 kWh 549 kWh £391 £55 £446 £8,506 19.1 yrs £409
3 kW 3048 kWh 2225 kWh 823 kWh £586 £82 £669 £10,133 15.2 yrs £3,238
4 kW 4064 kWh 2967 kWh 1097 kWh £782 £110 £891 £11,761 13.2 yrs £6,068
5 kW 5080 kWh 3708 kWh 1372 kWh £977 £137 £1,114 £13,389 12.0 yrs £8,897
6 kW 6096 kWh 4450 kWh 1646 kWh £1,173 £165 £1,337 £15,017 11.2 yrs £11,726
7 kW 7112 kWh 5192 kWh 1920 kWh £1,368 £192 £1,560 £16,644 10.7 yrs £14,556
8 kW 8128 kWh 5933 kWh 2194 kWh £1,563 £219 £1,783 £18,272 10.2 yrs £17,385

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: £1,131, Upfront: £15,139, Break-even: 13.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2032 kWh 1524 kWh 508 kWh £402 £51 £452 £10,256 22.7 yrs £-1,208
3 kW 3048 kWh 2286 kWh 762 kWh £602 £76 £679 £11,883 17.5 yrs £1,688
4 kW 4064 kWh 3048 kWh 1016 kWh £803 £102 £905 £13,511 14.9 yrs £4,583
5 kW 5080 kWh 3810 kWh 1270 kWh £1,004 £127 £1,131 £15,139 13.4 yrs £7,479
6 kW 6096 kWh 4572 kWh 1524 kWh £1,205 £152 £1,357 £16,767 12.4 yrs £10,375
7 kW 7112 kWh 5334 kWh 1778 kWh £1,405 £178 £1,583 £18,394 11.6 yrs £13,271
8 kW 8128 kWh 6096 kWh 2032 kWh £1,606 £203 £1,809 £20,022 11.1 yrs £16,167

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: £1,148, Upfront: £17,589, Break-even: 15.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2032 kWh 1565 kWh 467 kWh £412 £47 £459 £12,706 27.7 yrs £-3,525
3 kW 3048 kWh 2347 kWh 701 kWh £618 £70 £689 £14,333 20.8 yrs £-563
4 kW 4064 kWh 3129 kWh 935 kWh £825 £93 £918 £15,961 17.4 yrs £2,399
5 kW 5080 kWh 3911 kWh 1168 kWh £1,031 £117 £1,148 £17,589 15.3 yrs £5,361
6 kW 6096 kWh 4694 kWh 1402 kWh £1,237 £140 £1,377 £19,217 14.0 yrs £8,324
7 kW 7112 kWh 5476 kWh 1636 kWh £1,443 £164 £1,607 £20,844 13.0 yrs £11,286
8 kW 8128 kWh 6258 kWh 1869 kWh £1,649 £187 £1,836 £22,472 12.2 yrs £14,248

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 Bexley

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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Insights for DA6

Figures below are tailored to DA6 — click through for full league tables.

Big-Roof Britain Rank #1818 of 2182
4.4 kWp (UK avg 5.1 kWp)
~9 panels (≈430 W)
Solar Payback Index Rank #455 of 2996
9.7 years (UK avg 10.8 years)
~£1,008 /yr • £9,767 upfront
Standing-Charge Drag Rank #4 of 2996
16.2% (UK avg 26.6%) drag on savings
£163 fixed • ~£1,008 /yr value
Aspect Penalty View ranking →
East −21.6% West −20.2%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in DA6

Monthly generation per kilowatt of solar panels

kWh 40 Jan 52 Feb 85 Mar 113 Apr 120 May 122 Jun 125 Jul 112 Aug 95 Sep 69 Oct 48 Nov 36 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.5% 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 43 kWh per month; the average month produces around 85 kWh. So a typical 4 kW home system would generate roughly 171 kWh in winter, or 339 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.35p/kWh
Daily Fixed Charge
44.78p/day
Local Sunshine
1016kWh/kW
A 1 kW system generates ~1016 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: 48% • Bungalows: 3% Based on 3,024 properties

Coverage

Bexley (100%)

Areas Covered

Bexleyheath, Crook Log, Crayford

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 London

DA7 (Bexley)
≈0.8 km away
Local sunshine: ~1,016 kWh/kWp · +0% vs DA6
DA5 (Bexley)
≈1.8 km away
Local sunshine: ~1,020 kWh/kWp · +0% vs DA6
DA16 (Bexley)
≈2.2 km away
Local sunshine: ~1,016 kWh/kWp · +0% vs DA6
DA15 (Bexley)
≈3.3 km away
Local sunshine: ~1,018 kWh/kWp · +0% vs DA6
DA17 (Bexley)
≈3.7 km away
Local sunshine: ~1,014 kWh/kWp · -0% vs DA6
DA8 (Bexley)
≈3.8 km away
Local sunshine: ~1,019 kWh/kWp · +0% vs DA6

Similar sunshine across the UK

IP31 (West Suffolk)
~1,016 kWh/kWp · +0% vs DA6
TQ1 (Torbay)
~1,016 kWh/kWp · -0% vs DA6
SG8 (North Hertfordshire)
~1,016 kWh/kWp · +0% vs DA6