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Solar panel cost in Croydon (SE25)

See realistic solar installation costs, savings and payback for SE25 (Croydon) 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
11.0 years
After this, it's pure profit
Upfront Cost
£5,481
What you pay to get started
Annual Benefit
£498
What you save every year
Profit Over 25 Years
£6,975
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 996 kWh/kW — 33 below the regional median (1029).

Read the full story

A typical roof here lands around 3.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 996 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)
996 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: £830, Upfront: £9,134, 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 1993 kWh 797 kWh 1196 kWh £213 £120 £332 £3,654 11.0 yrs £2,990
3 kW 2989 kWh 1196 kWh 1794 kWh £319 £179 £498 £5,481 11.0 yrs £4,484
4 kW 3986 kWh 1594 kWh 2391 kWh £425 £239 £664 £7,307 11.0 yrs £5,979
5 kW 4982 kWh 1993 kWh 2989 kWh £531 £299 £830 £9,134 11.0 yrs £7,474
6 kW 5978 kWh 2391 kWh 3587 kWh £638 £359 £996 £10,961 11.0 yrs £8,969
7 kW 6975 kWh 2790 kWh 4185 kWh £744 £418 £1,163 £12,788 11.0 yrs £10,463
8 kW 7971 kWh 3188 kWh 4783 kWh £850 £478 £1,329 £14,615 11.0 yrs £11,958

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £996, Upfront: £11,234, 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 1993 kWh 1196 kWh 797 kWh £319 £80 £399 £5,754 14.4 yrs £2,218
3 kW 2989 kWh 1794 kWh 1196 kWh £478 £120 £598 £7,581 12.7 yrs £4,377
4 kW 3986 kWh 2391 kWh 1594 kWh £638 £159 £797 £9,407 11.8 yrs £6,537
5 kW 4982 kWh 2989 kWh 1993 kWh £797 £199 £996 £11,234 11.3 yrs £8,696
6 kW 5978 kWh 3587 kWh 2391 kWh £957 £239 £1,196 £13,061 10.9 yrs £10,855
7 kW 6975 kWh 4185 kWh 2790 kWh £1,116 £279 £1,395 £14,888 10.7 yrs £13,014
8 kW 7971 kWh 4783 kWh 3188 kWh £1,276 £319 £1,594 £16,715 10.5 yrs £15,173

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £1,080, Upfront: £12,634, Break-even: 11.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1993 kWh 1395 kWh 598 kWh £372 £60 £432 £7,154 16.6 yrs £1,483
3 kW 2989 kWh 2092 kWh 897 kWh £558 £90 £648 £8,981 13.9 yrs £3,974
4 kW 3986 kWh 2790 kWh 1196 kWh £744 £120 £864 £10,807 12.5 yrs £6,465
5 kW 4982 kWh 3487 kWh 1495 kWh £930 £149 £1,080 £12,634 11.7 yrs £8,957
6 kW 5978 kWh 4185 kWh 1794 kWh £1,116 £179 £1,295 £14,461 11.2 yrs £11,448
7 kW 6975 kWh 4882 kWh 2092 kWh £1,302 £209 £1,511 £16,288 10.8 yrs £13,940
8 kW 7971 kWh 5580 kWh 2391 kWh £1,488 £239 £1,727 £18,115 10.5 yrs £16,431

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,104, Upfront: £14,384, Break-even: 13.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1993 kWh 1455 kWh 538 kWh £388 £54 £442 £8,904 20.2 yrs £-68
3 kW 2989 kWh 2182 kWh 807 kWh £582 £81 £663 £10,731 16.2 yrs £2,523
4 kW 3986 kWh 2909 kWh 1076 kWh £776 £108 £884 £12,557 14.2 yrs £5,114
5 kW 4982 kWh 3637 kWh 1345 kWh £970 £135 £1,104 £14,384 13.0 yrs £7,705
6 kW 5978 kWh 4364 kWh 1614 kWh £1,164 £161 £1,325 £16,211 12.2 yrs £10,296
7 kW 6975 kWh 5092 kWh 1883 kWh £1,358 £188 £1,546 £18,038 11.7 yrs £12,887
8 kW 7971 kWh 5819 kWh 2152 kWh £1,552 £215 £1,767 £19,865 11.2 yrs £15,478

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,121, Upfront: £16,134, Break-even: 14.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1993 kWh 1495 kWh 498 kWh £399 £50 £448 £10,654 23.8 yrs £-1,685
3 kW 2989 kWh 2242 kWh 747 kWh £598 £75 £673 £12,481 18.6 yrs £972
4 kW 3986 kWh 2989 kWh 996 kWh £797 £100 £897 £14,307 16.0 yrs £3,630
5 kW 4982 kWh 3736 kWh 1246 kWh £997 £125 £1,121 £16,134 14.4 yrs £6,287
6 kW 5978 kWh 4484 kWh 1495 kWh £1,196 £149 £1,345 £17,961 13.4 yrs £8,945
7 kW 6975 kWh 5231 kWh 1744 kWh £1,395 £174 £1,570 £19,788 12.6 yrs £11,602
8 kW 7971 kWh 5978 kWh 1993 kWh £1,594 £199 £1,794 £21,615 12.1 yrs £14,260

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,138, Upfront: £18,584, Break-even: 16.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1993 kWh 1534 kWh 458 kWh £409 £46 £455 £13,104 28.8 yrs £-4,002
3 kW 2989 kWh 2302 kWh 688 kWh £614 £69 £683 £14,931 21.9 yrs £-1,278
4 kW 3986 kWh 3069 kWh 917 kWh £818 £92 £910 £16,757 18.4 yrs £1,446
5 kW 4982 kWh 3836 kWh 1146 kWh £1,023 £115 £1,138 £18,584 16.3 yrs £4,169
6 kW 5978 kWh 4603 kWh 1375 kWh £1,228 £138 £1,365 £20,411 15.0 yrs £6,893
7 kW 6975 kWh 5371 kWh 1604 kWh £1,432 £160 £1,593 £22,238 14.0 yrs £9,617
8 kW 7971 kWh 6138 kWh 1833 kWh £1,637 £183 £1,820 £24,065 13.2 yrs £12,341

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 1,827, 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 Croydon

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 SE25

Figures below are tailored to SE25 — click through for full league tables.

Big-Roof Britain Rank #2151 of 2182
3.6 kWp (UK avg 5.1 kWp)
~8 panels (≈430 W)
Solar Payback Index Rank #706 of 2996
9.8 years (UK avg 10.8 years)
~£830 /yr • £8,139 upfront
Standing-Charge Drag Rank #1230 of 2996
24.0% (UK avg 26.6%) drag on savings
£199 fixed • ~£830 /yr value
Aspect Penalty View ranking →
East −21.6% West −19.5%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in SE25

Monthly generation per kilowatt of solar panels

kWh 39 Jan 51 Feb 84 Mar 112 Apr 118 May 120 Jun 121 Jul 109 Aug 93 Sep 68 Oct 46 Nov 35 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.3% 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 42 kWh per month; the average month produces around 83 kWh. So a typical 4 kW home system would generate roughly 167 kWh in winter, or 332 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.67p/kWh
Daily Fixed Charge
54.45p/day
Local Sunshine
996kWh/kW
A 1 kW system generates ~996 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
3.0kW
For houses & bungalows in this area

⚠️ This area is predominantly flats. Many residents require freeholder approval for solar installations. System size shown reflects houses and bungalows only.

Local Property Data

Property Types

Houses: 37% • Flats: 57% • Bungalows: 0% Based on 10,898 properties

Coverage

Croydon (100%)

Areas Covered

South Norwood, Woodside, Thornton Heath, Crystal Palace & Upper Norwood, Selhurst, Addiscombe West, Shirley North

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

CR7 (Croydon)
≈1.7 km away
Local sunshine: ~990 kWh/kWp · -1% vs SE25
SE19 (Croydon)
≈2.2 km away
Local sunshine: ~996 kWh/kWp · -0% vs SE25
CR0 (Croydon)
≈2.7 km away
Local sunshine: ~996 kWh/kWp · -0% vs SE25
CR9 (Croydon)
≈2.8 km away
Local sunshine: ~996 kWh/kWp · -0% vs SE25
CR90 (Croydon)
≈3.3 km away
Local sunshine: ~990 kWh/kWp · -1% vs SE25
CR44 (Sutton)
≈4.1 km away
Local sunshine: ~990 kWh/kWp · -1% vs SE25

Similar sunshine across the UK

BS9 (Bristol, City of)
~996 kWh/kWp · +0% vs SE25
SE21 (Southwark)
~996 kWh/kWp · +0% vs SE25
BS49 (North Somerset)
~996 kWh/kWp · -0% vs SE25