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Solar panel cost in Greenwich (SE10)

See realistic solar installation costs, savings and payback for SE10 (Greenwich) 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
£499
What you save every year
Profit Over 25 Years
£6,996
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 1006 kWh/kW — 15 above the regional median (991).

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 1006 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)
1006 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: £832, 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 2011 kWh 805 kWh 1207 kWh £212 £121 £333 £3,654 11.0 yrs £3,000
3 kW 3017 kWh 1207 kWh 1810 kWh £318 £181 £499 £5,481 11.0 yrs £4,500
4 kW 4023 kWh 1609 kWh 2414 kWh £424 £241 £665 £7,307 11.0 yrs £6,001
5 kW 5029 kWh 2011 kWh 3017 kWh £530 £302 £832 £9,134 11.0 yrs £7,501
6 kW 6034 kWh 2414 kWh 3621 kWh £636 £362 £998 £10,961 11.0 yrs £9,001
7 kW 7040 kWh 2816 kWh 4224 kWh £742 £422 £1,164 £12,788 11.0 yrs £10,501
8 kW 8046 kWh 3218 kWh 4828 kWh £848 £483 £1,331 £14,615 11.0 yrs £12,001

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 2011 kWh 1207 kWh 805 kWh £318 £80 £398 £5,754 14.4 yrs £2,216
3 kW 3017 kWh 1810 kWh 1207 kWh £477 £121 £598 £7,581 12.7 yrs £4,374
4 kW 4023 kWh 2414 kWh 1609 kWh £636 £161 £797 £9,407 11.8 yrs £6,532
5 kW 5029 kWh 3017 kWh 2011 kWh £795 £201 £996 £11,234 11.3 yrs £8,690
6 kW 6034 kWh 3621 kWh 2414 kWh £954 £241 £1,195 £13,061 10.9 yrs £10,847
7 kW 7040 kWh 4224 kWh 2816 kWh £1,113 £282 £1,395 £14,888 10.7 yrs £13,005
8 kW 8046 kWh 4828 kWh 3218 kWh £1,272 £322 £1,594 £16,715 10.5 yrs £15,163

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: £1,078, 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 2011 kWh 1408 kWh 603 kWh £371 £60 £431 £7,154 16.6 yrs £1,474
3 kW 3017 kWh 2112 kWh 905 kWh £557 £91 £647 £8,981 13.9 yrs £3,960
4 kW 4023 kWh 2816 kWh 1207 kWh £742 £121 £863 £10,807 12.5 yrs £6,447
5 kW 5029 kWh 3520 kWh 1509 kWh £928 £151 £1,078 £12,634 11.7 yrs £8,934
6 kW 6034 kWh 4224 kWh 1810 kWh £1,113 £181 £1,294 £14,461 11.2 yrs £11,421
7 kW 7040 kWh 4928 kWh 2112 kWh £1,299 £211 £1,510 £16,288 10.8 yrs £13,907
8 kW 8046 kWh 5632 kWh 2414 kWh £1,484 £241 £1,725 £18,115 10.5 yrs £16,394

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: £1,103, 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 2011 kWh 1468 kWh 543 kWh £387 £54 £441 £8,904 20.2 yrs £-79
3 kW 3017 kWh 2203 kWh 815 kWh £580 £81 £662 £10,731 16.2 yrs £2,506
4 kW 4023 kWh 2937 kWh 1086 kWh £774 £109 £882 £12,557 14.2 yrs £5,092
5 kW 5029 kWh 3671 kWh 1358 kWh £967 £136 £1,103 £14,384 13.0 yrs £7,677
6 kW 6034 kWh 4405 kWh 1629 kWh £1,161 £163 £1,324 £16,211 12.2 yrs £10,263
7 kW 7040 kWh 5139 kWh 1901 kWh £1,354 £190 £1,544 £18,038 11.7 yrs £12,848
8 kW 8046 kWh 5874 kWh 2172 kWh £1,548 £217 £1,765 £19,865 11.3 yrs £15,434

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: £1,120, 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 2011 kWh 1509 kWh 503 kWh £398 £50 £448 £10,654 23.8 yrs £-1,698
3 kW 3017 kWh 2263 kWh 754 kWh £596 £75 £672 £12,481 18.6 yrs £954
4 kW 4023 kWh 3017 kWh 1006 kWh £795 £101 £896 £14,307 16.0 yrs £3,605
5 kW 5029 kWh 3772 kWh 1257 kWh £994 £126 £1,120 £16,134 14.4 yrs £6,256
6 kW 6034 kWh 4526 kWh 1509 kWh £1,193 £151 £1,343 £17,961 13.4 yrs £8,907
7 kW 7040 kWh 5280 kWh 1760 kWh £1,391 £176 £1,567 £19,788 12.6 yrs £11,559
8 kW 8046 kWh 6034 kWh 2011 kWh £1,590 £201 £1,791 £21,615 12.1 yrs £14,210

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: £1,136, Upfront: £18,584, Break-even: 16.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2011 kWh 1549 kWh 463 kWh £408 £46 £454 £13,104 28.8 yrs £-4,016
3 kW 3017 kWh 2323 kWh 694 kWh £612 £69 £682 £14,931 21.9 yrs £-1,299
4 kW 4023 kWh 3098 kWh 925 kWh £816 £93 £909 £16,757 18.4 yrs £1,418
5 kW 5029 kWh 3872 kWh 1157 kWh £1,020 £116 £1,136 £18,584 16.4 yrs £4,135
6 kW 6034 kWh 4647 kWh 1388 kWh £1,224 £139 £1,363 £20,411 15.0 yrs £6,852
7 kW 7040 kWh 5421 kWh 1619 kWh £1,428 £162 £1,590 £22,238 14.0 yrs £9,569
8 kW 8046 kWh 6195 kWh 1851 kWh £1,632 £185 £1,818 £24,065 13.2 yrs £12,286

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 Greenwich

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.

Compare solar quotes before you sign

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 SE10

Figures below are tailored to SE10 — click through for full league tables.

Big-Roof Britain Rank #2064 of 2182
4.0 kWp (UK avg 5.1 kWp)
~8 panels (≈430 W)
Solar Payback Index Rank #702 of 2996
9.8 years (UK avg 10.8 years)
~£832 /yr • £8,139 upfront
Standing-Charge Drag Rank #437 of 2996
19.6% (UK avg 26.6%) drag on savings
£163 fixed • ~£832 /yr value
Aspect Penalty View ranking →
East −21.8% West −19.8%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in SE10

Monthly generation per kilowatt of solar panels

kWh 40 Jan 52 Feb 85 Mar 112 Apr 119 May 121 Jun 123 Jul 110 Aug 94 Sep 68 Oct 47 Nov 36 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.8% 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 84 kWh. So a typical 4 kW home system would generate roughly 170 kWh in winter, or 335 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.35p/kWh
Daily Fixed Charge
44.78p/day
Local Sunshine
1006kWh/kW
A 1 kW system generates ~1006 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
3.0kW
For eligible homes 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: 15% • Flats: 80% • Bungalows: 0% Based on 16,931 properties

Coverage

Greenwich (95%)|Lewisham (5%)

Areas Covered

Greenwich Peninsula, East Greenwich, Greenwich Park, Greenwich Creekside, Blackheath, Blackheath Westcombe

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

SE7 (Greenwich)
≈1.9 km away
Local sunshine: ~1,006 kWh/kWp · -0% vs SE10
SE8 (Lewisham)
≈2.0 km away
Local sunshine: ~994 kWh/kWp · -1% vs SE10
SE3 (Greenwich)
≈2.2 km away
Local sunshine: ~1,005 kWh/kWp · -0% vs SE10
E22 (Tower Hamlets)
≈2.6 km away
Local sunshine: ~991 kWh/kWp · -1% vs SE10
SE13 (Lewisham)
≈3.0 km away
Local sunshine: ~993 kWh/kWp · -1% vs SE10
E16 (Newham)
≈3.4 km away
Local sunshine: ~1,004 kWh/kWp · -0% vs SE10

Similar sunshine across the UK

RH8 (Tandridge)
~1,006 kWh/kWp · -0% vs SE10
SA15 (Carmarthenshire)
~1,006 kWh/kWp · -0% vs SE10
PE16 (Fenland)
~1,006 kWh/kWp · +0% vs SE10