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Solar panel cost in Kingston upon Thames (KT1)

See realistic solar installation costs, savings and payback for KT1 (Kingston upon Thames) 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
£6,988
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 997 kWh/kW — 32 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 997 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)
997 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: £831, 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 1995 kWh 798 kWh 1197 kWh £213 £120 £332 £3,654 11.0 yrs £2,996
3 kW 2992 kWh 1197 kWh 1795 kWh £319 £180 £499 £5,481 11.0 yrs £4,494
4 kW 3990 kWh 1596 kWh 2394 kWh £426 £239 £665 £7,307 11.0 yrs £5,992
5 kW 4987 kWh 1995 kWh 2992 kWh £532 £299 £831 £9,134 11.0 yrs £7,490
6 kW 5984 kWh 2394 kWh 3591 kWh £638 £359 £997 £10,961 11.0 yrs £8,988
7 kW 6982 kWh 2793 kWh 4189 kWh £745 £419 £1,164 £12,788 11.0 yrs £10,486
8 kW 7979 kWh 3192 kWh 4787 kWh £851 £479 £1,330 £14,615 11.0 yrs £11,984

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: £997, 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 1995 kWh 1197 kWh 798 kWh £319 £80 £399 £5,754 14.4 yrs £2,226
3 kW 2992 kWh 1795 kWh 1197 kWh £479 £120 £598 £7,581 12.7 yrs £4,389
4 kW 3990 kWh 2394 kWh 1596 kWh £638 £160 £798 £9,407 11.8 yrs £6,552
5 kW 4987 kWh 2992 kWh 1995 kWh £798 £199 £997 £11,234 11.3 yrs £8,716
6 kW 5984 kWh 3591 kWh 2394 kWh £958 £239 £1,197 £13,061 10.9 yrs £10,879
7 kW 6982 kWh 4189 kWh 2793 kWh £1,117 £279 £1,396 £14,888 10.7 yrs £13,042
8 kW 7979 kWh 4787 kWh 3192 kWh £1,277 £319 £1,596 £16,715 10.5 yrs £15,205

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: £1,081, 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 1995 kWh 1396 kWh 598 kWh £372 £60 £432 £7,154 16.5 yrs £1,491
3 kW 2992 kWh 2095 kWh 898 kWh £559 £90 £648 £8,981 13.9 yrs £3,987
4 kW 3990 kWh 2793 kWh 1197 kWh £745 £120 £864 £10,807 12.5 yrs £6,483
5 kW 4987 kWh 3491 kWh 1496 kWh £931 £150 £1,081 £12,634 11.7 yrs £8,978
6 kW 5984 kWh 4189 kWh 1795 kWh £1,117 £180 £1,297 £14,461 11.2 yrs £11,474
7 kW 6982 kWh 4887 kWh 2095 kWh £1,303 £209 £1,513 £16,288 10.8 yrs £13,970
8 kW 7979 kWh 5585 kWh 2394 kWh £1,490 £239 £1,729 £18,115 10.5 yrs £16,465

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: £1,106, 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 1995 kWh 1456 kWh 539 kWh £388 £54 £442 £8,904 20.1 yrs £-59
3 kW 2992 kWh 2184 kWh 808 kWh £583 £81 £663 £10,731 16.2 yrs £2,536
4 kW 3990 kWh 2912 kWh 1077 kWh £777 £108 £884 £12,557 14.2 yrs £5,132
5 kW 4987 kWh 3640 kWh 1346 kWh £971 £135 £1,106 £14,384 13.0 yrs £7,727
6 kW 5984 kWh 4369 kWh 1616 kWh £1,165 £162 £1,327 £16,211 12.2 yrs £10,322
7 kW 6982 kWh 5097 kWh 1885 kWh £1,359 £189 £1,548 £18,038 11.7 yrs £12,918
8 kW 7979 kWh 5825 kWh 2154 kWh £1,553 £215 £1,769 £19,865 11.2 yrs £15,513

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: £1,122, 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 1995 kWh 1496 kWh 499 kWh £399 £50 £449 £10,654 23.7 yrs £-1,676
3 kW 2992 kWh 2244 kWh 748 kWh £599 £75 £673 £12,481 18.5 yrs £986
4 kW 3990 kWh 2992 kWh 997 kWh £798 £100 £898 £14,307 15.9 yrs £3,648
5 kW 4987 kWh 3740 kWh 1247 kWh £998 £125 £1,122 £16,134 14.4 yrs £6,310
6 kW 5984 kWh 4488 kWh 1496 kWh £1,197 £150 £1,347 £17,961 13.3 yrs £8,971
7 kW 6982 kWh 5236 kWh 1745 kWh £1,397 £175 £1,571 £19,788 12.6 yrs £11,633
8 kW 7979 kWh 5984 kWh 1995 kWh £1,596 £199 £1,796 £21,615 12.0 yrs £14,295

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: £1,139, 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 1995 kWh 1536 kWh 459 kWh £410 £46 £456 £13,104 28.8 yrs £-3,993
3 kW 2992 kWh 2304 kWh 688 kWh £614 £69 £683 £14,931 21.9 yrs £-1,265
4 kW 3990 kWh 3072 kWh 918 kWh £819 £92 £911 £16,757 18.4 yrs £1,464
5 kW 4987 kWh 3840 kWh 1147 kWh £1,024 £115 £1,139 £18,584 16.3 yrs £4,192
6 kW 5984 kWh 4608 kWh 1376 kWh £1,229 £138 £1,367 £20,411 14.9 yrs £6,921
7 kW 6982 kWh 5376 kWh 1606 kWh £1,434 £161 £1,594 £22,238 13.9 yrs £9,649
8 kW 7979 kWh 6144 kWh 1835 kWh £1,639 £184 £1,822 £24,065 13.2 yrs £12,377

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 Kingston upon Thames

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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Insights for KT1

Figures below are tailored to KT1 — click through for full league tables.

Big-Roof Britain Rank #2039 of 2182
4.0 kWp (UK avg 5.1 kWp)
~8 panels (≈430 W)
Solar Payback Index Rank #631 of 2996
9.8 years (UK avg 10.8 years)
~£831 /yr • £8,139 upfront
Standing-Charge Drag Rank #1177 of 2996
23.9% (UK avg 26.6%) drag on savings
£199 fixed • ~£831 /yr value
Aspect Penalty View ranking →
East −21.6% West −19.4%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in KT1

Monthly generation per kilowatt of solar panels

kWh 39 Jan 51 Feb 85 Mar 112 Apr 118 May 121 Jun 122 Jul 109 Aug 93 Sep 68 Oct 46 Nov 35 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 50.1% 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
997kWh/kW
A 1 kW system generates ~997 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: 31% • Flats: 61% • Bungalows: 1% Based on 8,323 properties

Coverage

Kingston upon Thames (92%)|Richmond upon Thames (8%)

Areas Covered

Norbiton, Kingston Town, Hampton Wick & South Teddington, Coombe Vale, St Mark's & Seething Wells, Kingston Gate, Teddington, Canbury Gardens

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

KT2 (Kingston upon Thames)
≈1.2 km away
Local sunshine: ~997 kWh/kWp · -0% vs KT1
KT5 (Kingston upon Thames)
≈1.5 km away
Local sunshine: ~997 kWh/kWp · -0% vs KT1
KT6 (Kingston upon Thames)
≈1.9 km away
Local sunshine: ~998 kWh/kWp · +0% vs KT1
KT7 (Elmbridge)
≈3.4 km away
Local sunshine: ~998 kWh/kWp · +0% vs KT1
TW11 (Richmond upon Thames)
≈3.6 km away
Local sunshine: ~998 kWh/kWp · +0% vs KT1
KT9 (Kingston upon Thames)
≈4.4 km away
Local sunshine: ~998 kWh/kWp · +0% vs KT1

Similar sunshine across the UK

HU19 (East Riding of Yorkshire)
~997 kWh/kWp · -0% vs KT1
NN14 (North Northamptonshire)
~997 kWh/kWp · -0% vs KT1
AL6 (Welwyn Hatfield)
~997 kWh/kWp · -0% vs KT1