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Solar panel cost in Mole Valley (KT22)

See realistic solar installation costs, savings and payback for KT22 (Mole Valley) 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
9.9 years
After this, it's pure profit
Upfront Cost
£9,767
What you pay to get started
Annual Benefit
£989
What you save every year
Profit Over 25 Years
£14,963
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 989 kWh/kW — 40 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 989 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)
989 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: £824, Upfront: £8,139, Break-even: 9.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1978 kWh 791 kWh 1187 kWh £211 £119 £330 £3,256 9.9 yrs £3,339
3 kW 2967 kWh 1187 kWh 1780 kWh £317 £178 £495 £4,883 9.9 yrs £5,009
4 kW 3956 kWh 1583 kWh 2374 kWh £422 £237 £659 £6,511 9.9 yrs £6,678
5 kW 4946 kWh 1978 kWh 2967 kWh £528 £297 £824 £8,139 9.9 yrs £8,348
6 kW 5935 kWh 2374 kWh 3561 kWh £633 £356 £989 £9,767 9.9 yrs £10,017
7 kW 6924 kWh 2770 kWh 4154 kWh £739 £415 £1,154 £11,394 9.9 yrs £11,687
8 kW 7913 kWh 3165 kWh 4748 kWh £844 £475 £1,319 £13,022 9.9 yrs £13,356

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: £989, Upfront: £10,239, Break-even: 10.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1978 kWh 1187 kWh 791 kWh £317 £79 £396 £5,356 13.5 yrs £2,558
3 kW 2967 kWh 1780 kWh 1187 kWh £475 £119 £594 £6,983 11.8 yrs £4,887
4 kW 3956 kWh 2374 kWh 1583 kWh £633 £158 £791 £8,611 10.9 yrs £7,216
5 kW 4946 kWh 2967 kWh 1978 kWh £791 £198 £989 £10,239 10.4 yrs £9,545
6 kW 5935 kWh 3561 kWh 2374 kWh £950 £237 £1,187 £11,867 10.0 yrs £11,874
7 kW 6924 kWh 4154 kWh 2770 kWh £1,108 £277 £1,385 £13,494 9.7 yrs £14,204
8 kW 7913 kWh 4748 kWh 3165 kWh £1,266 £317 £1,583 £15,122 9.6 yrs £16,533

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: £1,072, Upfront: £11,639, Break-even: 10.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1978 kWh 1385 kWh 593 kWh £369 £59 £429 £6,756 15.8 yrs £1,818
3 kW 2967 kWh 2077 kWh 890 kWh £554 £89 £643 £8,383 13.0 yrs £4,477
4 kW 3956 kWh 2770 kWh 1187 kWh £739 £119 £857 £10,011 11.7 yrs £7,135
5 kW 4946 kWh 3462 kWh 1484 kWh £923 £148 £1,072 £11,639 10.9 yrs £9,794
6 kW 5935 kWh 4154 kWh 1780 kWh £1,108 £178 £1,286 £13,267 10.3 yrs £12,453
7 kW 6924 kWh 4847 kWh 2077 kWh £1,293 £208 £1,500 £14,894 9.9 yrs £15,112
8 kW 7913 kWh 5539 kWh 2374 kWh £1,477 £237 £1,715 £16,522 9.6 yrs £17,771

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: £1,096, Upfront: £13,389, Break-even: 12.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1978 kWh 1444 kWh 534 kWh £385 £53 £439 £8,506 19.4 yrs £266
3 kW 2967 kWh 2166 kWh 801 kWh £578 £80 £658 £10,133 15.4 yrs £3,023
4 kW 3956 kWh 2888 kWh 1068 kWh £770 £107 £877 £11,761 13.4 yrs £5,781
5 kW 4946 kWh 3610 kWh 1335 kWh £963 £134 £1,096 £13,389 12.2 yrs £8,539
6 kW 5935 kWh 4332 kWh 1602 kWh £1,155 £160 £1,316 £15,017 11.4 yrs £11,297
7 kW 6924 kWh 5054 kWh 1869 kWh £1,348 £187 £1,535 £16,644 10.8 yrs £14,054
8 kW 7913 kWh 5776 kWh 2136 kWh £1,541 £214 £1,754 £18,272 10.4 yrs £16,812

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: £1,113, Upfront: £15,139, Break-even: 13.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1978 kWh 1484 kWh 495 kWh £396 £49 £445 £10,256 23.0 yrs £-1,353
3 kW 2967 kWh 2225 kWh 742 kWh £594 £74 £668 £11,883 17.8 yrs £1,471
4 kW 3956 kWh 2967 kWh 989 kWh £791 £99 £890 £13,511 15.2 yrs £4,295
5 kW 4946 kWh 3709 kWh 1236 kWh £989 £124 £1,113 £15,139 13.6 yrs £7,119
6 kW 5935 kWh 4451 kWh 1484 kWh £1,187 £148 £1,335 £16,767 12.6 yrs £9,942
7 kW 6924 kWh 5193 kWh 1731 kWh £1,385 £173 £1,558 £18,394 11.8 yrs £12,766
8 kW 7913 kWh 5935 kWh 1978 kWh £1,583 £198 £1,781 £20,022 11.2 yrs £15,590

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: £1,129, Upfront: £17,589, Break-even: 15.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1978 kWh 1523 kWh 455 kWh £406 £45 £452 £12,706 28.1 yrs £-3,671
3 kW 2967 kWh 2285 kWh 682 kWh £609 £68 £678 £14,333 21.2 yrs £-781
4 kW 3956 kWh 3046 kWh 910 kWh £812 £91 £903 £15,961 17.7 yrs £2,109
5 kW 4946 kWh 3808 kWh 1137 kWh £1,016 £114 £1,129 £17,589 15.6 yrs £4,998
6 kW 5935 kWh 4570 kWh 1365 kWh £1,219 £136 £1,355 £19,217 14.2 yrs £7,888
7 kW 6924 kWh 5331 kWh 1592 kWh £1,422 £159 £1,581 £20,844 13.2 yrs £10,778
8 kW 7913 kWh 6093 kWh 1820 kWh £1,625 £182 £1,807 £22,472 12.4 yrs £13,667

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 Mole Valley

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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Insights for KT22

Figures below are tailored to KT22 — click through for full league tables.

Big-Roof Britain Rank #1143 of 2182
4.9 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #853 of 2996
9.9 years (UK avg 10.8 years)
~£989 /yr • £9,767 upfront
Standing-Charge Drag Rank #589 of 2996
20.1% (UK avg 26.6%) drag on savings
£199 fixed • ~£989 /yr value
Aspect Penalty View ranking →
East −20.7% West −19.3%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in KT22

Monthly generation per kilowatt of solar panels

kWh 37 Jan 50 Feb 84 Mar 112 Apr 119 May 121 Jun 121 Jul 109 Aug 93 Sep 66 Oct 45 Nov 33 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 48.6% 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 40 kWh per month; the average month produces around 82 kWh. So a typical 4 kW home system would generate roughly 160 kWh in winter, or 330 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
26.67p/kWh
Daily Fixed Charge
54.45p/day
Local Sunshine
989kWh/kW
A 1 kW system generates ~989 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: 50% • Flats: 38% • Bungalows: 8% Based on 7,282 properties

Coverage

Mole Valley (89%)|Elmbridge (11%)

Areas Covered

Leatherhead South, Leatherhead North, Fetcham, Oxshott and Stoke D'Abernon, Bookham East & Eastwick Park, Ashtead Park, Ashtead Lanes & Common, Chessington South & Malden Rushett + 6 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

KT21 (Mole Valley)
≈2.7 km away
Local sunshine: ~989 kWh/kWp · +0% vs KT22
KT23 (Mole Valley)
≈3.3 km away
Local sunshine: ~1,002 kWh/kWp · +1% vs KT22
KT18 (Epsom and Ewell)
≈5.7 km away
Local sunshine: ~990 kWh/kWp · +0% vs KT22
KT11 (Elmbridge)
≈6.5 km away
Local sunshine: ~997 kWh/kWp · +1% vs KT22
KT20 (Reigate and Banstead)
≈6.8 km away
Local sunshine: ~998 kWh/kWp · +1% vs KT22
KT17 (Epsom and Ewell)
≈7.0 km away
Local sunshine: ~990 kWh/kWp · +0% vs KT22

Similar sunshine across the UK

SN25 (Swindon)
~989 kWh/kWp · -0% vs KT22
W8 (Kensington and Chelsea)
~989 kWh/kWp · -0% vs KT22
BS15 (South Gloucestershire)
~989 kWh/kWp · +0% vs KT22