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Solar panel cost in Folkestone and Hythe (TN29)

See realistic solar installation costs, savings and payback for TN29 (Folkestone and Hythe) 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
11.8 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£1,038
What you save every year
Profit Over 25 Years
£13,749
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: Bigger systems don’t shorten payback—cost and savings rise together per kW.
  • 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

Costs: Battery prices are typically £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 23.53p/kWh with a 54.74p/day standing charge. Your postcode’s south-facing sunshine yield is 1123 kWh/kW — 94 above 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 1123 kWh per year on a south-facing roof. We value self-used electricity at 23.5p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
23.5p/kWh
Standing charge
54.7p/day
Sunshine yield (south)
1123 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: £865, Upfront: £10,173, Break-even: 11.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2246 kWh 898 kWh 1347 kWh £211 £135 £346 £4,069 11.8 yrs £2,853
3 kW 3368 kWh 1347 kWh 2021 kWh £317 £202 £519 £6,104 11.8 yrs £4,279
4 kW 4491 kWh 1796 kWh 2695 kWh £423 £269 £692 £8,138 11.8 yrs £5,705
5 kW 5614 kWh 2246 kWh 3368 kWh £528 £337 £865 £10,173 11.8 yrs £7,131
6 kW 6737 kWh 2695 kWh 4042 kWh £634 £404 £1,038 £12,207 11.8 yrs £8,558
7 kW 7859 kWh 3144 kWh 4716 kWh £740 £472 £1,211 £14,242 11.8 yrs £9,984
8 kW 8982 kWh 3593 kWh 5389 kWh £845 £539 £1,384 £16,276 11.8 yrs £11,410

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £1,017, Upfront: £12,273, Break-even: 12.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2246 kWh 1347 kWh 898 kWh £317 £90 £407 £6,169 15.2 yrs £1,968
3 kW 3368 kWh 2021 kWh 1347 kWh £476 £135 £610 £8,204 13.4 yrs £4,002
4 kW 4491 kWh 2695 kWh 1796 kWh £634 £180 £814 £10,238 12.6 yrs £6,036
5 kW 5614 kWh 3368 kWh 2246 kWh £793 £225 £1,017 £12,273 12.1 yrs £8,070
6 kW 6737 kWh 4042 kWh 2695 kWh £951 £269 £1,221 £14,307 11.7 yrs £10,104
7 kW 7859 kWh 4716 kWh 3144 kWh £1,110 £314 £1,424 £16,342 11.5 yrs £12,137
8 kW 8982 kWh 5389 kWh 3593 kWh £1,268 £359 £1,627 £18,376 11.3 yrs £14,171

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £1,093, Upfront: £13,673, Break-even: 12.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2246 kWh 1572 kWh 674 kWh £370 £67 £437 £7,569 17.3 yrs £1,175
3 kW 3368 kWh 2358 kWh 1010 kWh £555 £101 £656 £9,604 14.6 yrs £3,513
4 kW 4491 kWh 3144 kWh 1347 kWh £740 £135 £874 £11,638 13.3 yrs £5,851
5 kW 5614 kWh 3930 kWh 1684 kWh £925 £168 £1,093 £13,673 12.5 yrs £8,189
6 kW 6737 kWh 4716 kWh 2021 kWh £1,110 £202 £1,312 £15,707 12.0 yrs £10,526
7 kW 7859 kWh 5502 kWh 2358 kWh £1,295 £236 £1,530 £17,742 11.6 yrs £12,864
8 kW 8982 kWh 6287 kWh 2695 kWh £1,479 £269 £1,749 £19,776 11.3 yrs £15,202

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £1,116, Upfront: £15,423, Break-even: 13.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2246 kWh 1639 kWh 606 kWh £386 £61 £446 £9,319 20.9 yrs £-392
3 kW 3368 kWh 2459 kWh 909 kWh £579 £91 £670 £11,354 17.0 yrs £2,037
4 kW 4491 kWh 3278 kWh 1213 kWh £771 £121 £893 £13,388 15.0 yrs £4,466
5 kW 5614 kWh 4098 kWh 1516 kWh £964 £152 £1,116 £15,423 13.8 yrs £6,894
6 kW 6737 kWh 4918 kWh 1819 kWh £1,157 £182 £1,339 £17,457 13.0 yrs £9,323
7 kW 7859 kWh 5737 kWh 2122 kWh £1,350 £212 £1,562 £19,492 12.5 yrs £11,752
8 kW 8982 kWh 6557 kWh 2425 kWh £1,543 £243 £1,785 £21,526 12.1 yrs £14,181

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £1,131, Upfront: £17,173, Break-even: 15.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2246 kWh 1684 kWh 561 kWh £396 £56 £452 £11,069 24.5 yrs £-2,021
3 kW 3368 kWh 2526 kWh 842 kWh £594 £84 £679 £13,104 19.3 yrs £469
4 kW 4491 kWh 3368 kWh 1123 kWh £793 £112 £905 £15,138 16.7 yrs £2,959
5 kW 5614 kWh 4210 kWh 1403 kWh £991 £140 £1,131 £17,173 15.2 yrs £5,448
6 kW 6737 kWh 5052 kWh 1684 kWh £1,189 £168 £1,357 £19,207 14.2 yrs £7,938
7 kW 7859 kWh 5894 kWh 1965 kWh £1,387 £196 £1,583 £21,242 13.4 yrs £10,428
8 kW 8982 kWh 6737 kWh 2246 kWh £1,585 £225 £1,810 £23,276 12.9 yrs £12,917

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,146, Upfront: £19,623, Break-even: 17.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2246 kWh 1729 kWh 516 kWh £407 £52 £458 £13,519 29.5 yrs £-4,349
3 kW 3368 kWh 2594 kWh 775 kWh £610 £77 £688 £15,554 22.6 yrs £-1,799
4 kW 4491 kWh 3458 kWh 1033 kWh £814 £103 £917 £17,588 19.2 yrs £752
5 kW 5614 kWh 4323 kWh 1291 kWh £1,017 £129 £1,146 £19,623 17.1 yrs £3,302
6 kW 6737 kWh 5187 kWh 1549 kWh £1,221 £155 £1,375 £21,657 15.7 yrs £5,852
7 kW 7859 kWh 6052 kWh 1808 kWh £1,424 £181 £1,605 £23,692 14.8 yrs £8,403
8 kW 8982 kWh 6916 kWh 2066 kWh £1,627 £207 £1,834 £25,726 14.0 yrs £10,953

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, 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.

Insights for TN29

Figures below are tailored to TN29 — click through for full league tables.

Big-Roof Britain Rank #228 of 2182
6.1 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #31 of 2997
10.5 years (UK avg 12.6 years)
~£1,166 /yr • £12,207 upfront
Standing-Charge Drag Rank #45 of 2997
15.2% (UK avg 24.6%) drag on savings
£178 fixed • ~£1,166 /yr value
Aspect Penalty View ranking →
East −20.5% West −22.8%
Typical output loss versus a south-facing roof (lower is better)

Seasonal solar output in TN29

Monthly generation per kilowatt of solar panels

kWh 42 Jan 57 Feb 96 Mar 128 Apr 134 May 139 Jun 139 Jul 124 Aug 105 Sep 74 Oct 48 Nov 37 Dec
Best month Worst month Winter (Dec–Feb) Other months

Winter output: 48.6% of an average month (Dec–Feb)

Best / worst month: Jun / Dec

These figures show output per kilowatt (kW) of panels installed. In winter, a 1 kW system here produces about 45 kWh per month; the average month produces around 94 kWh. So a typical 4 kW home system would generate roughly 182 kWh in winter, or 374 kWh in an average month.

Your Area at a Glance

Your Electricity Rate
23.53p/kWh
Daily Fixed Charge
54.74p/day
Local Sunshine
1123kWh/kW
A 1 kW system generates ~1123 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: 54% • Flats: 6% • Bungalows: 39% Based on 3,696 properties

Coverage

Folkestone and Hythe (100%)

Areas Covered

Walland & Denge Marsh, Romney Marsh, New Romney

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q1 2026

Installation costs: MCS certified installer data, March 2025

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

TN28 (Folkestone and Hythe)
≈2.3 km away
Local sunshine: ~1,139 kWh/kWp · +1% vs TN29
CT21 (Folkestone and Hythe)
≈13.0 km away
Local sunshine: ~1,090 kWh/kWp · -3% vs TN29
TN26 (Ashford)
≈13.7 km away
Local sunshine: ~1,088 kWh/kWp · -3% vs TN29
TN25 (Ashford)
≈14.4 km away
Local sunshine: ~1,059 kWh/kWp · -6% vs TN29
TN31 (Rother)
≈15.2 km away
Local sunshine: ~1,104 kWh/kWp · -2% vs TN29
TN23 (Ashford)
≈16.0 km away
Local sunshine: ~1,088 kWh/kWp · -3% vs TN29

Similar sunshine across the UK

TQ7 (South Hams)
~1,123 kWh/kWp · +0% vs TN29
PO20 (Chichester)
~1,122 kWh/kWp · -0% vs TN29
PO38 (Isle of Wight)
~1,125 kWh/kWp · +0% vs TN29