Solar explained to clever people by people who are not trying to be clever
Home Regions
Insights
Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in TN28 (Folkestone and Hythe)

See if solar pays off for you in Folkestone and Hythe — price, savings and payback in under a minute (official UK data).

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
10.7 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£1,146
What you save every year
Profit Over 25 Years
£16,434
After paying itself off, you're this much ahead

Ready to Get Started?

Get your free quote from Blue Ape Renewables. They'll connect you with MCS-certified installers in your area and handle all the paperwork.

Get Solar Quote →
4.8★ Trustpilot • Octopus Energy trusted partner • MCS certified • No obligation
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 26.92p/kWh with a 47.60p/day standing charge. Your postcode’s south-facing sunshine yield is 1139 kWh/kW — 110 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 1139 kWh per year on a south-facing roof. We value self-used electricity at 26.9p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.9p/kWh
Standing charge
47.6p/day
Sunshine yield (south)
1139 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: £955, Upfront: £10,173, Break-even: 10.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2277 kWh 911 kWh 1366 kWh £245 £137 £382 £4,069 10.7 yrs £3,568
3 kW 3416 kWh 1366 kWh 2050 kWh £368 £205 £573 £6,104 10.7 yrs £5,353
4 kW 4555 kWh 1822 kWh 2733 kWh £490 £273 £764 £8,138 10.7 yrs £7,137
5 kW 5694 kWh 2277 kWh 3416 kWh £613 £342 £955 £10,173 10.7 yrs £8,921
6 kW 6832 kWh 2733 kWh 4099 kWh £736 £410 £1,146 £12,207 10.7 yrs £10,705
7 kW 7971 kWh 3188 kWh 4783 kWh £858 £478 £1,337 £14,242 10.7 yrs £12,490
8 kW 9110 kWh 3644 kWh 5466 kWh £981 £547 £1,527 £16,276 10.7 yrs £14,274

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: £1,147, Upfront: £12,273, Break-even: 10.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2277 kWh 1366 kWh 911 kWh £368 £91 £459 £6,169 13.4 yrs £3,010
3 kW 3416 kWh 2050 kWh 1366 kWh £552 £137 £688 £8,204 11.9 yrs £5,565
4 kW 4555 kWh 2733 kWh 1822 kWh £736 £182 £918 £10,238 11.2 yrs £8,120
5 kW 5694 kWh 3416 kWh 2277 kWh £920 £228 £1,147 £12,273 10.7 yrs £10,675
6 kW 6832 kWh 4099 kWh 2733 kWh £1,104 £273 £1,377 £14,307 10.4 yrs £13,229
7 kW 7971 kWh 4783 kWh 3188 kWh £1,287 £319 £1,606 £16,342 10.2 yrs £15,784
8 kW 9110 kWh 5466 kWh 3644 kWh £1,471 £364 £1,836 £18,376 10.0 yrs £18,339

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: £1,244, Upfront: £13,673, 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 2277 kWh 1594 kWh 683 kWh £429 £68 £497 £7,569 15.2 yrs £2,380
3 kW 3416 kWh 2391 kWh 1025 kWh £644 £102 £746 £9,604 12.9 yrs £5,321
4 kW 4555 kWh 3188 kWh 1366 kWh £858 £137 £995 £11,638 11.7 yrs £8,261
5 kW 5694 kWh 3985 kWh 1708 kWh £1,073 £171 £1,244 £13,673 11.0 yrs £11,201
6 kW 6832 kWh 4783 kWh 2050 kWh £1,287 £205 £1,492 £15,707 10.5 yrs £14,141
7 kW 7971 kWh 5580 kWh 2391 kWh £1,502 £239 £1,741 £17,742 10.2 yrs £17,082
8 kW 9110 kWh 6377 kWh 2733 kWh £1,717 £273 £1,990 £19,776 9.9 yrs £20,022

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: £1,273, Upfront: £15,423, 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 2277 kWh 1663 kWh 615 kWh £448 £61 £509 £9,319 18.3 yrs £862
3 kW 3416 kWh 2494 kWh 922 kWh £671 £92 £764 £11,354 14.9 yrs £3,918
4 kW 4555 kWh 3325 kWh 1230 kWh £895 £123 £1,018 £13,388 13.2 yrs £6,973
5 kW 5694 kWh 4156 kWh 1537 kWh £1,119 £154 £1,273 £15,423 12.1 yrs £10,029
6 kW 6832 kWh 4988 kWh 1845 kWh £1,343 £184 £1,527 £17,457 11.4 yrs £13,085
7 kW 7971 kWh 5819 kWh 2152 kWh £1,566 £215 £1,782 £19,492 10.9 yrs £16,141
8 kW 9110 kWh 6650 kWh 2460 kWh £1,790 £246 £2,036 £21,526 10.6 yrs £19,197

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: £1,292, Upfront: £17,173, Break-even: 13.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2277 kWh 1708 kWh 569 kWh £460 £57 £517 £11,069 21.4 yrs £-734
3 kW 3416 kWh 2562 kWh 854 kWh £690 £85 £775 £13,104 16.9 yrs £2,399
4 kW 4555 kWh 3416 kWh 1139 kWh £920 £114 £1,033 £15,138 14.6 yrs £5,532
5 kW 5694 kWh 4270 kWh 1423 kWh £1,150 £142 £1,292 £17,173 13.3 yrs £8,665
6 kW 6832 kWh 5124 kWh 1708 kWh £1,379 £171 £1,550 £19,207 12.4 yrs £11,797
7 kW 7971 kWh 5978 kWh 1993 kWh £1,609 £199 £1,809 £21,242 11.7 yrs £14,930
8 kW 9110 kWh 6832 kWh 2277 kWh £1,839 £228 £2,067 £23,276 11.3 yrs £18,063

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: £1,311, Upfront: £19,623, Break-even: 15.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2277 kWh 1754 kWh 524 kWh £472 £52 £524 £13,519 25.8 yrs £-3,030
3 kW 3416 kWh 2630 kWh 786 kWh £708 £79 £787 £15,554 19.8 yrs £180
4 kW 4555 kWh 3507 kWh 1048 kWh £944 £105 £1,049 £17,588 16.8 yrs £3,390
5 kW 5694 kWh 4384 kWh 1310 kWh £1,180 £131 £1,311 £19,623 15.0 yrs £6,600
6 kW 6832 kWh 5261 kWh 1571 kWh £1,416 £157 £1,573 £21,657 13.8 yrs £9,810
7 kW 7971 kWh 6138 kWh 1833 kWh £1,652 £183 £1,836 £23,692 12.9 yrs £13,020
8 kW 9110 kWh 7014 kWh 2095 kWh £1,888 £210 £2,098 £25,726 12.3 yrs £16,230

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 TN28

Figures below are tailored to TN28 — click through for full league tables.

Big-Roof Britain Rank #239 of 2182
6.0 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #11 of 2997
9.3 years (UK avg 11.3 years)
~£1,319 /yr • £12,207 upfront
Standing-Charge Drag Rank #30 of 2997
13.2% (UK avg 21.7%) drag on savings
£174 fixed • ~£1,319 /yr value

Your Area at a Glance

Your Electricity Rate
26.92p/kWh
Daily Fixed Charge
47.60p/day
Local Sunshine
1139kWh/kW
A 1 kW system generates ~1139 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: 57% • Flats: 15% • Bungalows: 26% Based on 2,642 properties

Coverage

Folkestone and Hythe (100%)

Areas Covered

New Romney, Walland & Denge Marsh, Romney Marsh

Data Sources & Assumptions

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

Electricity rates: Ofgem price cap, Q4 2025

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

TN29 (Folkestone and Hythe)
≈2.3 km away
Local sunshine: ~1,123 kWh/kWp · -1% vs TN28
CT21 (Folkestone and Hythe)
≈13.6 km away
Local sunshine: ~1,090 kWh/kWp · -4% vs TN28
TN31 (Rother)
≈15.4 km away
Local sunshine: ~1,104 kWh/kWp · -3% vs TN28
TN26 (Ashford)
≈15.9 km away
Local sunshine: ~1,088 kWh/kWp · -4% vs TN28
TN25 (Ashford)
≈16.5 km away
Local sunshine: ~1,059 kWh/kWp · -7% vs TN28
CT50 (Folkestone and Hythe)
≈17.4 km away
Local sunshine: ~1,111 kWh/kWp · -2% vs TN28

Similar sunshine across the UK

PO19 (Chichester)
~1,138 kWh/kWp · -0% vs TN28
PO30 (Isle of Wight)
~1,133 kWh/kWp · -1% vs TN28
PO10 (Havant)
~1,133 kWh/kWp · -1% vs TN28