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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in TN6 (Wealden)

See if solar pays off for you in Wealden — 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
11.8 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£1,032
What you save every year
Profit Over 25 Years
£13,603
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 26.92p/kWh with a 47.60p/day standing charge. Your postcode’s south-facing sunshine yield is 1026 kWh/kW — 3 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 1026 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)
1026 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: £860, 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 2052 kWh 821 kWh 1231 kWh £221 £123 £344 £4,069 11.8 yrs £2,814
3 kW 3079 kWh 1231 kWh 1847 kWh £331 £185 £516 £6,104 11.8 yrs £4,221
4 kW 4105 kWh 1642 kWh 2463 kWh £442 £246 £688 £8,138 11.8 yrs £5,628
5 kW 5131 kWh 2052 kWh 3079 kWh £552 £308 £860 £10,173 11.8 yrs £7,034
6 kW 6157 kWh 2463 kWh 3694 kWh £663 £369 £1,032 £12,207 11.8 yrs £8,441
7 kW 7183 kWh 2873 kWh 4310 kWh £773 £431 £1,204 £14,242 11.8 yrs £9,848
8 kW 8209 kWh 3284 kWh 4926 kWh £884 £493 £1,377 £16,276 11.8 yrs £11,255

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: £1,034, Upfront: £12,273, Break-even: 11.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2052 kWh 1231 kWh 821 kWh £331 £82 £414 £6,169 14.9 yrs £2,103
3 kW 3079 kWh 1847 kWh 1231 kWh £497 £123 £620 £8,204 13.2 yrs £4,204
4 kW 4105 kWh 2463 kWh 1642 kWh £663 £164 £827 £10,238 12.4 yrs £6,306
5 kW 5131 kWh 3079 kWh 2052 kWh £829 £205 £1,034 £12,273 11.9 yrs £8,407
6 kW 6157 kWh 3694 kWh 2463 kWh £994 £246 £1,241 £14,307 11.5 yrs £10,508
7 kW 7183 kWh 4310 kWh 2873 kWh £1,160 £287 £1,448 £16,342 11.3 yrs £12,610
8 kW 8209 kWh 4926 kWh 3284 kWh £1,326 £328 £1,654 £18,376 11.1 yrs £14,711

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: £1,121, Upfront: £13,673, 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 2052 kWh 1437 kWh 616 kWh £387 £62 £448 £7,569 16.9 yrs £1,397
3 kW 3079 kWh 2155 kWh 924 kWh £580 £92 £672 £9,604 14.3 yrs £3,846
4 kW 4105 kWh 2873 kWh 1231 kWh £773 £123 £897 £11,638 13.0 yrs £6,295
5 kW 5131 kWh 3592 kWh 1539 kWh £967 £154 £1,121 £13,673 12.2 yrs £8,743
6 kW 6157 kWh 4310 kWh 1847 kWh £1,160 £185 £1,345 £15,707 11.7 yrs £11,192
7 kW 7183 kWh 5028 kWh 2155 kWh £1,354 £215 £1,569 £17,742 11.3 yrs £13,641
8 kW 8209 kWh 5747 kWh 2463 kWh £1,547 £246 £1,793 £19,776 11.0 yrs £16,089

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: £1,147, Upfront: £15,423, Break-even: 13.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2052 kWh 1498 kWh 554 kWh £403 £55 £459 £9,319 20.3 yrs £-144
3 kW 3079 kWh 2247 kWh 831 kWh £605 £83 £688 £11,354 16.5 yrs £2,409
4 kW 4105 kWh 2996 kWh 1108 kWh £807 £111 £917 £13,388 14.6 yrs £4,961
5 kW 5131 kWh 3746 kWh 1385 kWh £1,008 £139 £1,147 £15,423 13.4 yrs £7,514
6 kW 6157 kWh 4495 kWh 1662 kWh £1,210 £166 £1,376 £17,457 12.7 yrs £10,067
7 kW 7183 kWh 5244 kWh 1939 kWh £1,412 £194 £1,606 £19,492 12.1 yrs £12,620
8 kW 8209 kWh 5993 kWh 2217 kWh £1,613 £222 £1,835 £21,526 11.7 yrs £15,173

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: £1,164, Upfront: £17,173, Break-even: 14.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2052 kWh 1539 kWh 513 kWh £414 £51 £466 £11,069 23.8 yrs £-1,755
3 kW 3079 kWh 2309 kWh 770 kWh £622 £77 £699 £13,104 18.8 yrs £867
4 kW 4105 kWh 3079 kWh 1026 kWh £829 £103 £931 £15,138 16.3 yrs £3,489
5 kW 5131 kWh 3848 kWh 1283 kWh £1,036 £128 £1,164 £17,173 14.8 yrs £6,111
6 kW 6157 kWh 4618 kWh 1539 kWh £1,243 £154 £1,397 £19,207 13.7 yrs £8,734
7 kW 7183 kWh 5387 kWh 1796 kWh £1,450 £180 £1,630 £21,242 13.0 yrs £11,356
8 kW 8209 kWh 6157 kWh 2052 kWh £1,657 £205 £1,863 £23,276 12.5 yrs £13,978

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: £1,182, Upfront: £19,623, Break-even: 16.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2052 kWh 1580 kWh 472 kWh £425 £47 £473 £13,519 28.6 yrs £-4,067
3 kW 3079 kWh 2370 kWh 708 kWh £638 £71 £709 £15,554 21.9 yrs £-1,375
4 kW 4105 kWh 3161 kWh 944 kWh £851 £94 £945 £17,588 18.6 yrs £1,317
5 kW 5131 kWh 3951 kWh 1180 kWh £1,064 £118 £1,182 £19,623 16.6 yrs £4,009
6 kW 6157 kWh 4741 kWh 1416 kWh £1,276 £142 £1,418 £21,657 15.3 yrs £6,700
7 kW 7183 kWh 5531 kWh 1652 kWh £1,489 £165 £1,654 £23,692 14.3 yrs £9,392
8 kW 8209 kWh 6321 kWh 1888 kWh £1,702 £189 £1,891 £25,726 13.6 yrs £12,084

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 TN6

Figures below are tailored to TN6 — click through for full league tables.

Big-Roof Britain Rank #395 of 2182
5.7 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #371 of 2997
10.3 years (UK avg 11.3 years)
~£1,189 /yr • £12,207 upfront
Standing-Charge Drag Rank #195 of 2997
14.6% (UK avg 21.7%) drag on savings
£174 fixed • ~£1,189 /yr value

Your Area at a Glance

Your Electricity Rate
26.92p/kWh
Daily Fixed Charge
47.60p/day
Local Sunshine
1026kWh/kW
A 1 kW system generates ~1026 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: 70% • Flats: 18% • Bungalows: 10% Based on 6,749 properties

Coverage

Wealden (100%)

Areas Covered

Crowborough Central, Crowborough North, Crowborough South East, Crowborough Jarvis Brook, Hadlow Down & Rotherfield, Crowborough St Johns, Crowborough South West, Hartfield + 4 more

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

TN7 (Wealden)
≈5.9 km away
Local sunshine: ~1,019 kWh/kWp · -1% vs TN6
TN20 (Wealden)
≈7.8 km away
Local sunshine: ~1,041 kWh/kWp · +1% vs TN6
TN3 (Tunbridge Wells)
≈9.3 km away
Local sunshine: ~1,023 kWh/kWp · -0% vs TN6
RH18 (Wealden)
≈10.2 km away
Local sunshine: ~1,019 kWh/kWp · -1% vs TN6
TN22 (Wealden)
≈10.3 km away
Local sunshine: ~1,055 kWh/kWp · +3% vs TN6
TN1 (Tunbridge Wells)
≈11.4 km away
Local sunshine: ~1,029 kWh/kWp · +0% vs TN6

Similar sunshine across the UK

EX7 (Teignbridge)
~1,027 kWh/kWp · +0% vs TN6
PL14 (Cornwall)
~1,026 kWh/kWp · -0% vs TN6
TR10 (Cornwall)
~1,027 kWh/kWp · +0% vs TN6