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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in TN36 (Rother)

See if solar pays off for you in Rother — 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
11.0 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£1,110
What you save every year
Profit Over 25 Years
£15,548
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 1103 kWh/kW — 74 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 1103 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)
1103 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: £925, Upfront: £10,173, 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 2207 kWh 883 kWh 1324 kWh £238 £132 £370 £4,069 11.0 yrs £3,332
3 kW 3310 kWh 1324 kWh 1986 kWh £356 £199 £555 £6,104 11.0 yrs £4,998
4 kW 4414 kWh 1766 kWh 2648 kWh £475 £265 £740 £8,138 11.0 yrs £6,664
5 kW 5517 kWh 2207 kWh 3310 kWh £594 £331 £925 £10,173 11.0 yrs £8,331
6 kW 6621 kWh 2648 kWh 3973 kWh £713 £397 £1,110 £12,207 11.0 yrs £9,997
7 kW 7724 kWh 3090 kWh 4635 kWh £832 £463 £1,295 £14,242 11.0 yrs £11,663
8 kW 8828 kWh 3531 kWh 5297 kWh £951 £530 £1,480 £16,276 11.0 yrs £13,329

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: £1,112, Upfront: £12,273, 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 2207 kWh 1324 kWh 883 kWh £356 £88 £445 £6,169 13.9 yrs £2,726
3 kW 3310 kWh 1986 kWh 1324 kWh £535 £132 £667 £8,204 12.3 yrs £5,139
4 kW 4414 kWh 2648 kWh 1766 kWh £713 £177 £889 £10,238 11.5 yrs £7,552
5 kW 5517 kWh 3310 kWh 2207 kWh £891 £221 £1,112 £12,273 11.0 yrs £9,965
6 kW 6621 kWh 3973 kWh 2648 kWh £1,069 £265 £1,334 £14,307 10.7 yrs £12,378
7 kW 7724 kWh 4635 kWh 3090 kWh £1,248 £309 £1,557 £16,342 10.5 yrs £14,791
8 kW 8828 kWh 5297 kWh 3531 kWh £1,426 £353 £1,779 £18,376 10.3 yrs £17,204

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: £1,205, Upfront: £13,673, 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 2207 kWh 1545 kWh 662 kWh £416 £66 £482 £7,569 15.7 yrs £2,073
3 kW 3310 kWh 2317 kWh 993 kWh £624 £99 £723 £9,604 13.3 yrs £4,859
4 kW 4414 kWh 3090 kWh 1324 kWh £832 £132 £964 £11,638 12.1 yrs £7,645
5 kW 5517 kWh 3862 kWh 1655 kWh £1,040 £166 £1,205 £13,673 11.3 yrs £10,432
6 kW 6621 kWh 4635 kWh 1986 kWh £1,248 £199 £1,446 £15,707 10.9 yrs £13,218
7 kW 7724 kWh 5407 kWh 2317 kWh £1,456 £232 £1,687 £17,742 10.5 yrs £16,005
8 kW 8828 kWh 6179 kWh 2648 kWh £1,664 £265 £1,928 £19,776 10.3 yrs £18,791

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: £1,233, Upfront: £15,423, 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 2207 kWh 1611 kWh 596 kWh £434 £60 £493 £9,319 18.9 yrs £547
3 kW 3310 kWh 2417 kWh 894 kWh £651 £89 £740 £11,354 15.3 yrs £3,445
4 kW 4414 kWh 3222 kWh 1192 kWh £867 £119 £987 £13,388 13.6 yrs £6,344
5 kW 5517 kWh 4028 kWh 1490 kWh £1,084 £149 £1,233 £15,423 12.5 yrs £9,242
6 kW 6621 kWh 4833 kWh 1788 kWh £1,301 £179 £1,480 £17,457 11.8 yrs £12,140
7 kW 7724 kWh 5639 kWh 2086 kWh £1,518 £209 £1,727 £19,492 11.3 yrs £15,039
8 kW 8828 kWh 6444 kWh 2384 kWh £1,735 £238 £1,973 £21,526 10.9 yrs £17,937

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: £1,252, Upfront: £17,173, Break-even: 13.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2207 kWh 1655 kWh 552 kWh £446 £55 £501 £11,069 22.1 yrs £-1,054
3 kW 3310 kWh 2483 kWh 828 kWh £668 £83 £751 £13,104 17.4 yrs £1,919
4 kW 4414 kWh 3310 kWh 1103 kWh £891 £110 £1,002 £15,138 15.1 yrs £4,892
5 kW 5517 kWh 4138 kWh 1379 kWh £1,114 £138 £1,252 £17,173 13.7 yrs £7,865
6 kW 6621 kWh 4966 kWh 1655 kWh £1,337 £166 £1,502 £19,207 12.8 yrs £10,838
7 kW 7724 kWh 5793 kWh 1931 kWh £1,560 £193 £1,753 £21,242 12.1 yrs £13,812
8 kW 8828 kWh 6621 kWh 2207 kWh £1,782 £221 £2,003 £23,276 11.6 yrs £16,785

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: £1,271, Upfront: £19,623, Break-even: 15.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2207 kWh 1699 kWh 508 kWh £457 £51 £508 £13,519 26.6 yrs £-3,354
3 kW 3310 kWh 2549 kWh 761 kWh £686 £76 £762 £15,554 20.4 yrs £-307
4 kW 4414 kWh 3399 kWh 1015 kWh £915 £102 £1,016 £17,588 17.3 yrs £2,741
5 kW 5517 kWh 4248 kWh 1269 kWh £1,144 £127 £1,271 £19,623 15.4 yrs £5,789
6 kW 6621 kWh 5098 kWh 1523 kWh £1,372 £152 £1,525 £21,657 14.2 yrs £8,837
7 kW 7724 kWh 5948 kWh 1777 kWh £1,601 £178 £1,779 £23,692 13.3 yrs £11,884
8 kW 8828 kWh 6797 kWh 2030 kWh £1,830 £203 £2,033 £25,726 12.7 yrs £14,932

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 TN36

Figures below are tailored to TN36 — click through for full league tables.

Big-Roof Britain Rank #211 of 2182
6.1 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #53 of 2997
9.5 years (UK avg 11.3 years)
~£1,278 /yr • £12,207 upfront
Standing-Charge Drag Rank #65 of 2997
13.6% (UK avg 21.7%) drag on savings
£174 fixed • ~£1,278 /yr value

Your Area at a Glance

Your Electricity Rate
26.92p/kWh
Daily Fixed Charge
47.60p/day
Local Sunshine
1103kWh/kW
A 1 kW system generates ~1103 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: 12% • Bungalows: 34% Based on 811 properties

Coverage

Rother (100%)

Areas Covered

Rye & Winchelsea, Southern Rother, Eastern Rother, Brede & Udimore

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

TN31 (Rother)
≈3.8 km away
Local sunshine: ~1,104 kWh/kWp · +0% vs TN36
TN35 (Hastings)
≈8.8 km away
Local sunshine: ~1,124 kWh/kWp · +2% vs TN36
TN34 (Hastings)
≈11.5 km away
Local sunshine: ~1,125 kWh/kWp · +2% vs TN36
TN37 (Hastings)
≈12.1 km away
Local sunshine: ~1,125 kWh/kWp · +2% vs TN36
TN38 (Hastings)
≈12.7 km away
Local sunshine: ~1,124 kWh/kWp · +2% vs TN36
TN33 (Rother)
≈15.7 km away
Local sunshine: ~1,093 kWh/kWp · -1% vs TN36

Similar sunshine across the UK

BH20 (Dorset)
~1,103 kWh/kWp · -0% vs TN36
CO16 (Tendring)
~1,101 kWh/kWp · -0% vs TN36
PO41 (Isle of Wight)
~1,101 kWh/kWp · -0% vs TN36