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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in TN33 (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
11.1 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£1,100
What you save every year
Profit Over 25 Years
£15,282
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 1093 kWh/kW — 64 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 1093 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)
1093 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: £916, Upfront: £10,173, Break-even: 11.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2186 kWh 874 kWh 1312 kWh £235 £131 £367 £4,069 11.1 yrs £3,261
3 kW 3279 kWh 1312 kWh 1967 kWh £353 £197 £550 £6,104 11.1 yrs £4,892
4 kW 4372 kWh 1749 kWh 2623 kWh £471 £262 £733 £8,138 11.1 yrs £6,523
5 kW 5465 kWh 2186 kWh 3279 kWh £588 £328 £916 £10,173 11.1 yrs £8,154
6 kW 6558 kWh 2623 kWh 3935 kWh £706 £393 £1,100 £12,207 11.1 yrs £9,784
7 kW 7651 kWh 3060 kWh 4590 kWh £824 £459 £1,283 £14,242 11.1 yrs £11,415
8 kW 8743 kWh 3497 kWh 5246 kWh £941 £525 £1,466 £16,276 11.1 yrs £13,046

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: £1,101, Upfront: £12,273, Break-even: 11.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2186 kWh 1312 kWh 874 kWh £353 £87 £440 £6,169 14.0 yrs £2,641
3 kW 3279 kWh 1967 kWh 1312 kWh £530 £131 £661 £8,204 12.4 yrs £5,011
4 kW 4372 kWh 2623 kWh 1749 kWh £706 £175 £881 £10,238 11.6 yrs £7,382
5 kW 5465 kWh 3279 kWh 2186 kWh £883 £219 £1,101 £12,273 11.1 yrs £9,752
6 kW 6558 kWh 3935 kWh 2623 kWh £1,059 £262 £1,321 £14,307 10.8 yrs £12,123
7 kW 7651 kWh 4590 kWh 3060 kWh £1,236 £306 £1,542 £16,342 10.6 yrs £14,493
8 kW 8743 kWh 5246 kWh 3497 kWh £1,412 £350 £1,762 £18,376 10.4 yrs £16,863

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: £1,194, Upfront: £13,673, Break-even: 11.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2186 kWh 1530 kWh 656 kWh £412 £66 £477 £7,569 15.9 yrs £1,981
3 kW 3279 kWh 2295 kWh 984 kWh £618 £98 £716 £9,604 13.4 yrs £4,721
4 kW 4372 kWh 3060 kWh 1312 kWh £824 £131 £955 £11,638 12.2 yrs £7,461
5 kW 5465 kWh 3825 kWh 1639 kWh £1,030 £164 £1,194 £13,673 11.5 yrs £10,201
6 kW 6558 kWh 4590 kWh 1967 kWh £1,236 £197 £1,432 £15,707 11.0 yrs £12,942
7 kW 7651 kWh 5355 kWh 2295 kWh £1,442 £230 £1,671 £17,742 10.6 yrs £15,682
8 kW 8743 kWh 6120 kWh 2623 kWh £1,648 £262 £1,910 £19,776 10.4 yrs £18,422

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: £1,221, Upfront: £15,423, Break-even: 12.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2186 kWh 1596 kWh 590 kWh £430 £59 £489 £9,319 19.1 yrs £452
3 kW 3279 kWh 2394 kWh 885 kWh £644 £89 £733 £11,354 15.5 yrs £3,304
4 kW 4372 kWh 3191 kWh 1180 kWh £859 £118 £977 £13,388 13.7 yrs £6,155
5 kW 5465 kWh 3989 kWh 1475 kWh £1,074 £148 £1,221 £15,423 12.6 yrs £9,006
6 kW 6558 kWh 4787 kWh 1771 kWh £1,289 £177 £1,466 £17,457 11.9 yrs £11,857
7 kW 7651 kWh 5585 kWh 2066 kWh £1,503 £207 £1,710 £19,492 11.4 yrs £14,709
8 kW 8743 kWh 6383 kWh 2361 kWh £1,718 £236 £1,954 £21,526 11.0 yrs £17,560

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: £1,240, Upfront: £17,173, 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 2186 kWh 1639 kWh 546 kWh £441 £55 £496 £11,069 22.3 yrs £-1,150
3 kW 3279 kWh 2459 kWh 820 kWh £662 £82 £744 £13,104 17.6 yrs £1,776
4 kW 4372 kWh 3279 kWh 1093 kWh £883 £109 £992 £15,138 15.3 yrs £4,701
5 kW 5465 kWh 4098 kWh 1366 kWh £1,103 £137 £1,240 £17,173 13.8 yrs £7,626
6 kW 6558 kWh 4918 kWh 1639 kWh £1,324 £164 £1,488 £19,207 12.9 yrs £10,551
7 kW 7651 kWh 5738 kWh 1913 kWh £1,545 £191 £1,736 £21,242 12.2 yrs £13,476
8 kW 8743 kWh 6558 kWh 2186 kWh £1,765 £219 £1,984 £23,276 11.7 yrs £16,402

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: £1,258, Upfront: £19,623, 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 2186 kWh 1683 kWh 503 kWh £453 £50 £503 £13,519 26.9 yrs £-3,452
3 kW 3279 kWh 2525 kWh 754 kWh £680 £75 £755 £15,554 20.6 yrs £-452
4 kW 4372 kWh 3366 kWh 1005 kWh £906 £101 £1,007 £17,588 17.5 yrs £2,547
5 kW 5465 kWh 4208 kWh 1257 kWh £1,133 £126 £1,258 £19,623 15.6 yrs £5,546
6 kW 6558 kWh 5049 kWh 1508 kWh £1,359 £151 £1,510 £21,657 14.3 yrs £8,545
7 kW 7651 kWh 5891 kWh 1760 kWh £1,586 £176 £1,762 £23,692 13.4 yrs £11,544
8 kW 8743 kWh 6732 kWh 2011 kWh £1,812 £201 £2,013 £25,726 12.8 yrs £14,543

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 TN33

Figures below are tailored to TN33 — click through for full league tables.

Big-Roof Britain Rank #418 of 2182
5.7 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #73 of 2997
9.6 years (UK avg 11.3 years)
~£1,266 /yr • £12,207 upfront
Standing-Charge Drag Rank #69 of 2997
13.7% (UK avg 21.7%) drag on savings
£174 fixed • ~£1,266 /yr value

Your Area at a Glance

Your Electricity Rate
26.92p/kWh
Daily Fixed Charge
47.60p/day
Local Sunshine
1093kWh/kW
A 1 kW system generates ~1093 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: 66% • Flats: 15% • Bungalows: 18% Based on 3,544 properties

Coverage

Rother (88%)|Wealden (12%)

Areas Covered

North Battle, Netherfield & Whatlington, Catsfield & Crowhurst, South Battle & Telham, Herstmonceux & Pevensey Levels, Sedlescombe & Westfield

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

TN38 (Hastings)
≈6.9 km away
Local sunshine: ~1,124 kWh/kWp · +3% vs TN33
TN37 (Hastings)
≈7.4 km away
Local sunshine: ~1,125 kWh/kWp · +3% vs TN33
TN32 (Rother)
≈7.7 km away
Local sunshine: ~1,073 kWh/kWp · -2% vs TN33
TN39 (Rother)
≈8.2 km away
Local sunshine: ~1,116 kWh/kWp · +2% vs TN33
TN40 (Rother)
≈8.3 km away
Local sunshine: ~1,115 kWh/kWp · +2% vs TN33
TN34 (Hastings)
≈9.1 km away
Local sunshine: ~1,125 kWh/kWp · +3% vs TN33

Similar sunshine across the UK

CO13 (Tendring)
~1,094 kWh/kWp · +0% vs TN33
BH8 (Bournemouth, Christchurch and Poole)
~1,092 kWh/kWp · -0% vs TN33
TR25 (Isles of Scilly)
~1,092 kWh/kWp · -0% vs TN33