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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in TN35 (Hastings)

See if solar pays off for you in Hastings — 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
10.8 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£942
What you save every year
Profit Over 25 Years
£13,377
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 1124 kWh/kW — 95 above the regional median (1029).

Read the full story

A typical roof here lands around 5.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 1124 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)
1124 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: £942, Upfront: £10,173, Break-even: 10.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2247 kWh 899 kWh 1348 kWh £242 £135 £377 £4,069 10.8 yrs £3,467
3 kW 3371 kWh 1348 kWh 2022 kWh £363 £202 £565 £6,104 10.8 yrs £5,200
4 kW 4494 kWh 1798 kWh 2697 kWh £484 £270 £754 £8,138 10.8 yrs £6,934
5 kW 5618 kWh 2247 kWh 3371 kWh £605 £337 £942 £10,173 10.8 yrs £8,667
6 kW 6741 kWh 2697 kWh 4045 kWh £726 £404 £1,130 £12,207 10.8 yrs £10,401
7 kW 7865 kWh 3146 kWh 4719 kWh £847 £472 £1,319 £14,242 10.8 yrs £12,134
8 kW 8989 kWh 3595 kWh 5393 kWh £968 £539 £1,507 £16,276 10.8 yrs £13,868

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: £1,132, Upfront: £12,273, Break-even: 10.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2247 kWh 1348 kWh 899 kWh £363 £90 £453 £6,169 13.6 yrs £2,888
3 kW 3371 kWh 2022 kWh 1348 kWh £544 £135 £679 £8,204 12.1 yrs £5,382
4 kW 4494 kWh 2697 kWh 1798 kWh £726 £180 £906 £10,238 11.3 yrs £7,876
5 kW 5618 kWh 3371 kWh 2247 kWh £907 £225 £1,132 £12,273 10.8 yrs £10,370
6 kW 6741 kWh 4045 kWh 2697 kWh £1,089 £270 £1,359 £14,307 10.5 yrs £12,864
7 kW 7865 kWh 4719 kWh 3146 kWh £1,270 £315 £1,585 £16,342 10.3 yrs £15,357
8 kW 8989 kWh 5393 kWh 3595 kWh £1,452 £360 £1,811 £18,376 10.1 yrs £17,851

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: £1,227, Upfront: £13,673, 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 2247 kWh 1573 kWh 674 kWh £423 £67 £491 £7,569 15.4 yrs £2,248
3 kW 3371 kWh 2359 kWh 1011 kWh £635 £101 £736 £9,604 13.0 yrs £5,122
4 kW 4494 kWh 3146 kWh 1348 kWh £847 £135 £982 £11,638 11.9 yrs £7,997
5 kW 5618 kWh 3932 kWh 1685 kWh £1,059 £169 £1,227 £13,673 11.1 yrs £10,871
6 kW 6741 kWh 4719 kWh 2022 kWh £1,270 £202 £1,473 £15,707 10.7 yrs £13,745
7 kW 7865 kWh 5505 kWh 2359 kWh £1,482 £236 £1,718 £17,742 10.3 yrs £16,619
8 kW 8989 kWh 6292 kWh 2697 kWh £1,694 £270 £1,963 £19,776 10.1 yrs £19,493

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: £1,256, Upfront: £15,423, Break-even: 12.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2247 kWh 1640 kWh 607 kWh £442 £61 £502 £9,319 18.6 yrs £726
3 kW 3371 kWh 2461 kWh 910 kWh £662 £91 £753 £11,354 15.1 yrs £3,715
4 kW 4494 kWh 3281 kWh 1213 kWh £883 £121 £1,005 £13,388 13.3 yrs £6,703
5 kW 5618 kWh 4101 kWh 1517 kWh £1,104 £152 £1,256 £15,423 12.3 yrs £9,691
6 kW 6741 kWh 4921 kWh 1820 kWh £1,325 £182 £1,507 £17,457 11.6 yrs £12,679
7 kW 7865 kWh 5741 kWh 2124 kWh £1,546 £212 £1,758 £19,492 11.1 yrs £15,667
8 kW 8989 kWh 6562 kWh 2427 kWh £1,766 £243 £2,009 £21,526 10.7 yrs £18,656

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: £1,275, Upfront: £17,173, Break-even: 13.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2247 kWh 1685 kWh 562 kWh £454 £56 £510 £11,069 21.7 yrs £-871
3 kW 3371 kWh 2528 kWh 843 kWh £681 £84 £765 £13,104 17.1 yrs £2,193
4 kW 4494 kWh 3371 kWh 1124 kWh £907 £112 £1,020 £15,138 14.8 yrs £5,257
5 kW 5618 kWh 4213 kWh 1404 kWh £1,134 £140 £1,275 £17,173 13.5 yrs £8,321
6 kW 6741 kWh 5056 kWh 1685 kWh £1,361 £169 £1,530 £19,207 12.6 yrs £11,386
7 kW 7865 kWh 5899 kWh 1966 kWh £1,588 £197 £1,785 £21,242 11.9 yrs £14,450
8 kW 8989 kWh 6741 kWh 2247 kWh £1,815 £225 £2,040 £23,276 11.4 yrs £17,514

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: £1,294, Upfront: £19,623, 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 2247 kWh 1730 kWh 517 kWh £466 £52 £517 £13,519 26.1 yrs £-3,169
3 kW 3371 kWh 2595 kWh 775 kWh £699 £78 £776 £15,554 20.0 yrs £-29
4 kW 4494 kWh 3461 kWh 1034 kWh £932 £103 £1,035 £17,588 17.0 yrs £3,111
5 kW 5618 kWh 4326 kWh 1292 kWh £1,164 £129 £1,294 £19,623 15.2 yrs £6,251
6 kW 6741 kWh 5191 kWh 1551 kWh £1,397 £155 £1,552 £21,657 14.0 yrs £9,392
7 kW 7865 kWh 6056 kWh 1809 kWh £1,630 £181 £1,811 £23,692 13.1 yrs £12,532
8 kW 8989 kWh 6921 kWh 2067 kWh £1,863 £207 £2,070 £25,726 12.4 yrs £15,672

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 TN35

Figures below are tailored to TN35 — click through for full league tables.

Big-Roof Britain Rank #829 of 2182
5.2 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #30 of 2997
9.4 years (UK avg 11.3 years)
~£1,085 /yr • £10,173 upfront
Standing-Charge Drag Rank #567 of 2997
16.0% (UK avg 21.7%) drag on savings
£174 fixed • ~£1,085 /yr value

Your Area at a Glance

Your Electricity Rate
26.92p/kWh
Daily Fixed Charge
47.60p/day
Local Sunshine
1124kWh/kW
A 1 kW system generates ~1124 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
5.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 68% • Flats: 16% • Bungalows: 14% Based on 5,175 properties

Coverage

Hastings (59%)|Rother (41%)

Areas Covered

Ore, Southern Rother, Sedlescombe & Westfield, Old Hastings, Castle, Tressell, Baird, St Helens

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

TN34 (Hastings)
≈2.8 km away
Local sunshine: ~1,125 kWh/kWp · +0% vs TN35
TN37 (Hastings)
≈3.5 km away
Local sunshine: ~1,125 kWh/kWp · +0% vs TN35
TN38 (Hastings)
≈4.2 km away
Local sunshine: ~1,124 kWh/kWp · +0% vs TN35
TN36 (Rother)
≈8.8 km away
Local sunshine: ~1,103 kWh/kWp · -2% vs TN35
TN33 (Rother)
≈9.7 km away
Local sunshine: ~1,093 kWh/kWp · -3% vs TN35
TN40 (Rother)
≈9.8 km away
Local sunshine: ~1,115 kWh/kWp · -1% vs TN35

Similar sunshine across the UK

TQ7 (South Hams)
~1,123 kWh/kWp · -0% vs TN35
PO20 (Chichester)
~1,122 kWh/kWp · -0% vs TN35
PO38 (Isle of Wight)
~1,125 kWh/kWp · +0% vs TN35