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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in TN37 (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
£6,104
What you pay to get started
Annual Benefit
£566
What you save every year
Profit Over 25 Years
£8,044
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 1125 kWh/kW — 96 above the regional median (1029).

Read the full story

A typical roof here lands around 3.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 1125 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)
1125 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: £943, 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 2250 kWh 900 kWh 1350 kWh £242 £135 £377 £4,069 10.8 yrs £3,476
3 kW 3375 kWh 1350 kWh 2025 kWh £363 £202 £566 £6,104 10.8 yrs £5,214
4 kW 4500 kWh 1800 kWh 2700 kWh £485 £270 £755 £8,138 10.8 yrs £6,952
5 kW 5625 kWh 2250 kWh 3375 kWh £606 £337 £943 £10,173 10.8 yrs £8,691
6 kW 6750 kWh 2700 kWh 4050 kWh £727 £405 £1,132 £12,207 10.8 yrs £10,429
7 kW 7875 kWh 3150 kWh 4725 kWh £848 £472 £1,320 £14,242 10.8 yrs £12,167
8 kW 9000 kWh 3600 kWh 5400 kWh £969 £540 £1,509 £16,276 10.8 yrs £13,905

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: £1,133, 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 2250 kWh 1350 kWh 900 kWh £363 £90 £453 £6,169 13.6 yrs £2,899
3 kW 3375 kWh 2025 kWh 1350 kWh £545 £135 £680 £8,204 12.1 yrs £5,398
4 kW 4500 kWh 2700 kWh 1800 kWh £727 £180 £907 £10,238 11.3 yrs £7,898
5 kW 5625 kWh 3375 kWh 2250 kWh £909 £225 £1,133 £12,273 10.8 yrs £10,397
6 kW 6750 kWh 4050 kWh 2700 kWh £1,090 £270 £1,360 £14,307 10.5 yrs £12,897
7 kW 7875 kWh 4725 kWh 3150 kWh £1,272 £315 £1,587 £16,342 10.3 yrs £15,396
8 kW 9000 kWh 5400 kWh 3600 kWh £1,454 £360 £1,814 £18,376 10.1 yrs £17,896

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: £1,229, 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 2250 kWh 1575 kWh 675 kWh £424 £67 £491 £7,569 15.4 yrs £2,260
3 kW 3375 kWh 2362 kWh 1012 kWh £636 £101 £737 £9,604 13.0 yrs £5,141
4 kW 4500 kWh 3150 kWh 1350 kWh £848 £135 £983 £11,638 11.8 yrs £8,021
5 kW 5625 kWh 3937 kWh 1687 kWh £1,060 £169 £1,229 £13,673 11.1 yrs £10,901
6 kW 6750 kWh 4725 kWh 2025 kWh £1,272 £202 £1,474 £15,707 10.7 yrs £13,781
7 kW 7875 kWh 5512 kWh 2362 kWh £1,484 £236 £1,720 £17,742 10.3 yrs £16,661
8 kW 9000 kWh 6300 kWh 2700 kWh £1,696 £270 £1,966 £19,776 10.1 yrs £19,541

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: £1,257, 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 2250 kWh 1642 kWh 607 kWh £442 £61 £503 £9,319 18.5 yrs £739
3 kW 3375 kWh 2464 kWh 911 kWh £663 £91 £754 £11,354 15.1 yrs £3,733
4 kW 4500 kWh 3285 kWh 1215 kWh £884 £121 £1,006 £13,388 13.3 yrs £6,728
5 kW 5625 kWh 4106 kWh 1519 kWh £1,105 £152 £1,257 £15,423 12.3 yrs £9,722
6 kW 6750 kWh 4927 kWh 1822 kWh £1,326 £182 £1,509 £17,457 11.6 yrs £12,716
7 kW 7875 kWh 5748 kWh 2126 kWh £1,547 £213 £1,760 £19,492 11.1 yrs £15,711
8 kW 9000 kWh 6570 kWh 2430 kWh £1,769 £243 £2,012 £21,526 10.7 yrs £18,705

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: £1,276, 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 2250 kWh 1687 kWh 562 kWh £454 £56 £511 £11,069 21.7 yrs £-859
3 kW 3375 kWh 2531 kWh 844 kWh £681 £84 £766 £13,104 17.1 yrs £2,212
4 kW 4500 kWh 3375 kWh 1125 kWh £909 £112 £1,021 £15,138 14.8 yrs £5,282
5 kW 5625 kWh 4219 kWh 1406 kWh £1,136 £141 £1,276 £17,173 13.5 yrs £8,353
6 kW 6750 kWh 5062 kWh 1687 kWh £1,363 £169 £1,532 £19,207 12.5 yrs £11,423
7 kW 7875 kWh 5906 kWh 1969 kWh £1,590 £197 £1,787 £21,242 11.9 yrs £14,494
8 kW 9000 kWh 6750 kWh 2250 kWh £1,817 £225 £2,042 £23,276 11.4 yrs £17,564

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: £1,295, Upfront: £19,623, Break-even: 15.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2250 kWh 1732 kWh 517 kWh £466 £52 £518 £13,519 26.1 yrs £-3,157
3 kW 3375 kWh 2599 kWh 776 kWh £700 £78 £777 £15,554 20.0 yrs £-10
4 kW 4500 kWh 3465 kWh 1035 kWh £933 £103 £1,036 £17,588 17.0 yrs £3,137
5 kW 5625 kWh 4331 kWh 1294 kWh £1,166 £129 £1,295 £19,623 15.1 yrs £6,283
6 kW 6750 kWh 5197 kWh 1552 kWh £1,399 £155 £1,554 £21,657 13.9 yrs £9,430
7 kW 7875 kWh 6063 kWh 1811 kWh £1,632 £181 £1,813 £23,692 13.1 yrs £12,577
8 kW 9000 kWh 6930 kWh 2070 kWh £1,865 £207 £2,072 £25,726 12.4 yrs £15,723

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 TN37

Figures below are tailored to TN37 — click through for full league tables.

Big-Roof Britain Rank #2022 of 2182
4.1 kWp (UK avg 5.1 kWp)
~9 panels (≈430 W)
Solar Payback Index Rank #31 of 2997
9.4 years (UK avg 11.3 years)
~£1,086 /yr • £10,173 upfront
Standing-Charge Drag Rank #560 of 2997
16.0% (UK avg 21.7%) drag on savings
£174 fixed • ~£1,086 /yr value

Your Area at a Glance

Your Electricity Rate
26.92p/kWh
Daily Fixed Charge
47.60p/day
Local Sunshine
1125kWh/kW
A 1 kW system generates ~1125 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
3.0kW
For houses & bungalows in this area

⚠️ This area is predominantly flats. Many residents require freeholder approval for solar installations. System size shown reflects houses and bungalows only.

Local Property Data

Property Types

Houses: 38% • Flats: 53% • Bungalows: 4% Based on 8,011 properties

Coverage

Hastings (98%)|Rother (2%)

Areas Covered

Ashdown, Gensing, Silverhill, Central St Leonards, Wishing Tree, Conquest, Sedlescombe & Westfield, Hollington + 1 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

TN38 (Hastings)
≈0.7 km away
Local sunshine: ~1,124 kWh/kWp · -0% vs TN37
TN34 (Hastings)
≈1.8 km away
Local sunshine: ~1,125 kWh/kWp · +0% vs TN37
TN35 (Hastings)
≈3.5 km away
Local sunshine: ~1,124 kWh/kWp · -0% vs TN37
TN40 (Rother)
≈6.4 km away
Local sunshine: ~1,115 kWh/kWp · -1% vs TN37
TN33 (Rother)
≈7.4 km away
Local sunshine: ~1,093 kWh/kWp · -3% vs TN37
TN39 (Rother)
≈7.6 km away
Local sunshine: ~1,116 kWh/kWp · -1% vs TN37

Similar sunshine across the UK

PO38 (Isle of Wight)
~1,125 kWh/kWp · +0% vs TN37
TQ7 (South Hams)
~1,123 kWh/kWp · -0% vs TN37
PO20 (Chichester)
~1,122 kWh/kWp · -0% vs TN37