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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in CT6 (Canterbury)

See if solar pays off for you in Canterbury — 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
11.3 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£1,076
What you save every year
Profit Over 25 Years
£14,682
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 1069 kWh/kW — 40 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 1069 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)
1069 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: £896, Upfront: £10,173, 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 2138 kWh 855 kWh 1283 kWh £230 £128 £359 £4,069 11.3 yrs £3,102
3 kW 3207 kWh 1283 kWh 1924 kWh £345 £192 £538 £6,104 11.3 yrs £4,652
4 kW 4276 kWh 1711 kWh 2566 kWh £460 £257 £717 £8,138 11.3 yrs £6,203
5 kW 5345 kWh 2138 kWh 3207 kWh £576 £321 £896 £10,173 11.3 yrs £7,754
6 kW 6414 kWh 2566 kWh 3849 kWh £691 £385 £1,076 £12,207 11.3 yrs £9,305
7 kW 7484 kWh 2993 kWh 4490 kWh £806 £449 £1,255 £14,242 11.3 yrs £10,855
8 kW 8553 kWh 3421 kWh 5132 kWh £921 £513 £1,434 £16,276 11.3 yrs £12,406

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: £1,077, Upfront: £12,273, Break-even: 11.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2138 kWh 1283 kWh 855 kWh £345 £86 £431 £6,169 14.3 yrs £2,449
3 kW 3207 kWh 1924 kWh 1283 kWh £518 £128 £646 £8,204 12.7 yrs £4,723
4 kW 4276 kWh 2566 kWh 1711 kWh £691 £171 £862 £10,238 11.9 yrs £6,997
5 kW 5345 kWh 3207 kWh 2138 kWh £863 £214 £1,077 £12,273 11.4 yrs £9,272
6 kW 6414 kWh 3849 kWh 2566 kWh £1,036 £257 £1,293 £14,307 11.1 yrs £11,546
7 kW 7484 kWh 4490 kWh 2993 kWh £1,209 £299 £1,508 £16,342 10.8 yrs £13,820
8 kW 8553 kWh 5132 kWh 3421 kWh £1,381 £342 £1,724 £18,376 10.7 yrs £16,094

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: £1,168, Upfront: £13,673, Break-even: 11.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2138 kWh 1497 kWh 641 kWh £403 £64 £467 £7,569 16.2 yrs £1,772
3 kW 3207 kWh 2245 kWh 962 kWh £604 £96 £701 £9,604 13.7 yrs £4,408
4 kW 4276 kWh 2993 kWh 1283 kWh £806 £128 £934 £11,638 12.5 yrs £7,044
5 kW 5345 kWh 3742 kWh 1604 kWh £1,007 £160 £1,168 £13,673 11.7 yrs £9,680
6 kW 6414 kWh 4490 kWh 1924 kWh £1,209 £192 £1,401 £15,707 11.2 yrs £12,317
7 kW 7484 kWh 5238 kWh 2245 kWh £1,410 £225 £1,635 £17,742 10.9 yrs £14,953
8 kW 8553 kWh 5987 kWh 2566 kWh £1,612 £257 £1,868 £19,776 10.6 yrs £17,589

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: £1,195, Upfront: £15,423, Break-even: 12.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2138 kWh 1561 kWh 577 kWh £420 £58 £478 £9,319 19.5 yrs £239
3 kW 3207 kWh 2341 kWh 866 kWh £630 £87 £717 £11,354 15.8 yrs £2,984
4 kW 4276 kWh 3122 kWh 1155 kWh £840 £115 £956 £13,388 14.0 yrs £5,728
5 kW 5345 kWh 3902 kWh 1443 kWh £1,050 £144 £1,195 £15,423 12.9 yrs £8,473
6 kW 6414 kWh 4683 kWh 1732 kWh £1,261 £173 £1,434 £17,457 12.2 yrs £11,218
7 kW 7484 kWh 5463 kWh 2021 kWh £1,471 £202 £1,673 £19,492 11.7 yrs £13,962
8 kW 8553 kWh 6243 kWh 2309 kWh £1,681 £231 £1,912 £21,526 11.3 yrs £16,707

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: £1,213, Upfront: £17,173, Break-even: 14.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2138 kWh 1604 kWh 535 kWh £432 £53 £485 £11,069 22.8 yrs £-1,366
3 kW 3207 kWh 2405 kWh 802 kWh £648 £80 £728 £13,104 18.0 yrs £1,451
4 kW 4276 kWh 3207 kWh 1069 kWh £863 £107 £970 £15,138 15.6 yrs £4,268
5 kW 5345 kWh 4009 kWh 1336 kWh £1,079 £134 £1,213 £17,173 14.2 yrs £7,085
6 kW 6414 kWh 4811 kWh 1604 kWh £1,295 £160 £1,455 £19,207 13.2 yrs £9,902
7 kW 7484 kWh 5613 kWh 1871 kWh £1,511 £187 £1,698 £21,242 12.5 yrs £12,719
8 kW 8553 kWh 6414 kWh 2138 kWh £1,727 £214 £1,941 £23,276 12.0 yrs £15,536

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: £1,231, Upfront: £19,623, Break-even: 15.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2138 kWh 1646 kWh 492 kWh £443 £49 £492 £13,519 27.5 yrs £-3,671
3 kW 3207 kWh 2470 kWh 738 kWh £665 £74 £739 £15,554 21.1 yrs £-782
4 kW 4276 kWh 3293 kWh 984 kWh £886 £98 £985 £17,588 17.9 yrs £2,107
5 kW 5345 kWh 4116 kWh 1229 kWh £1,108 £123 £1,231 £19,623 15.9 yrs £4,997
6 kW 6414 kWh 4939 kWh 1475 kWh £1,330 £148 £1,477 £21,657 14.7 yrs £7,886
7 kW 7484 kWh 5762 kWh 1721 kWh £1,551 £172 £1,723 £23,692 13.7 yrs £10,775
8 kW 8553 kWh 6586 kWh 1967 kWh £1,773 £197 £1,970 £25,726 13.1 yrs £13,665

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 CT6

Figures below are tailored to CT6 — click through for full league tables.

Big-Roof Britain Rank #791 of 2182
5.3 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #156 of 2997
9.9 years (UK avg 11.3 years)
~£1,238 /yr • £12,207 upfront
Standing-Charge Drag Rank #90 of 2997
14.0% (UK avg 21.7%) drag on savings
£174 fixed • ~£1,238 /yr value

Your Area at a Glance

Your Electricity Rate
26.92p/kWh
Daily Fixed Charge
47.60p/day
Local Sunshine
1069kWh/kW
A 1 kW system generates ~1069 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: 48% • Flats: 28% • Bungalows: 21% Based on 11,161 properties

Coverage

Canterbury (100%)

Areas Covered

Heron, Herne & Broomfield, Beltinge, Greenhill, West Bay, Reculver, Sturry, Chestfield + 2 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

CT5 (Canterbury)
≈6.8 km away
Local sunshine: ~1,047 kWh/kWp · -2% vs CT6
CT2 (Canterbury)
≈8.9 km away
Local sunshine: ~1,087 kWh/kWp · +2% vs CT6
CT1 (Canterbury)
≈9.9 km away
Local sunshine: ~1,063 kWh/kWp · -1% vs CT6
CT3 (Dover)
≈10.9 km away
Local sunshine: ~1,106 kWh/kWp · +3% vs CT6
CT7 (Thanet)
≈12.2 km away
Local sunshine: ~1,091 kWh/kWp · +2% vs CT6
CT4 (Canterbury)
≈14.1 km away
Local sunshine: ~1,087 kWh/kWp · +2% vs CT6

Similar sunshine across the UK

CO11 (Tendring)
~1,070 kWh/kWp · +0% vs CT6
SS4 (Rochford)
~1,068 kWh/kWp · -0% vs CT6
SS22 (Southend-on-Sea)
~1,068 kWh/kWp · -0% vs CT6