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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in EX22 (Torridge)

See if solar pays off for you in Torridge — 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
12.5 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£979
What you save every year
Profit Over 25 Years
£12,277
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 Southern Western, the current unit rate is 26.82p/kWh with a 54.03p/day standing charge. Your postcode’s south-facing sunshine yield is 976 kWh/kW — 38 below the regional median (1013).

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 976 kWh per year on a south-facing roof. We value self-used electricity at 26.8p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.8p/kWh
Standing charge
54.0p/day
Sunshine yield (south)
976 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: £816, Upfront: £10,173, 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 1952 kWh 781 kWh 1171 kWh £209 £117 £326 £4,069 12.5 yrs £2,460
3 kW 2927 kWh 1171 kWh 1756 kWh £314 £176 £490 £6,104 12.5 yrs £3,690
4 kW 3903 kWh 1561 kWh 2342 kWh £419 £234 £653 £8,138 12.5 yrs £4,920
5 kW 4879 kWh 1952 kWh 2927 kWh £523 £293 £816 £10,173 12.5 yrs £6,150
6 kW 5855 kWh 2342 kWh 3513 kWh £628 £351 £979 £12,207 12.5 yrs £7,381
7 kW 6831 kWh 2732 kWh 4098 kWh £733 £410 £1,143 £14,242 12.5 yrs £8,611
8 kW 7806 kWh 3123 kWh 4684 kWh £837 £468 £1,306 £16,276 12.5 yrs £9,841

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: £980, Upfront: £12,273, 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 1952 kWh 1171 kWh 781 kWh £314 £78 £392 £6,169 15.7 yrs £1,673
3 kW 2927 kWh 1756 kWh 1171 kWh £471 £117 £588 £8,204 13.9 yrs £3,560
4 kW 3903 kWh 2342 kWh 1561 kWh £628 £156 £784 £10,238 13.1 yrs £5,446
5 kW 4879 kWh 2927 kWh 1952 kWh £785 £195 £980 £12,273 12.5 yrs £7,333
6 kW 5855 kWh 3513 kWh 2342 kWh £942 £234 £1,176 £14,307 12.2 yrs £9,220
7 kW 6831 kWh 4098 kWh 2732 kWh £1,099 £273 £1,372 £16,342 11.9 yrs £11,106
8 kW 7806 kWh 4684 kWh 3123 kWh £1,256 £312 £1,568 £18,376 11.7 yrs £12,993

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: £1,062, Upfront: £13,673, 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 1952 kWh 1366 kWh 585 kWh £366 £59 £425 £7,569 17.8 yrs £930
3 kW 2927 kWh 2049 kWh 878 kWh £550 £88 £637 £9,604 15.1 yrs £3,145
4 kW 3903 kWh 2732 kWh 1171 kWh £733 £117 £850 £11,638 13.7 yrs £5,359
5 kW 4879 kWh 3415 kWh 1464 kWh £916 £146 £1,062 £13,673 12.9 yrs £7,574
6 kW 5855 kWh 4098 kWh 1756 kWh £1,099 £176 £1,275 £15,707 12.3 yrs £9,789
7 kW 6831 kWh 4781 kWh 2049 kWh £1,282 £205 £1,487 £17,742 11.9 yrs £12,004
8 kW 7806 kWh 5464 kWh 2342 kWh £1,466 £234 £1,700 £19,776 11.6 yrs £14,219

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: £1,087, Upfront: £15,423, 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 1952 kWh 1425 kWh 527 kWh £382 £53 £435 £9,319 21.4 yrs £-623
3 kW 2927 kWh 2137 kWh 790 kWh £573 £79 £652 £11,354 17.4 yrs £1,690
4 kW 3903 kWh 2849 kWh 1054 kWh £764 £105 £870 £13,388 15.4 yrs £4,003
5 kW 4879 kWh 3562 kWh 1317 kWh £955 £132 £1,087 £15,423 14.2 yrs £6,317
6 kW 5855 kWh 4274 kWh 1581 kWh £1,146 £158 £1,304 £17,457 13.4 yrs £8,630
7 kW 6831 kWh 4986 kWh 1844 kWh £1,337 £184 £1,522 £19,492 12.8 yrs £10,943
8 kW 7806 kWh 5699 kWh 2108 kWh £1,528 £211 £1,739 £21,526 12.4 yrs £13,257

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: £1,103, Upfront: £17,173, 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 1952 kWh 1464 kWh 488 kWh £393 £49 £441 £11,069 25.1 yrs £-2,242
3 kW 2927 kWh 2196 kWh 732 kWh £589 £73 £662 £13,104 19.8 yrs £137
4 kW 3903 kWh 2927 kWh 976 kWh £785 £98 £883 £15,138 17.1 yrs £2,516
5 kW 4879 kWh 3659 kWh 1220 kWh £981 £122 £1,103 £17,173 15.6 yrs £4,895
6 kW 5855 kWh 4391 kWh 1464 kWh £1,178 £146 £1,324 £19,207 14.5 yrs £7,274
7 kW 6831 kWh 5123 kWh 1708 kWh £1,374 £171 £1,545 £21,242 13.8 yrs £9,653
8 kW 7806 kWh 5855 kWh 1952 kWh £1,570 £195 £1,765 £23,276 13.2 yrs £12,032

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: £1,120, Upfront: £19,623, Break-even: 17.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1952 kWh 1503 kWh 449 kWh £403 £45 £448 £13,519 30.2 yrs £-4,561
3 kW 2927 kWh 2254 kWh 673 kWh £605 £67 £672 £15,554 23.1 yrs £-2,116
4 kW 3903 kWh 3005 kWh 898 kWh £806 £90 £896 £17,588 19.6 yrs £329
5 kW 4879 kWh 3757 kWh 1122 kWh £1,008 £112 £1,120 £19,623 17.5 yrs £2,773
6 kW 5855 kWh 4508 kWh 1347 kWh £1,209 £135 £1,344 £21,657 16.1 yrs £5,218
7 kW 6831 kWh 5260 kWh 1571 kWh £1,411 £157 £1,568 £23,692 15.1 yrs £7,662
8 kW 7806 kWh 6011 kWh 1795 kWh £1,612 £180 £1,792 £25,726 14.4 yrs £10,107

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 EX22

Figures below are tailored to EX22 — click through for full league tables.

Big-Roof Britain Rank #227 of 2182
6.1 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #945 of 2997
10.8 years (UK avg 11.3 years)
~£1,127 /yr • £12,207 upfront
Standing-Charge Drag Rank #868 of 2997
17.5% (UK avg 21.7%) drag on savings
£197 fixed • ~£1,127 /yr value

Your Area at a Glance

Your Electricity Rate
26.82p/kWh
Daily Fixed Charge
54.03p/day
Local Sunshine
976kWh/kW
A 1 kW system generates ~976 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: 68% • Flats: 7% • Bungalows: 24% Based on 3,610 properties

Coverage

Torridge (89%)|Cornwall (11%)

Areas Covered

Milton & Tamarside, Holsworthy, Hartland, Poundstock, Broadheath, Monkleigh & Putford, Shebbear & Langtree, Stratton + 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 Southern Western

EX21 (Torridge)
≈10.5 km away
Local sunshine: ~962 kWh/kWp · -1% vs EX22
EX23 (Cornwall)
≈12.9 km away
Local sunshine: ~1,008 kWh/kWp · +3% vs EX22
PL16 (West Devon)
≈19.5 km away
Local sunshine: ~962 kWh/kWp · -1% vs EX22
PL15 (Cornwall)
≈20.0 km away
Local sunshine: ~987 kWh/kWp · +1% vs EX22
EX38 (Torridge)
≈21.6 km away
Local sunshine: ~975 kWh/kWp · -0% vs EX22
EX19 (Torridge)
≈24.7 km away
Local sunshine: ~958 kWh/kWp · -2% vs EX22

Similar sunshine across the UK

LA15 (Westmorland and Furness)
~976 kWh/kWp · -0% vs EX22
DN31 (North East Lincolnshire)
~976 kWh/kWp · -0% vs EX22
BT30 (Newry, Mourne and Down)
~976 kWh/kWp · -0% vs EX22