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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in EX32 (North Devon)

See if solar pays off for you in North Devon — 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
£10,173
What you pay to get started
Annual Benefit
£812
What you save every year
Profit Over 25 Years
£10,134
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 971 kWh/kW — 42 below the regional median (1013).

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 971 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)
971 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: £812, 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 1942 kWh 777 kWh 1165 kWh £208 £117 £325 £4,069 12.5 yrs £2,429
3 kW 2913 kWh 1165 kWh 1748 kWh £313 £175 £487 £6,104 12.5 yrs £3,644
4 kW 3885 kWh 1554 kWh 2331 kWh £417 £233 £650 £8,138 12.5 yrs £4,858
5 kW 4856 kWh 1942 kWh 2913 kWh £521 £291 £812 £10,173 12.5 yrs £6,073
6 kW 5827 kWh 2331 kWh 3496 kWh £625 £350 £975 £12,207 12.5 yrs £7,288
7 kW 6798 kWh 2719 kWh 4079 kWh £729 £408 £1,137 £14,242 12.5 yrs £8,502
8 kW 7769 kWh 3108 kWh 4662 kWh £833 £466 £1,300 £16,276 12.5 yrs £9,717

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: £976, Upfront: £12,273, 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 1942 kWh 1165 kWh 777 kWh £313 £78 £390 £6,169 15.8 yrs £1,636
3 kW 2913 kWh 1748 kWh 1165 kWh £469 £117 £585 £8,204 14.0 yrs £3,504
4 kW 3885 kWh 2331 kWh 1554 kWh £625 £155 £781 £10,238 13.1 yrs £5,372
5 kW 4856 kWh 2913 kWh 1942 kWh £781 £194 £976 £12,273 12.6 yrs £7,240
6 kW 5827 kWh 3496 kWh 2331 kWh £938 £233 £1,171 £14,307 12.2 yrs £9,108
7 kW 6798 kWh 4079 kWh 2719 kWh £1,094 £272 £1,366 £16,342 12.0 yrs £10,976
8 kW 7769 kWh 4662 kWh 3108 kWh £1,250 £311 £1,561 £18,376 11.8 yrs £12,844

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: £1,057, 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 1942 kWh 1360 kWh 583 kWh £365 £58 £423 £7,569 17.9 yrs £889
3 kW 2913 kWh 2039 kWh 874 kWh £547 £87 £634 £9,604 15.1 yrs £3,084
4 kW 3885 kWh 2719 kWh 1165 kWh £729 £117 £846 £11,638 13.8 yrs £5,279
5 kW 4856 kWh 3399 kWh 1457 kWh £912 £146 £1,057 £13,673 12.9 yrs £7,473
6 kW 5827 kWh 4079 kWh 1748 kWh £1,094 £175 £1,269 £15,707 12.4 yrs £9,668
7 kW 6798 kWh 4759 kWh 2039 kWh £1,276 £204 £1,480 £17,742 12.0 yrs £11,863
8 kW 7769 kWh 5438 kWh 2331 kWh £1,459 £233 £1,692 £19,776 11.7 yrs £14,058

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: £1,082, Upfront: £15,423, Break-even: 14.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1942 kWh 1418 kWh 524 kWh £380 £52 £433 £9,319 21.5 yrs £-665
3 kW 2913 kWh 2127 kWh 787 kWh £570 £79 £649 £11,354 17.5 yrs £1,628
4 kW 3885 kWh 2836 kWh 1049 kWh £761 £105 £865 £13,388 15.5 yrs £3,921
5 kW 4856 kWh 3545 kWh 1311 kWh £951 £131 £1,082 £15,423 14.3 yrs £6,214
6 kW 5827 kWh 4254 kWh 1573 kWh £1,141 £157 £1,298 £17,457 13.4 yrs £8,506
7 kW 6798 kWh 4963 kWh 1835 kWh £1,331 £184 £1,515 £19,492 12.9 yrs £10,799
8 kW 7769 kWh 5672 kWh 2098 kWh £1,521 £210 £1,731 £21,526 12.4 yrs £13,092

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: £1,098, 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 1942 kWh 1457 kWh 486 kWh £391 £49 £439 £11,069 25.2 yrs £-2,284
3 kW 2913 kWh 2185 kWh 728 kWh £586 £73 £659 £13,104 19.9 yrs £74
4 kW 3885 kWh 2913 kWh 971 kWh £781 £97 £879 £15,138 17.2 yrs £2,432
5 kW 4856 kWh 3642 kWh 1214 kWh £977 £121 £1,098 £17,173 15.6 yrs £4,790
6 kW 5827 kWh 4370 kWh 1457 kWh £1,172 £146 £1,318 £19,207 14.6 yrs £7,148
7 kW 6798 kWh 5099 kWh 1700 kWh £1,367 £170 £1,537 £21,242 13.8 yrs £9,506
8 kW 7769 kWh 5827 kWh 1942 kWh £1,563 £194 £1,757 £23,276 13.2 yrs £11,864

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: £1,114, Upfront: £19,623, Break-even: 17.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1942 kWh 1496 kWh 447 kWh £401 £45 £446 £13,519 30.3 yrs £-4,603
3 kW 2913 kWh 2243 kWh 670 kWh £602 £67 £669 £15,554 23.3 yrs £-2,180
4 kW 3885 kWh 2991 kWh 893 kWh £802 £89 £892 £17,588 19.7 yrs £244
5 kW 4856 kWh 3739 kWh 1117 kWh £1,003 £112 £1,114 £19,623 17.6 yrs £2,667
6 kW 5827 kWh 4487 kWh 1340 kWh £1,203 £134 £1,337 £21,657 16.2 yrs £5,090
7 kW 6798 kWh 5235 kWh 1564 kWh £1,404 £156 £1,560 £23,692 15.2 yrs £7,514
8 kW 7769 kWh 5982 kWh 1787 kWh £1,604 £179 £1,783 £25,726 14.4 yrs £9,937

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 EX32

Figures below are tailored to EX32 — click through for full league tables.

Big-Roof Britain Rank #1343 of 2182
4.8 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #1123 of 2997
10.9 years (UK avg 11.3 years)
~£935 /yr • £10,173 upfront
Standing-Charge Drag Rank #1633 of 2997
21.1% (UK avg 21.7%) drag on savings
£197 fixed • ~£935 /yr value

Your Area at a Glance

Your Electricity Rate
26.82p/kWh
Daily Fixed Charge
54.03p/day
Local Sunshine
971kWh/kW
A 1 kW system generates ~971 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: 65% • Flats: 24% • Bungalows: 9% Based on 6,560 properties

Coverage

North Devon (100%)

Areas Covered

Barnstaple Central, Landkey, Barnstaple with Westacott, Newport, Barnstaple with Pilton, North Molton, Bratton Fleming, Chittlehampton + 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

EX31 (North Devon)
≈1.9 km away
Local sunshine: ~986 kWh/kWp · +2% vs EX32
EX33 (North Devon)
≈8.9 km away
Local sunshine: ~1,020 kWh/kWp · +5% vs EX32
EX37 (North Devon)
≈13.0 km away
Local sunshine: ~964 kWh/kWp · -1% vs EX32
EX39 (Torridge)
≈13.2 km away
Local sunshine: ~1,011 kWh/kWp · +4% vs EX32
EX34 (North Devon)
≈15.0 km away
Local sunshine: ~950 kWh/kWp · -2% vs EX32
EX38 (Torridge)
≈15.5 km away
Local sunshine: ~975 kWh/kWp · +0% vs EX32

Similar sunshine across the UK

NP44 (Torfaen)
~971 kWh/kWp · -0% vs EX32
YO15 (East Riding of Yorkshire)
~971 kWh/kWp · -0% vs EX32
NG12 (Rushcliffe)
~971 kWh/kWp · +0% vs EX32