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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in CV2 (Coventry)

See if solar pays off for you in Coventry — 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
13.0 years
After this, it's pure profit
Upfront Cost
£8,138
What you pay to get started
Annual Benefit
£628
What you save every year
Profit Over 25 Years
£7,567
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 East Midlands, the current unit rate is 25.55p/kWh with a 49.09p/day standing charge. Your postcode’s south-facing sunshine yield is 968 kWh/kW — 0 above the regional median (968).

Read the full story

A typical roof here lands around 4.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 968 kWh per year on a south-facing roof. We value self-used electricity at 25.6p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
25.6p/kWh
Standing charge
49.1p/day
Sunshine yield (south)
968 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: £785, Upfront: £10,173, Break-even: 13.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1936 kWh 775 kWh 1162 kWh £198 £116 £314 £4,069 13.0 yrs £2,213
3 kW 2905 kWh 1162 kWh 1743 kWh £297 £174 £471 £6,104 13.0 yrs £3,319
4 kW 3873 kWh 1549 kWh 2324 kWh £396 £232 £628 £8,138 13.0 yrs £4,426
5 kW 4841 kWh 1936 kWh 2905 kWh £495 £290 £785 £10,173 13.0 yrs £5,532
6 kW 5809 kWh 2324 kWh 3486 kWh £594 £349 £942 £12,207 13.0 yrs £6,639
7 kW 6778 kWh 2711 kWh 4067 kWh £693 £407 £1,099 £14,242 13.0 yrs £7,745
8 kW 7746 kWh 3098 kWh 4648 kWh £792 £465 £1,256 £16,276 13.0 yrs £8,851

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: £936, Upfront: £12,273, Break-even: 13.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1936 kWh 1162 kWh 775 kWh £297 £77 £374 £6,169 16.5 yrs £1,317
3 kW 2905 kWh 1743 kWh 1162 kWh £445 £116 £561 £8,204 14.6 yrs £3,026
4 kW 3873 kWh 2324 kWh 1549 kWh £594 £155 £749 £10,238 13.7 yrs £4,735
5 kW 4841 kWh 2905 kWh 1936 kWh £742 £194 £936 £12,273 13.1 yrs £6,443
6 kW 5809 kWh 3486 kWh 2324 kWh £891 £232 £1,123 £14,307 12.7 yrs £8,152
7 kW 6778 kWh 4067 kWh 2711 kWh £1,039 £271 £1,310 £16,342 12.5 yrs £9,861
8 kW 7746 kWh 4648 kWh 3098 kWh £1,187 £310 £1,497 £18,376 12.3 yrs £11,569

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: £1,011, Upfront: £13,673, 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 1936 kWh 1356 kWh 581 kWh £346 £58 £404 £7,569 18.7 yrs £520
3 kW 2905 kWh 2033 kWh 871 kWh £520 £87 £607 £9,604 15.8 yrs £2,529
4 kW 3873 kWh 2711 kWh 1162 kWh £693 £116 £809 £11,638 14.4 yrs £4,539
5 kW 4841 kWh 3389 kWh 1452 kWh £866 £145 £1,011 £13,673 13.5 yrs £6,549
6 kW 5809 kWh 4067 kWh 1743 kWh £1,039 £174 £1,213 £15,707 12.9 yrs £8,559
7 kW 6778 kWh 4744 kWh 2033 kWh £1,212 £203 £1,416 £17,742 12.5 yrs £10,569
8 kW 7746 kWh 5422 kWh 2324 kWh £1,385 £232 £1,618 £19,776 12.2 yrs £12,578

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: £1,034, Upfront: £15,423, Break-even: 14.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1936 kWh 1414 kWh 523 kWh £361 £52 £413 £9,319 22.5 yrs £-1,050
3 kW 2905 kWh 2120 kWh 784 kWh £542 £78 £620 £11,354 18.3 yrs £1,050
4 kW 3873 kWh 2827 kWh 1046 kWh £722 £105 £827 £13,388 16.2 yrs £3,150
5 kW 4841 kWh 3534 kWh 1307 kWh £903 £131 £1,034 £15,423 14.9 yrs £5,251
6 kW 5809 kWh 4241 kWh 1569 kWh £1,084 £157 £1,240 £17,457 14.1 yrs £7,351
7 kW 6778 kWh 4948 kWh 1830 kWh £1,264 £183 £1,447 £19,492 13.5 yrs £9,451
8 kW 7746 kWh 5654 kWh 2091 kWh £1,445 £209 £1,654 £21,526 13.0 yrs £11,551

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: £1,049, Upfront: £17,173, Break-even: 16.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1936 kWh 1452 kWh 484 kWh £371 £48 £419 £11,069 26.4 yrs £-2,679
3 kW 2905 kWh 2179 kWh 726 kWh £557 £73 £629 £13,104 20.8 yrs £-519
4 kW 3873 kWh 2905 kWh 968 kWh £742 £97 £839 £15,138 18.0 yrs £1,641
5 kW 4841 kWh 3631 kWh 1210 kWh £928 £121 £1,049 £17,173 16.4 yrs £3,802
6 kW 5809 kWh 4357 kWh 1452 kWh £1,113 £145 £1,258 £19,207 15.3 yrs £5,962
7 kW 6778 kWh 5083 kWh 1694 kWh £1,299 £169 £1,468 £21,242 14.5 yrs £8,122
8 kW 7746 kWh 5809 kWh 1936 kWh £1,484 £194 £1,678 £23,276 13.9 yrs £10,283

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: £1,064, Upfront: £19,623, Break-even: 18.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1936 kWh 1491 kWh 445 kWh £381 £45 £426 £13,519 31.8 yrs £-5,009
3 kW 2905 kWh 2237 kWh 668 kWh £571 £67 £638 £15,554 24.4 yrs £-2,788
4 kW 3873 kWh 2982 kWh 891 kWh £762 £89 £851 £17,588 20.7 yrs £-568
5 kW 4841 kWh 3728 kWh 1113 kWh £952 £111 £1,064 £19,623 18.4 yrs £1,653
6 kW 5809 kWh 4473 kWh 1336 kWh £1,143 £134 £1,277 £21,657 17.0 yrs £3,873
7 kW 6778 kWh 5219 kWh 1559 kWh £1,333 £156 £1,489 £23,692 15.9 yrs £6,094
8 kW 7746 kWh 5964 kWh 1782 kWh £1,524 £178 £1,702 £25,726 15.1 yrs £8,315

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 CV2

Figures below are tailored to CV2 — click through for full league tables.

Big-Roof Britain Rank #1866 of 2182
4.3 kWp (UK avg 5.1 kWp)
~9 panels (≈430 W)
Solar Payback Index Rank #1569 of 2997
11.3 years (UK avg 11.3 years)
~£719 /yr • £8,138 upfront
Standing-Charge Drag Rank #2198 of 2997
24.9% (UK avg 21.7%) drag on savings
£179 fixed • ~£719 /yr value

Your Area at a Glance

Your Electricity Rate
25.55p/kWh
Daily Fixed Charge
49.09p/day
Local Sunshine
968kWh/kW
A 1 kW system generates ~968 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
4.0kW
For houses & bungalows in this area

Local Property Data

Property Types

Houses: 69% • Flats: 22% • Bungalows: 6% Based on 23,497 properties

Coverage

Coventry (99%)|Rugby (1%)

Areas Covered

Henley, Upper Stoke, Wyken, St Michael's, Lower Stoke, Longford, Foleshill, Revel and Binley Woods + 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 East Midlands

CV6 (Coventry)
≈3.3 km away
Local sunshine: ~956 kWh/kWp · -1% vs CV2
CV1 (Coventry)
≈3.3 km away
Local sunshine: ~958 kWh/kWp · -1% vs CV2
CV3 (Coventry)
≈3.4 km away
Local sunshine: ~961 kWh/kWp · -1% vs CV2
CV5 (Coventry)
≈5.7 km away
Local sunshine: ~968 kWh/kWp · -0% vs CV2
CV12 (Nuneaton and Bedworth)
≈6.5 km away
Local sunshine: ~961 kWh/kWp · -1% vs CV2
CV7 (Solihull)
≈6.5 km away
Local sunshine: ~968 kWh/kWp · -0% vs CV2

Similar sunshine across the UK

HU5 (Kingston upon Hull, City of)
~968 kWh/kWp · -0% vs CV2
HU16 (East Riding of Yorkshire)
~968 kWh/kWp · +0% vs CV2
HU3 (Kingston upon Hull, City of)
~968 kWh/kWp · -0% vs CV2