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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in CV37 (Stratford-on-Avon)

See if solar pays off for you in Stratford-on-Avon — 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
12.8 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£797
What you save every year
Profit Over 25 Years
£9,761
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 Midlands, the current unit rate is 25.64p/kWh with a 53.00p/day standing charge. Your postcode’s south-facing sunshine yield is 981 kWh/kW — 39 above the regional median (942).

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 981 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
53.0p/day
Sunshine yield (south)
981 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: £797, Upfront: £10,173, Break-even: 12.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1962 kWh 785 kWh 1177 kWh £201 £118 £319 £4,069 12.8 yrs £2,310
3 kW 2943 kWh 1177 kWh 1766 kWh £302 £177 £478 £6,104 12.8 yrs £3,465
4 kW 3924 kWh 1570 kWh 2354 kWh £402 £235 £638 £8,138 12.8 yrs £4,620
5 kW 4905 kWh 1962 kWh 2943 kWh £503 £294 £797 £10,173 12.8 yrs £5,774
6 kW 5886 kWh 2354 kWh 3532 kWh £604 £353 £957 £12,207 12.8 yrs £6,929
7 kW 6867 kWh 2747 kWh 4120 kWh £704 £412 £1,116 £14,242 12.8 yrs £8,084
8 kW 7848 kWh 3139 kWh 4709 kWh £805 £471 £1,276 £16,276 12.8 yrs £9,239

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: £951, Upfront: £12,273, 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 1962 kWh 1177 kWh 785 kWh £302 £78 £380 £6,169 16.2 yrs £1,437
3 kW 2943 kWh 1766 kWh 1177 kWh £453 £118 £570 £8,204 14.4 yrs £3,206
4 kW 3924 kWh 2354 kWh 1570 kWh £604 £157 £761 £10,238 13.5 yrs £4,974
5 kW 4905 kWh 2943 kWh 1962 kWh £755 £196 £951 £12,273 12.9 yrs £6,743
6 kW 5886 kWh 3532 kWh 2354 kWh £905 £235 £1,141 £14,307 12.5 yrs £8,512
7 kW 6867 kWh 4120 kWh 2747 kWh £1,056 £275 £1,331 £16,342 12.3 yrs £10,280
8 kW 7848 kWh 4709 kWh 3139 kWh £1,207 £314 £1,521 £18,376 12.1 yrs £12,049

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: £1,027, Upfront: £13,673, Break-even: 13.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1962 kWh 1373 kWh 589 kWh £352 £59 £411 £7,569 18.4 yrs £651
3 kW 2943 kWh 2060 kWh 883 kWh £528 £88 £616 £9,604 15.6 yrs £2,726
4 kW 3924 kWh 2747 kWh 1177 kWh £704 £118 £822 £11,638 14.2 yrs £4,802
5 kW 4905 kWh 3433 kWh 1471 kWh £880 £147 £1,027 £13,673 13.3 yrs £6,877
6 kW 5886 kWh 4120 kWh 1766 kWh £1,056 £177 £1,233 £15,707 12.7 yrs £8,953
7 kW 6867 kWh 4807 kWh 2060 kWh £1,232 £206 £1,438 £17,742 12.3 yrs £11,028
8 kW 7848 kWh 5494 kWh 2354 kWh £1,409 £235 £1,644 £19,776 12.0 yrs £13,104

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: £1,051, Upfront: £15,423, Break-even: 14.7 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1962 kWh 1432 kWh 530 kWh £367 £53 £420 £9,319 22.2 yrs £-915
3 kW 2943 kWh 2148 kWh 795 kWh £551 £79 £630 £11,354 18.0 yrs £1,253
4 kW 3924 kWh 2864 kWh 1059 kWh £734 £106 £840 £13,388 15.9 yrs £3,420
5 kW 4905 kWh 3581 kWh 1324 kWh £918 £132 £1,051 £15,423 14.7 yrs £5,588
6 kW 5886 kWh 4297 kWh 1589 kWh £1,102 £159 £1,261 £17,457 13.8 yrs £7,755
7 kW 6867 kWh 5013 kWh 1854 kWh £1,285 £185 £1,471 £19,492 13.3 yrs £9,923
8 kW 7848 kWh 5729 kWh 2119 kWh £1,469 £212 £1,681 £21,526 12.8 yrs £12,090

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: £1,066, Upfront: £17,173, Break-even: 16.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1962 kWh 1471 kWh 490 kWh £377 £49 £426 £11,069 26.0 yrs £-2,542
3 kW 2943 kWh 2207 kWh 736 kWh £566 £74 £640 £13,104 20.5 yrs £-313
4 kW 3924 kWh 2943 kWh 981 kWh £755 £98 £853 £15,138 17.8 yrs £1,915
5 kW 4905 kWh 3679 kWh 1226 kWh £943 £123 £1,066 £17,173 16.1 yrs £4,144
6 kW 5886 kWh 4414 kWh 1471 kWh £1,132 £147 £1,279 £19,207 15.0 yrs £6,373
7 kW 6867 kWh 5150 kWh 1717 kWh £1,321 £172 £1,492 £21,242 14.2 yrs £8,602
8 kW 7848 kWh 5886 kWh 1962 kWh £1,509 £196 £1,705 £23,276 13.6 yrs £10,831

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: £1,081, Upfront: £19,623, Break-even: 18.1 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1962 kWh 1511 kWh 451 kWh £387 £45 £432 £13,519 31.3 yrs £-4,870
3 kW 2943 kWh 2266 kWh 677 kWh £581 £68 £649 £15,554 24.0 yrs £-2,579
4 kW 3924 kWh 3021 kWh 903 kWh £775 £90 £865 £17,588 20.3 yrs £-289
5 kW 4905 kWh 3777 kWh 1128 kWh £968 £113 £1,081 £19,623 18.1 yrs £2,001
6 kW 5886 kWh 4532 kWh 1354 kWh £1,162 £135 £1,297 £21,657 16.7 yrs £4,291
7 kW 6867 kWh 5288 kWh 1579 kWh £1,356 £158 £1,514 £23,692 15.7 yrs £6,582
8 kW 7848 kWh 6043 kWh 1805 kWh £1,549 £181 £1,730 £25,726 14.9 yrs £8,872

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 CV37

Figures below are tailored to CV37 — click through for full league tables.

Big-Roof Britain Rank #1203 of 2182
4.9 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #1334 of 2997
11.1 years (UK avg 11.3 years)
~£912 /yr • £10,173 upfront
Standing-Charge Drag Rank #1640 of 2997
21.2% (UK avg 21.7%) drag on savings
£193 fixed • ~£912 /yr value

Your Area at a Glance

Your Electricity Rate
25.64p/kWh
Daily Fixed Charge
53.00p/day
Local Sunshine
981kWh/kW
A 1 kW system generates ~981 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: 70% • Flats: 21% • Bungalows: 8% Based on 18,209 properties

Coverage

Stratford-on-Avon (98%)|Wychavon (2%)

Areas Covered

Stratford Clopton, Stratford Guildhall & Bridgetown, Stratford Welcombe, Long Marston, Welford-on-Avon, Stratford Hathaway, Stratford Tiddington, Stratford Orchard Hill + 4 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 Midlands

B50 (Stratford-on-Avon)
≈10.1 km away
Local sunshine: ~975 kWh/kWp · -1% vs CV37
B49 (Stratford-on-Avon)
≈10.7 km away
Local sunshine: ~968 kWh/kWp · -1% vs CV37
B80 (Stratford-on-Avon)
≈14.8 km away
Local sunshine: ~963 kWh/kWp · -2% vs CV37
CV36 (Stratford-on-Avon)
≈16.0 km away
Local sunshine: ~979 kWh/kWp · -0% vs CV37
GL55 (Cotswold)
≈16.4 km away
Local sunshine: ~988 kWh/kWp · +1% vs CV37
B96 (Redditch)
≈16.7 km away
Local sunshine: ~960 kWh/kWp · -2% vs CV37

Similar sunshine across the UK

LA14 (Westmorland and Furness)
~981 kWh/kWp · -0% vs CV37
LA13 (Westmorland and Furness)
~981 kWh/kWp · +0% vs CV37
HP5 (Buckinghamshire)
~981 kWh/kWp · -0% vs CV37