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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in B50 (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
£793
What you save every year
Profit Over 25 Years
£9,641
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 975 kWh/kW — 33 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 975 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)
975 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: £793, 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 1950 kWh 780 kWh 1170 kWh £200 £117 £317 £4,069 12.8 yrs £2,271
3 kW 2925 kWh 1170 kWh 1755 kWh £300 £176 £476 £6,104 12.8 yrs £3,407
4 kW 3900 kWh 1560 kWh 2340 kWh £400 £234 £634 £8,138 12.8 yrs £4,543
5 kW 4875 kWh 1950 kWh 2925 kWh £500 £293 £793 £10,173 12.8 yrs £5,679
6 kW 5851 kWh 2340 kWh 3510 kWh £600 £351 £951 £12,207 12.8 yrs £6,814
7 kW 6826 kWh 2730 kWh 4095 kWh £700 £410 £1,110 £14,242 12.8 yrs £7,950
8 kW 7801 kWh 3120 kWh 4680 kWh £800 £468 £1,268 £16,276 12.8 yrs £9,086

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: £945, Upfront: £12,273, 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 1950 kWh 1170 kWh 780 kWh £300 £78 £378 £6,169 16.3 yrs £1,391
3 kW 2925 kWh 1755 kWh 1170 kWh £450 £117 £567 £8,204 14.5 yrs £3,137
4 kW 3900 kWh 2340 kWh 1560 kWh £600 £156 £756 £10,238 13.5 yrs £4,883
5 kW 4875 kWh 2925 kWh 1950 kWh £750 £195 £945 £12,273 13.0 yrs £6,629
6 kW 5851 kWh 3510 kWh 2340 kWh £900 £234 £1,134 £14,307 12.6 yrs £8,374
7 kW 6826 kWh 4095 kWh 2730 kWh £1,050 £273 £1,323 £16,342 12.4 yrs £10,120
8 kW 7801 kWh 4680 kWh 3120 kWh £1,200 £312 £1,512 £18,376 12.2 yrs £11,866

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: £1,021, Upfront: £13,673, Break-even: 13.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1950 kWh 1365 kWh 585 kWh £350 £59 £409 £7,569 18.5 yrs £601
3 kW 2925 kWh 2048 kWh 878 kWh £525 £88 £613 £9,604 15.7 yrs £2,652
4 kW 3900 kWh 2730 kWh 1170 kWh £700 £117 £817 £11,638 14.2 yrs £4,703
5 kW 4875 kWh 3413 kWh 1463 kWh £875 £146 £1,021 £13,673 13.4 yrs £6,754
6 kW 5851 kWh 4095 kWh 1755 kWh £1,050 £176 £1,226 £15,707 12.8 yrs £8,804
7 kW 6826 kWh 4778 kWh 2048 kWh £1,225 £205 £1,430 £17,742 12.4 yrs £10,855
8 kW 7801 kWh 5461 kWh 2340 kWh £1,400 £234 £1,634 £19,776 12.1 yrs £12,906

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: £1,044, Upfront: £15,423, Break-even: 14.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1950 kWh 1424 kWh 527 kWh £365 £53 £418 £9,319 22.3 yrs £-966
3 kW 2925 kWh 2135 kWh 790 kWh £548 £79 £627 £11,354 18.1 yrs £1,177
4 kW 3900 kWh 2847 kWh 1053 kWh £730 £105 £835 £13,388 16.0 yrs £3,319
5 kW 4875 kWh 3559 kWh 1316 kWh £913 £132 £1,044 £15,423 14.8 yrs £5,461
6 kW 5851 kWh 4271 kWh 1580 kWh £1,095 £158 £1,253 £17,457 13.9 yrs £7,603
7 kW 6826 kWh 4983 kWh 1843 kWh £1,278 £184 £1,462 £19,492 13.3 yrs £9,746
8 kW 7801 kWh 5695 kWh 2106 kWh £1,460 £211 £1,671 £21,526 12.9 yrs £11,888

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: £1,059, Upfront: £17,173, Break-even: 16.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1950 kWh 1463 kWh 488 kWh £375 £49 £424 £11,069 26.1 yrs £-2,594
3 kW 2925 kWh 2194 kWh 731 kWh £563 £73 £636 £13,104 20.6 yrs £-390
4 kW 3900 kWh 2925 kWh 975 kWh £750 £98 £848 £15,138 17.9 yrs £1,813
5 kW 4875 kWh 3657 kWh 1219 kWh £938 £122 £1,059 £17,173 16.2 yrs £4,016
6 kW 5851 kWh 4388 kWh 1463 kWh £1,125 £146 £1,271 £19,207 15.1 yrs £6,219
7 kW 6826 kWh 5119 kWh 1706 kWh £1,313 £171 £1,483 £21,242 14.3 yrs £8,423
8 kW 7801 kWh 5851 kWh 1950 kWh £1,500 £195 £1,695 £23,276 13.7 yrs £10,626

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: £1,075, Upfront: £19,623, Break-even: 18.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1950 kWh 1502 kWh 449 kWh £385 £45 £430 £13,519 31.4 yrs £-4,922
3 kW 2925 kWh 2252 kWh 673 kWh £578 £67 £645 £15,554 24.1 yrs £-2,657
4 kW 3900 kWh 3003 kWh 897 kWh £770 £90 £860 £17,588 20.5 yrs £-393
5 kW 4875 kWh 3754 kWh 1121 kWh £963 £112 £1,075 £19,623 18.3 yrs £1,871
6 kW 5851 kWh 4505 kWh 1346 kWh £1,155 £135 £1,290 £21,657 16.8 yrs £4,135
7 kW 6826 kWh 5256 kWh 1570 kWh £1,348 £157 £1,505 £23,692 15.7 yrs £6,400
8 kW 7801 kWh 6007 kWh 1794 kWh £1,540 £179 £1,719 £25,726 15.0 yrs £8,664

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 B50

Figures below are tailored to B50 — click through for full league tables.

Big-Roof Britain Rank #909 of 2182
5.1 kWp (UK avg 5.1 kWp)
~11 panels (≈430 W)
Solar Payback Index Rank #1504 of 2997
11.2 years (UK avg 11.3 years)
~£907 /yr • £10,173 upfront
Standing-Charge Drag Rank #1671 of 2997
21.3% (UK avg 21.7%) drag on savings
£193 fixed • ~£907 /yr value

Your Area at a Glance

Your Electricity Rate
25.64p/kWh
Daily Fixed Charge
53.00p/day
Local Sunshine
975kWh/kW
A 1 kW system generates ~975 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: 81% • Flats: 8% • Bungalows: 10% Based on 2,166 properties

Coverage

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

Areas Covered

Bidford East, Bidford West, Salford Priors & Alcester Rural, Alcester West, Honeybourne, Pebworth & The Littletons

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

B49 (Stratford-on-Avon)
≈5.4 km away
Local sunshine: ~968 kWh/kWp · -1% vs B50
CV37 (Stratford-on-Avon)
≈10.1 km away
Local sunshine: ~981 kWh/kWp · +1% vs B50
WR11 (Wychavon)
≈10.1 km away
Local sunshine: ~963 kWh/kWp · -1% vs B50
B96 (Redditch)
≈11.3 km away
Local sunshine: ~960 kWh/kWp · -2% vs B50
B80 (Stratford-on-Avon)
≈11.9 km away
Local sunshine: ~963 kWh/kWp · -1% vs B50
GL55 (Cotswold)
≈13.8 km away
Local sunshine: ~988 kWh/kWp · +1% vs B50

Similar sunshine across the UK

HP16 (Buckinghamshire)
~975 kWh/kWp · -0% vs B50
PR8 (Sefton)
~975 kWh/kWp · +0% vs B50
PR9 (Sefton)
~975 kWh/kWp · +0% vs B50