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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in SY4 (Shropshire)

See if solar pays off for you in Shropshire — 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
£974
What you save every year
Profit Over 25 Years
£12,133
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 North Wales and Mersey, the current unit rate is 27.72p/kWh with a 69.95p/day standing charge. Your postcode’s south-facing sunshine yield is 950 kWh/kW — 20 above the regional median (930).

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 950 kWh per year on a south-facing roof. We value self-used electricity at 27.7p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
27.7p/kWh
Standing charge
70.0p/day
Sunshine yield (south)
950 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: £811, 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 1899 kWh 760 kWh 1140 kWh £211 £114 £325 £4,069 12.5 yrs £2,422
3 kW 2849 kWh 1140 kWh 1709 kWh £316 £171 £487 £6,104 12.5 yrs £3,633
4 kW 3798 kWh 1519 kWh 2279 kWh £421 £228 £649 £8,138 12.5 yrs £4,844
5 kW 4748 kWh 1899 kWh 2849 kWh £526 £285 £811 £10,173 12.5 yrs £6,054
6 kW 5698 kWh 2279 kWh 3419 kWh £632 £342 £974 £12,207 12.5 yrs £7,265
7 kW 6647 kWh 2659 kWh 3988 kWh £737 £399 £1,136 £14,242 12.5 yrs £8,476
8 kW 7597 kWh 3039 kWh 4558 kWh £842 £456 £1,298 £16,276 12.5 yrs £9,687

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 1899 kWh 1140 kWh 760 kWh £316 £76 £392 £6,169 15.7 yrs £1,668
3 kW 2849 kWh 1709 kWh 1140 kWh £474 £114 £588 £8,204 14.0 yrs £3,552
4 kW 3798 kWh 2279 kWh 1519 kWh £632 £152 £784 £10,238 13.1 yrs £5,436
5 kW 4748 kWh 2849 kWh 1899 kWh £790 £190 £980 £12,273 12.5 yrs £7,320
6 kW 5698 kWh 3419 kWh 2279 kWh £948 £228 £1,176 £14,307 12.2 yrs £9,204
7 kW 6647 kWh 3988 kWh 2659 kWh £1,106 £266 £1,371 £16,342 11.9 yrs £11,088
8 kW 7597 kWh 4558 kWh 3039 kWh £1,264 £304 £1,567 £18,376 11.7 yrs £12,972

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: £1,064, 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 1899 kWh 1329 kWh 570 kWh £369 £57 £426 £7,569 17.8 yrs £941
3 kW 2849 kWh 1994 kWh 855 kWh £553 £85 £638 £9,604 15.0 yrs £3,162
4 kW 3798 kWh 2659 kWh 1140 kWh £737 £114 £851 £11,638 13.7 yrs £5,382
5 kW 4748 kWh 3324 kWh 1424 kWh £921 £142 £1,064 £13,673 12.9 yrs £7,603
6 kW 5698 kWh 3988 kWh 1709 kWh £1,106 £171 £1,277 £15,707 12.3 yrs £9,823
7 kW 6647 kWh 4653 kWh 1994 kWh £1,290 £199 £1,489 £17,742 11.9 yrs £12,044
8 kW 7597 kWh 5318 kWh 2279 kWh £1,474 £228 £1,702 £19,776 11.6 yrs £14,264

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: £1,089, 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 1899 kWh 1386 kWh 513 kWh £384 £51 £436 £9,319 21.4 yrs £-607
3 kW 2849 kWh 2080 kWh 769 kWh £576 £77 £653 £11,354 17.4 yrs £1,714
4 kW 3798 kWh 2773 kWh 1026 kWh £769 £103 £871 £13,388 15.4 yrs £4,036
5 kW 4748 kWh 3466 kWh 1282 kWh £961 £128 £1,089 £15,423 14.2 yrs £6,357
6 kW 5698 kWh 4159 kWh 1538 kWh £1,153 £154 £1,307 £17,457 13.4 yrs £8,679
7 kW 6647 kWh 4853 kWh 1795 kWh £1,345 £179 £1,525 £19,492 12.8 yrs £11,000
8 kW 7597 kWh 5546 kWh 2051 kWh £1,537 £205 £1,742 £21,526 12.4 yrs £13,322

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: £1,106, Upfront: £17,173, Break-even: 15.5 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1899 kWh 1424 kWh 475 kWh £395 £47 £442 £11,069 25.0 yrs £-2,222
3 kW 2849 kWh 2137 kWh 712 kWh £592 £71 £663 £13,104 19.7 yrs £166
4 kW 3798 kWh 2849 kWh 950 kWh £790 £95 £885 £15,138 17.1 yrs £2,555
5 kW 4748 kWh 3561 kWh 1187 kWh £987 £119 £1,106 £17,173 15.5 yrs £4,944
6 kW 5698 kWh 4273 kWh 1424 kWh £1,185 £142 £1,327 £19,207 14.5 yrs £7,333
7 kW 6647 kWh 4985 kWh 1662 kWh £1,382 £166 £1,548 £21,242 13.7 yrs £9,721
8 kW 7597 kWh 5698 kWh 1899 kWh £1,579 £190 £1,769 £23,276 13.2 yrs £12,110

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: £1,123, 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 1899 kWh 1462 kWh 437 kWh £405 £44 £449 £13,519 30.1 yrs £-4,538
3 kW 2849 kWh 2194 kWh 655 kWh £608 £66 £674 £15,554 23.1 yrs £-2,082
4 kW 3798 kWh 2925 kWh 874 kWh £811 £87 £898 £17,588 19.6 yrs £374
5 kW 4748 kWh 3656 kWh 1092 kWh £1,013 £109 £1,123 £19,623 17.5 yrs £2,830
6 kW 5698 kWh 4387 kWh 1310 kWh £1,216 £131 £1,347 £21,657 16.1 yrs £5,286
7 kW 6647 kWh 5118 kWh 1529 kWh £1,419 £153 £1,572 £23,692 15.1 yrs £7,743
8 kW 7597 kWh 5850 kWh 1747 kWh £1,622 £175 £1,796 £25,726 14.3 yrs £10,199

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 SY4

Figures below are tailored to SY4 — click through for full league tables.

Big-Roof Britain Rank #210 of 2182
6.1 kWp (UK avg 5.1 kWp)
~13 panels (≈430 W)
Solar Payback Index Rank #1186 of 2997
10.9 years (UK avg 11.3 years)
~£1,125 /yr • £12,207 upfront
Standing-Charge Drag Rank #2040 of 2997
22.7% (UK avg 21.7%) drag on savings
£255 fixed • ~£1,125 /yr value

Your Area at a Glance

Your Electricity Rate
27.72p/kWh
Daily Fixed Charge
69.95p/day
Local Sunshine
950kWh/kW
A 1 kW system generates ~950 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: 73% • Flats: 7% • Bungalows: 19% Based on 6,868 properties

Coverage

Shropshire (98%)|Telford and Wrekin (2%)

Areas Covered

Wem, Tern, Ruyton & Baschurch, Shawbury, The Meres, Loton, Quarry & Coton Hill, Hodnet + 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 North Wales and Mersey

SY12 (Shropshire)
≈16.7 km away
Local sunshine: ~937 kWh/kWp · -1% vs SY4
SY13 (Shropshire)
≈19.5 km away
Local sunshine: ~939 kWh/kWp · -1% vs SY4
SY11 (Shropshire)
≈22.0 km away
Local sunshine: ~944 kWh/kWp · -1% vs SY4
SY10 (Shropshire)
≈22.8 km away
Local sunshine: ~929 kWh/kWp · -2% vs SY4
SY14 (Cheshire West and Chester)
≈25.8 km away
Local sunshine: ~935 kWh/kWp · -2% vs SY4
SY22 (Powys)
≈29.4 km away
Local sunshine: ~926 kWh/kWp · -3% vs SY4

Similar sunshine across the UK

DG6 (Dumfries and Galloway)
~950 kWh/kWp · -0% vs SY4
EX34 (North Devon)
~950 kWh/kWp · +0% vs SY4
SA37 (Pembrokeshire)
~950 kWh/kWp · +0% vs SY4