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Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in SY24 (Ceredigion)

See if solar pays off for you in Ceredigion — 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
13.5 years
After this, it's pure profit
Upfront Cost
£12,207
What you pay to get started
Annual Benefit
£902
What you save every year
Profit Over 25 Years
£10,349
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 880 kWh/kW — 50 below 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 880 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)
880 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: £752, Upfront: £10,173, 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 1760 kWh 704 kWh 1056 kWh £195 £106 £301 £4,069 13.5 yrs £1,946
3 kW 2640 kWh 1056 kWh 1584 kWh £293 £158 £451 £6,104 13.5 yrs £2,919
4 kW 3520 kWh 1408 kWh 2112 kWh £390 £211 £601 £8,138 13.5 yrs £3,892
5 kW 4400 kWh 1760 kWh 2640 kWh £488 £264 £752 £10,173 13.5 yrs £4,865
6 kW 5280 kWh 2112 kWh 3168 kWh £585 £317 £902 £12,207 13.5 yrs £5,838
7 kW 6160 kWh 2464 kWh 3696 kWh £683 £370 £1,053 £14,242 13.5 yrs £6,811
8 kW 7040 kWh 2816 kWh 4224 kWh £781 £422 £1,203 £16,276 13.5 yrs £7,784

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: £908, Upfront: £12,273, 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 1760 kWh 1056 kWh 704 kWh £293 £70 £363 £6,169 17.0 yrs £1,093
3 kW 2640 kWh 1584 kWh 1056 kWh £439 £106 £545 £8,204 15.1 yrs £2,690
4 kW 3520 kWh 2112 kWh 1408 kWh £585 £141 £726 £10,238 14.1 yrs £4,287
5 kW 4400 kWh 2640 kWh 1760 kWh £732 £176 £908 £12,273 13.5 yrs £5,884
6 kW 5280 kWh 3168 kWh 2112 kWh £878 £211 £1,089 £14,307 13.1 yrs £7,480
7 kW 6160 kWh 3696 kWh 2464 kWh £1,025 £246 £1,271 £16,342 12.9 yrs £9,077
8 kW 7040 kWh 4224 kWh 2816 kWh £1,171 £282 £1,452 £18,376 12.7 yrs £10,674

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: £986, Upfront: £13,673, Break-even: 13.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1760 kWh 1232 kWh 528 kWh £342 £53 £394 £7,569 19.2 yrs £317
3 kW 2640 kWh 1848 kWh 792 kWh £512 £79 £591 £9,604 16.2 yrs £2,226
4 kW 3520 kWh 2464 kWh 1056 kWh £683 £106 £789 £11,638 14.8 yrs £4,134
5 kW 4400 kWh 3080 kWh 1320 kWh £854 £132 £986 £13,673 13.9 yrs £6,043
6 kW 5280 kWh 3696 kWh 1584 kWh £1,025 £158 £1,183 £15,707 13.3 yrs £7,952
7 kW 6160 kWh 4312 kWh 1848 kWh £1,195 £185 £1,380 £17,742 12.9 yrs £9,860
8 kW 7040 kWh 4928 kWh 2112 kWh £1,366 £211 £1,577 £19,776 12.5 yrs £11,769

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: £1,009, Upfront: £15,423, Break-even: 15.3 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1760 kWh 1285 kWh 475 kWh £356 £48 £404 £9,319 23.1 yrs £-1,246
3 kW 2640 kWh 1927 kWh 713 kWh £534 £71 £605 £11,354 18.8 yrs £756
4 kW 3520 kWh 2570 kWh 950 kWh £712 £95 £807 £13,388 16.6 yrs £2,759
5 kW 4400 kWh 3212 kWh 1188 kWh £890 £119 £1,009 £15,423 15.3 yrs £4,761
6 kW 5280 kWh 3854 kWh 1426 kWh £1,068 £143 £1,211 £17,457 14.4 yrs £6,763
7 kW 6160 kWh 4497 kWh 1663 kWh £1,247 £166 £1,413 £19,492 13.8 yrs £8,765
8 kW 7040 kWh 5139 kWh 1901 kWh £1,425 £190 £1,615 £21,526 13.3 yrs £10,767

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: £1,025, Upfront: £17,173, Break-even: 16.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1760 kWh 1320 kWh 440 kWh £366 £44 £410 £11,069 27.0 yrs £-2,871
3 kW 2640 kWh 1980 kWh 660 kWh £549 £66 £615 £13,104 21.3 yrs £-806
4 kW 3520 kWh 2640 kWh 880 kWh £732 £88 £820 £15,138 18.5 yrs £1,258
5 kW 4400 kWh 3300 kWh 1100 kWh £915 £110 £1,025 £17,173 16.8 yrs £3,323
6 kW 5280 kWh 3960 kWh 1320 kWh £1,098 £132 £1,230 £19,207 15.6 yrs £5,387
7 kW 6160 kWh 4620 kWh 1540 kWh £1,281 £154 £1,435 £21,242 14.8 yrs £7,452
8 kW 7040 kWh 5280 kWh 1760 kWh £1,464 £176 £1,640 £23,276 14.2 yrs £9,516

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: £1,040, Upfront: £19,623, Break-even: 18.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1760 kWh 1355 kWh 405 kWh £376 £40 £416 £13,519 32.5 yrs £-5,196
3 kW 2640 kWh 2033 kWh 607 kWh £563 £61 £624 £15,554 24.9 yrs £-3,069
4 kW 3520 kWh 2710 kWh 810 kWh £751 £81 £832 £17,588 21.1 yrs £-942
5 kW 4400 kWh 3388 kWh 1012 kWh £939 £101 £1,040 £19,623 18.9 yrs £1,185
6 kW 5280 kWh 4066 kWh 1214 kWh £1,127 £121 £1,248 £21,657 17.3 yrs £3,311
7 kW 6160 kWh 4743 kWh 1417 kWh £1,315 £142 £1,456 £23,692 16.3 yrs £5,438
8 kW 7040 kWh 5421 kWh 1619 kWh £1,503 £162 £1,665 £25,726 15.5 yrs £7,565

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 SY24

Figures below are tailored to SY24 — click through for full league tables.

Big-Roof Britain Rank #440 of 2182
5.7 kWp (UK avg 5.1 kWp)
~12 panels (≈430 W)
Solar Payback Index Rank #2033 of 2997
11.7 years (UK avg 11.3 years)
~£1,043 /yr • £12,207 upfront
Standing-Charge Drag Rank #2159 of 2997
24.5% (UK avg 21.7%) drag on savings
£255 fixed • ~£1,043 /yr value

Your Area at a Glance

Your Electricity Rate
27.72p/kWh
Daily Fixed Charge
69.95p/day
Local Sunshine
880kWh/kW
A 1 kW system generates ~880 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: 64% • Flats: 15% • Bungalows: 20% Based on 1,328 properties

Coverage

Ceredigion (100%)

Areas Covered

Borth, Ceulan a Maesmawr, Tirymynach, Aberystwyth Morfa a Glais, Llanfarian

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

LL35 (Gwynedd)
≈7.7 km away
Local sunshine: ~877 kWh/kWp · -0% vs SY24
SY23 (Ceredigion)
≈8.3 km away
Local sunshine: ~924 kWh/kWp · +5% vs SY24
LL36 (Gwynedd)
≈12.9 km away
Local sunshine: ~940 kWh/kWp · +7% vs SY24
SY20 (Powys)
≈17.8 km away
Local sunshine: ~817 kWh/kWp · -7% vs SY24
LL37 (Gwynedd)
≈21.4 km away
Local sunshine: ~878 kWh/kWp · -0% vs SY24
LL38 (Gwynedd)
≈24.4 km away
Local sunshine: ~846 kWh/kWp · -4% vs SY24

Similar sunshine across the UK

BT40 (Mid and East Antrim)
~880 kWh/kWp · +0% vs SY24
KA13 (North Ayrshire)
~880 kWh/kWp · -0% vs SY24
PA48 (Argyll and Bute)
~880 kWh/kWp · +0% vs SY24