Solar explained to clever people by people who are not trying to be clever
Home Regions
Insights
Big Roof Britain Solar Payback Index Standing Charge Drag

Solar Panels in CF63 (Vale of Glamorgan)

See if solar pays off for you in Vale of Glamorgan — 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
11.8 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£863
What you save every year
Profit Over 25 Years
£11,413
After paying itself off, you're this much ahead

Ready to Get Started?

Get your free quote from Blue Ape Renewables. They'll connect you with MCS-certified installers in your area and handle all the paperwork.

Get Solar Quote →
4.8★ Trustpilot • Octopus Energy trusted partner • MCS certified • No obligation
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 South Wales, the current unit rate is 26.83p/kWh with a 51.69p/day standing charge. Your postcode’s south-facing sunshine yield is 1032 kWh/kW — 64 above the regional median (968).

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 1032 kWh per year on a south-facing roof. We value self-used electricity at 26.8p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
26.8p/kWh
Standing charge
51.7p/day
Sunshine yield (south)
1032 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: £863, Upfront: £10,173, Break-even: 11.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2064 kWh 826 kWh 1238 kWh £222 £124 £345 £4,069 11.8 yrs £2,838
3 kW 3096 kWh 1238 kWh 1858 kWh £332 £186 £518 £6,104 11.8 yrs £4,257
4 kW 4128 kWh 1651 kWh 2477 kWh £443 £248 £691 £8,138 11.8 yrs £5,677
5 kW 5160 kWh 2064 kWh 3096 kWh £554 £310 £863 £10,173 11.8 yrs £7,096
6 kW 6192 kWh 2477 kWh 3715 kWh £665 £372 £1,036 £12,207 11.8 yrs £8,515
7 kW 7224 kWh 2890 kWh 4335 kWh £775 £433 £1,209 £14,242 11.8 yrs £9,934
8 kW 8256 kWh 3303 kWh 4954 kWh £886 £495 £1,381 £16,276 11.8 yrs £11,353

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: £1,037, Upfront: £12,273, Break-even: 11.8 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2064 kWh 1238 kWh 826 kWh £332 £83 £415 £6,169 14.9 yrs £2,128
3 kW 3096 kWh 1858 kWh 1238 kWh £498 £124 £622 £8,204 13.2 yrs £4,242
4 kW 4128 kWh 2477 kWh 1651 kWh £665 £165 £830 £10,238 12.3 yrs £6,356
5 kW 5160 kWh 3096 kWh 2064 kWh £831 £206 £1,037 £12,273 11.8 yrs £8,470
6 kW 6192 kWh 3715 kWh 2477 kWh £997 £248 £1,245 £14,307 11.5 yrs £10,584
7 kW 7224 kWh 4335 kWh 2890 kWh £1,163 £289 £1,452 £16,342 11.3 yrs £12,697
8 kW 8256 kWh 4954 kWh 3303 kWh £1,329 £330 £1,659 £18,376 11.1 yrs £14,811

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: £1,124, Upfront: £13,673, Break-even: 12.2 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2064 kWh 1445 kWh 619 kWh £388 £62 £450 £7,569 16.8 yrs £1,423
3 kW 3096 kWh 2167 kWh 929 kWh £581 £93 £674 £9,604 14.2 yrs £3,884
4 kW 4128 kWh 2890 kWh 1238 kWh £775 £124 £899 £11,638 12.9 yrs £6,345
5 kW 5160 kWh 3612 kWh 1548 kWh £969 £155 £1,124 £13,673 12.2 yrs £8,807
6 kW 6192 kWh 4335 kWh 1858 kWh £1,163 £186 £1,349 £15,707 11.6 yrs £11,268
7 kW 7224 kWh 5057 kWh 2167 kWh £1,357 £217 £1,574 £17,742 11.3 yrs £13,729
8 kW 8256 kWh 5779 kWh 2477 kWh £1,551 £248 £1,798 £19,776 11.0 yrs £16,190

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: £1,150, Upfront: £15,423, 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 2064 kWh 1507 kWh 557 kWh £404 £56 £460 £9,319 20.3 yrs £-119
3 kW 3096 kWh 2260 kWh 836 kWh £606 £84 £690 £11,354 16.5 yrs £2,447
4 kW 4128 kWh 3014 kWh 1115 kWh £809 £111 £920 £13,388 14.6 yrs £5,012
5 kW 5160 kWh 3767 kWh 1393 kWh £1,011 £139 £1,150 £15,423 13.4 yrs £7,578
6 kW 6192 kWh 4520 kWh 1672 kWh £1,213 £167 £1,380 £17,457 12.6 yrs £10,143
7 kW 7224 kWh 5274 kWh 1951 kWh £1,415 £195 £1,610 £19,492 12.1 yrs £12,709
8 kW 8256 kWh 6027 kWh 2229 kWh £1,617 £223 £1,840 £21,526 11.7 yrs £15,274

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: £1,167, Upfront: £17,173, 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 2064 kWh 1548 kWh 516 kWh £415 £52 £467 £11,069 23.7 yrs £-1,730
3 kW 3096 kWh 2322 kWh 774 kWh £623 £77 £700 £13,104 18.7 yrs £905
4 kW 4128 kWh 3096 kWh 1032 kWh £831 £103 £934 £15,138 16.2 yrs £3,540
5 kW 5160 kWh 3870 kWh 1290 kWh £1,038 £129 £1,167 £17,173 14.7 yrs £6,175
6 kW 6192 kWh 4644 kWh 1548 kWh £1,246 £155 £1,401 £19,207 13.7 yrs £8,810
7 kW 7224 kWh 5418 kWh 1806 kWh £1,454 £181 £1,634 £21,242 13.0 yrs £11,445
8 kW 8256 kWh 6192 kWh 2064 kWh £1,661 £206 £1,868 £23,276 12.5 yrs £14,080

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: £1,185, Upfront: £19,623, Break-even: 16.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 2064 kWh 1589 kWh 475 kWh £426 £47 £474 £13,519 28.5 yrs £-4,041
3 kW 3096 kWh 2384 kWh 712 kWh £640 £71 £711 £15,554 21.9 yrs £-1,337
4 kW 4128 kWh 3179 kWh 949 kWh £853 £95 £948 £17,588 18.6 yrs £1,368
5 kW 5160 kWh 3973 kWh 1187 kWh £1,066 £119 £1,185 £19,623 16.6 yrs £4,072
6 kW 6192 kWh 4768 kWh 1424 kWh £1,279 £142 £1,422 £21,657 15.2 yrs £6,777
7 kW 7224 kWh 5563 kWh 1662 kWh £1,492 £166 £1,659 £23,692 14.3 yrs £9,481
8 kW 8256 kWh 6357 kWh 1899 kWh £1,706 £190 £1,896 £25,726 13.6 yrs £12,186

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 CF63

Figures below are tailored to CF63 — click through for full league tables.

Big-Roof Britain Rank #1532 of 2182
4.7 kWp (UK avg 5.1 kWp)
~10 panels (≈430 W)
Solar Payback Index Rank #259 of 2997
10.2 years (UK avg 11.3 years)
~£994 /yr • £10,173 upfront
Standing-Charge Drag Rank #1236 of 2997
19.0% (UK avg 21.7%) drag on savings
£189 fixed • ~£994 /yr value

Your Area at a Glance

Your Electricity Rate
26.83p/kWh
Daily Fixed Charge
51.69p/day
Local Sunshine
1032kWh/kW
A 1 kW system generates ~1032 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: 66% • Flats: 29% • Bungalows: 4% Based on 7,711 properties

Coverage

Vale of Glamorgan (100%)

Areas Covered

Cadoc, Buttrills, Castleland, Court, Gibbonsdown, Baruc, Dinas Powys, Dyfan

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 South Wales

CF6 (Vale of Glamorgan)
≈0.4 km away
Local sunshine: ~1,010 kWh/kWp · -2% vs CF63
CF62 (Vale of Glamorgan)
≈1.8 km away
Local sunshine: ~1,036 kWh/kWp · +0% vs CF63
CF64 (Vale of Glamorgan)
≈6.3 km away
Local sunshine: ~1,010 kWh/kWp · -2% vs CF63
CF91 (Cardiff)
≈7.8 km away
Local sunshine: ~1,009 kWh/kWp · -2% vs CF63
CF11 (Cardiff)
≈7.8 km away
Local sunshine: ~1,006 kWh/kWp · -2% vs CF63
CF5 (Cardiff)
≈8.3 km away
Local sunshine: ~1,024 kWh/kWp · -1% vs CF63

Similar sunshine across the UK

PE36 (King's Lynn and West Norfolk)
~1,032 kWh/kWp · +0% vs CF63
ME19 (Tonbridge and Malling)
~1,032 kWh/kWp · -0% vs CF63
SO15 (Southampton)
~1,032 kWh/kWp · +0% vs CF63