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2019+ BMW 3 AND 4-SERIES FORUMS (G2x Generation) General G20 Sedan / G22 Coupe / G26 Gran Coupe Discussions Maximum 330e charging rate with granny cable?

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      01-28-2020, 05:17 AM   #1
Chuckyarla
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Maximum 330e charging rate with granny cable?

What's the highest rate that's advisable to use with the granny cable? Is 13amp ok or is it best to stick with 10amp?
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      01-28-2020, 08:29 AM   #2
Quervo
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The max rated amperage from a domestic supply in Ireland is a notional 13 amps, but its unlikely anything in normal usage draws that much. If you use the IV=P formula, 13*220=2860W. That's equivalent of almost 29 100W bulbs.
I'd reduce to 10amps max or get an electrician to install a dedicated outdoor socket direct from fuseboard with an RCD. Do not use an extension lead as electrical fires are a real danger in my opinion.
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      01-28-2020, 10:49 AM   #3
joselrl
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The cable that comes with the car has a max output of 10A. You can buy a 16A one but make sure your house wiring/electrical box/plugs support it.

If you want 16A in your garage or something I would go for a wallbox honestly it's mote expensive but you coule already future proof with a 7.2kw or higher charger
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      01-28-2020, 11:00 AM   #4
Quervo
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There's a €600 SEAI grant available in Ireland to install a home charger, you have to have off street parking though.
I take about 4 hrs to fully charge car from a 3.6Kw home unit also the morning pre-heat is completed with no loss of range.
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      01-29-2020, 02:09 AM   #5
Chuckyarla
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Thank you for all that info.
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      01-29-2020, 02:31 AM   #6
wassap
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Ive seen the wall boxes available on ebay for a couple of hundred aswell.
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