Quote:
Originally Posted by Angel
3) I'm not sure that charging with 220v is more efficient, but my impression is that you'll never put a good charge on the battery with a 120v outlet and less than 4 hours.
assume an electrically perfect charging setup (I'd normally assume 80% efficiency to be safe)
120v * 15A (standard outlet) = 1.8kw/hr
220v * 30A (standard dryer outlet, they come in 50A versions also) = 6.6kW/hr
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Nit to pick -- the numbers you're quoting are just kW, not kW/h. If you want to put it into context for charging a battery which is rated in kW-h, I suppose you could write it as kW-h/h where the hours cancel out.