Quote:
Originally Posted by hayden55
Isn't there a report some where that listed the amps they charged at with each voltage and recorded the power required at the panel? That would tell us. L1 vs L2 doesn't say much.
A standard test of L1 vs L2 charging at 3 different amp rates would show a lot.
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I don't quite follow your question.
Let me give an anecdote though;
I went from charging my Prius at 120v (L1) and 12 amps to charging at 240v (L2) and 12 amps (same EVSE modified to accept the higher voltage). Doubling either the voltage or the amps doubles the wattage. That means it takes half as long to charge the Prius. The line losses (which are fairly negligible) remain exactly the same because I'm charging at the same amperage.
The only explanation for that resulting in cutting losses in half is that the vehicle spent half the time running pumps and fans and relays and computers during the charging process. It spent half the time charging because it charged at twice the power.
Furthermore, 100% of line losses exhibit as heat, so if there was major line loss, the cables themselves would get quite hot. If someone was charging at 10 kW, and there was 10% line loss, that would be 1,000 watts of heat generated in the cable, which is a huge amount of heat. The cable would burn up, because it wasn't designed to be used as a space heater.