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On Tesla's website, it states that NEMA 6-20 gets 15 mph for M3, and 5-20 gets 4 mph. That is exactly 3.75 times as many mph. I understand that watts = amps * voltage, so that equals 240x20=4800 and 120x20=2400. That would be twice the watts, exactly.
What am I missing?
Their numbers are wrong. You'll get double the charge rate.
If you keep the amperage the same and double the voltage, your charge rate will double. It's a fact.
How can any informed individual disagree with my statement? If you keep the amperage the same and double the voltage, your charge rate will double. It's a fact.
The AC input power will double. I suppose the disagreement (which does seem a bit excessive) was that the charge rate will more than double, due to fixed overhead, and to a lesser extent, efficiency changes in the AC-DC converter with a lower input power.
Charging 120v vs 240v efficiency
Nope. You'll never see any efficiency differences due to 120V 20A vs 240V 20A. Any minuscule variation from a 1-to-2 ratio will be lost in the integer mph rating. Tesla's 4 vs 15 mph charge rate is simply laughable and isn't even close to the realm of reality.
Nope. You'll never see any efficiency differences due to 120V 20A vs 240V 20A. Any minuscule variation from a 1-to-2 ratio will be lost in the integer mph rating. Tesla's 4 vs 15 mph charge rate is simply laughable and isn't even close to the realm of reality.
Nope. You'll never see any efficiency differences due to 120V 20A vs 240V 20A. Any minuscule variation from a 1-to-2 ratio will be lost in the integer mph rating.
Tesla's 4 vs 15 mph charge rate is simply laughable and isn't even close to the realm of reality.
Hmm. Is the 3 charger different than the S? I noticed higher efficiency charging at 240v in my old S. Even high amperage 120v 30A campground charging wasn't as fast as you'd expect from the wattage.
I don't think you can charge higher than 16A at 120v even if the breaker is rated higher than 20A (do you remember what the screen read?). ...