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- Feb 3, 2020
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- Mach-E FE reserved, Nissan Leaf, Toyota Tacoma
TL;DR: A 32A ($180) or 40A ($180) TeslaTap works fine on an 80A Tesla L2 Charger (not Supercharger) but will potentially charge more slowly than a 80A Tesla Tap ($240). However, we think a Mach E doesn't charge over about 11.5kW so the 50A Tesla Tap ($190) is all you need for it.Hmm, that would be great if that is the case. Do you have confirmation of that? I planned on getting one also for the same reason - lots of hotels have tesla destination chargers. I'm just worried that the car and charger will negotiate to 11.5kw and overheat the adapter.
Tesla Tap has several well-written pages on this:
How EVSEs work
pages for each Tesla Tap model
You can also read more at:
and a really nice powerpoint at
https://ewh.ieee.org/r3/nashville/e... Review_of_Basics - IEEE - MCPQG Meeting4.pdf
All of this agrees with my understanding of how EVSEs operate: The EVSE communicates to the car how much power it can provide and the car's onboard charger determines the rate at which it will charge. On a Tesla, you can select this. So far we are unaware of an ability to select lower rates on the Mach E.
This is why you don't have to worry about the output of a public L2 charger. You'll get the max your car can take or the EVSE can provide, whichever is lower.
This is also why you can't put a 48A EVSE on a 40A circuit unless you can tell either the EVSE or the car to limit their draw. While the car can communicate with the EVSE to find out the EVSE's max capability, the EVSE has no idea what the circuit breaker (or wiring) is capable of.