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You are correct. The ampere draw is the same...
But double the voltage.
Volts * Amps = Watts. Double the voltage is actually greater than double the charge rate though due to overhead and 240V being more efficient at being converted to pack Voltage.
So 6-20 charge should be around double the charging rate of a 5-20?
Actually a little more because charging has a fixed overhead of 3-400W or so:So 6-20 charge should be around double the charging rate of a 5-20?
As long as you don't run the cabin heater while the car is parked overnight to charge (who would do that?) it should be just fine. Last winter I had to charge my S on a mere household plug for a few weeks. It was well below freezing the whole time, car outdoors, not in a garage, and I didn't have a problem getting the expected 3 mph or so of charge. I think the 6-20 solution sounds just great.I think this is good info but just want to add a qualifier about cold temps. I am sure this works well most of the year most of the country but temp starts dropping below freezing and it is unlikely to work well. Not sure of M3 amperage draw for battery heating but tonight at 37f my S was pulling 15amps at 240volts just to warm the cabin when I sat down to run nav routes.
In the dead of winter 10f and lower with a 30amp outlet battery/interior warmup could consume a few miles.
I've been digging in studying and it really looks as simple as swapping the neutral for the other phase (black and white hot wires) which requires a new 240V gang breaker.
Total bill of materials should be under $20 and will allow 15 miles/hour of charging.
so you did'nt have to replace any wiring to panel? just buy breaker and socket?
so you did'nt have to replace any wiring to panel? just buy breaker and socket?
I looked at your video, but I would be interested to see also your breaker panel.What all is required to convert a NEMA 5-20 outlet to a 6-20?
I have a 5-20 in my garage (just discovered it under a wall plate....score!!!) that is in the perfect spot for my UMC.
Yes, it can be that easy if you have a 15a or 20a 120v circuit that has a single outlet on it (or can be rewired to have only one outlet). Unfortunately, that situation isn't very common. It mainly happens when an outlet was installed for a specific purpose like an AC or water heater.
This why I would be interested to see the picture of the main panel from theOP.Yes, it can be that easy if you have a 15a or 20a 120v circuit that has a single outlet on it (or can be rewired to have only one outlet).
Unfortunately, that situation isn't very common.
It mainly happens when an outlet was installed for a specific purpose like an AC or water heater.
This why I would be interested to see the picture of the main panel from theOP.
I noticed in few older built home, that there was a tandem 30 A for an oven range, several 15 A for the rooms, and two 20 A for the kitchen.
If the kitchen is not too far from the garage, you could easily share the two 20 A plugs (if they are not on the same phase)
using some extension cords and an automatic disconnect like used for making a Buddy Dryer.
I'm going through this now (a bit more work; I'm running dedicated 12 gauge from the panel). Did you just buy Tesla's 6-20 adapter from their site for the mobile charger?
12 gauge will work for 5-20 (120v-20A) but not for 6-20 (240v-20A).
You are going to be pulling twice as many watts, so go with thicker wire. At least 10 gauge.
12 gauge will work for 5-20 (120v-20A) but not for 6-20 (240v-20A).
You are going to be pulling twice as many watts, so go with thicker wire. At least 10 gauge.