Quickstart88
Member
Wow @Quickstart88 you have a zinsco main panel ? There are a lot of documented issues with those and FPE panels
Don't jinx me. But thanks for the warning.
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Wow @Quickstart88 you have a zinsco main panel ? There are a lot of documented issues with those and FPE panels
A 100 amp panel is really small. However, you can put in the 50 amp and set the car to charge at 32 or 33 amps. Because you'll likely be charging the car at night, the only other appliance that will be running during that time is the A/C.Ha ha I was just chatting with my electrician. He said I am over reacting. #6 wire is fine with 50 amp breaker. He also ask if I really want to switch out the 40 to 50 amps in doing so - that's is taking 1/2 of my total home amps. My breaker panel is only 100 amps. Do I really want that?
Ha ha I was just chatting with my electrician. He said I am over reacting. #6 wire is fine with 50 amp breaker. He also ask if I really want to switch out the 40 to 50 amps in doing so - that's is taking 1/2 of my total home amps. My breaker panel is only 100 amps. Do I really want that?
If I upgrade to 50 amps, using my mobile 2nd gen UMC, it can do a top 32A charge rate. Correct?
The real benefit if having the 50 amps is if I decide to add the power wall charger. What charge rate will I be getting using a pw wall charger with a 50 amps. Trying to find out the benefit of buying a power wall charger.
Well the fact that you only have a 100 amp main service is new data. You need to run a load calculation to figure out how subscribed your existing service is. It is possible you are already overloaded! Most houses these days have a 200a service.
Note that the actual rating of circuit breakers and the ampacity of the wire has nothing to do with the load calculation process. You calculate loads based on their nameplate ratings. So a 32a UMC Gen 2 on a 40a or on a 50a circuit is no different from a practical or a calculation standpoint.
So the benefit of a wall charger:
I always want to keep my UMC in my car for emergencies and the unexpected. And I am too lazy to plug in/out the UMC from a wall socket every day (also it can wear down the receptacle pins and it has some danger since the plug is hot when doing it). That meant I wanted a dedicated charger at home. So either a second UMC or a Wall Connector. I went with the wall connector since in my case it let me charge at the full rated 48 amps of the car. I put it on a 60a circuit (but you can put it on up to a 100a circuit).
I personally think the Wall Charger is the best option for at home since you can change a rotary setting dial inside the unit to control exactly how many amps it will let the car use. I see this as especially useful when you have smaller electrical services (like you do) since you can dial in the max amount your service is calculated to be able to handle.
Note that the car gives you even more granularity, but you can't trust the car from a NEC standpoint. My reading is that the dial in the Wall Connector counts as far as NEC goes, but the settings in the car rely on laymen humans and so they don't count. Also, the software has been known to reset itself and try to draw the max offered by a UMC or Wall Connector from time to time...
A Wall Connector is only $500 when a second UMC is $300. It was an easy call for me.
P.S. On 6 AWG Copper in conduit you can support a 60 amp breaker. Though as you have pointed out, your electrical service probably can't handle that much power. Though I see nothing wrong with putting in bigger wire and breakers, and just setting the dial on the Wall Connector down to an appropriate setting so you don't overload your main electrical service. One benefit of that is that you could later upgrade the main panel/service and you would be all ready to turn up the juice on the Wall Connector without re-wiring. Just food for thought...
Is it ok to leave the wall charger plugged into the 14-50 outlet when not plugged into Tesla?
Of course. That’s what tens of thousands of Tesla owners have done for many years. The M in UMC is a capability, not a requirement.Is it ok to leave the wall charger plugged into the 14-50 outlet when not plugged into Tesla?