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Waiting for model 3 - what should I do to be planning for charger

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There is no reason to wait. With that said, the advantage you do have right now is the ability to shop around. I was able to find new wall connectors on ebay for about half of what Tesla was asking for them a few months ago. The units were brand new and they were actually drop shipped directly from Tesla to me. You can also do what I did for a long time with my Model S: use a second hand mobile connector plugged into the appropriate sized 240V outlet. I picked up a nice next to new unit for a fraction of what either a new mobile connector kit or a wall unit costs and when I switched over to wall units, I was able to resell the mobile unit for more than what I paid for it.
 
Do it now. I waited until I got the car and then was in a hard place because I couldn't travel that far because I could only charge back like 50 miles a day. Now that I have the wall connector I don't worry about going anywhere as it's fully charged every morning. If you don't want the wall connector install the nema 14-50
 
HI

As I patiently and anxiously await my model 3 (order placed night of election!) - what should I be doing re home charger? Do I wait till I get a delivery date or should I act now?

You need 1st calculate your electricity load, if you have range/oven, dryer and air con, you probably need an 200amp panel for adding a charger. Looking your panel's main breaker to determine if it is 200amp or 100amp. Panel upgrade will cost you 3500 to 4500. That will be a steep..
 
Sorry, I'm not an expert here but we only have a 100amp panel at our house. The workaround was a controller of some sort (I don't know what it's called, but electricians do) that cost about $850. What it does is prioritize the electrical load inside the house over the load outside of the house- so if you are running your dryer/oven it will cut the power to the wall connector so that the breakers don't blow. It is a lot cheaper than upgrading the service to your house and is pretty simple/well established technology.