I was more thinking of 30A plus charging, because that is what most 200km plus range cars really need. Without having to really go crazy every time you get home, rushing to plug-in.
People forget that the amps listing on their electrical panels is at 240V as well - even a 100A panel can supply 200A@120V since there's two hots coming into your house, both at 100A each. A 200A panel can supply 400A@ 120V. So, even a 60A draw at 240V (two Bolts in the driveway for example) still leaves 40A@240V, or 80A at 120V.
And on a 100 amp service, the remaining 70 A is more than enough, again, ruling out things like relying on baseboard electric heat in the middle of February or something. The average house with a forced air furnace generally uses As little as a few hundred watts at rest (Mine is showing 490 W at this exact moment) To an "average" (Say, cooking dinner, stove, kettle, etc) of 25-45A) and under extreme circumstances (say, electric dryer as well as stove going at the same time), maybe 60-70A for short periods.
Again, most people drastically overestimate how many amps their house is using. Even during a peak dinnertime period this time of year I'm lucky to see our wattmeter creep up to 8KW (oven going, a few burners on the stove, furnace running, kids doing their thing, and the Volt charging) which on a240V feed is only a mere 33 amps. Only once ever have I see it surpass 10KW (10.5KW), and again, that was in my earlier example in the summer, and 10.5KW @ 240V is only 43A on the panel.
Yes, your amps limit is worthy of consideration (especially if you have a 100A service and have a major 240V draw like a hot tub that can draw 50-60A on it's own), but again, we're getting into theoretical situations that most people don't apply to.
In general, even a 100A service will do for the meantime.
