I imagine this varies tremendously between countries, and even here in Canada between provinces and cities but I thought I would share this as I know there will be helpful input. I have a 150 amp service. All heating in the house is gas but I do have a hot tub, AC, in floor heating, electric stove, and cook top, electric dryer and the usual lighting and electrical appliances. I bought an HPWC for the house. I did some tests to seem how high the draw might go and I managed to hit 110 amps with most of the major items turned on. Realistically when I'm charging we won't be running ovens or cook tops so I'm probably safe to charge at night up to a reasonable high level of current flow. That being said, I felt that having a 200 amp service would make more sense particularly as this might not be the last electric car I buy and I don't really want to have to have to bring out a calculator prior to turning on appliances in the future. My electrician determined that the cable to the house was not sufficient to allow more than 150 amps so I asked the electrical provider Enmax to provide a quote to increase the service. What they ultimately told me was that for a previous customer they had to dig up two driveways to put in a new cable and it cost $50,000. For our house we would need 4 driveways dug up so by extrapolation this would probably cost $100,000. Not exactly scientific but it seems ludicrous to me that essentially I'm stuck with whatever service was provisioned for the original house. If I had a spare 100,000 to throw around I'd buy another Tesla (though I probably couldn't charge it ). I have no idea how these cables are run but the implication is that each service is a separate cable from the nearest transformer and that they more or less run in the shortest possible route. Does this sounds normal or reasonable? I'm told that I'm probably lucky to have 150 amp service as apparently many residences are likely to be 100A. I guess this is mostly just an issue for heavy charging with the HPWC but it does seem that increased usage of electricity could have some barriers. I'm going to look at Solar but I presume this won't help me with the service size unless I setup my car to use stored solar power off grid.