This whole business of how to apply EV charging equipment to service calcs seems to be an issue and the NEC is not very clear on this. And since most of these are being installed in existing homes this further complicates things. Also, I'm staring to see situations where 1 level 2 charger is not an issue from a practical standpoint in most cases if it is an 200 existing service. But now the customer says let's add a second charger, now we need to get serious about calcs and I'm not sure the code is giving clear enough requirements for this.
In my case I'm doing a service upgrade due to an addition/renovation and thinking of making provisions in capacity for 2 level 2 chargers for future use. Depending on the calc method in my case it could mean a 200 amp service or something above 200 which my POCO will penalize me greatly for.
