Found the website below for a quick whole house load calculation. I know it isn't exact. Showing around 155 amp load with the 48 amp tesla wall charger. Thoughts?
Whole House Load Calculator
My calculation:
Load.pdf
Nice tool! I will have to check that out. Was driving today to a vacation spot (sadly without my M3 yet!!!) so slow to respond.
A couple quick notes without diving into it too deep:
1. The Tesla load needs to be calculated as a continuous load, so unless the tool has a way to set it as such, you would need to count it as 14,400va.
2. Looks like you are at least missing one of your furnace supply fans (not a big deal - though I question their estimate of 300 watts - that seems quite low by my experience watching my "sense" with my furnace fan)
3. Because you have your Fridge and Washing Machine and Dryer on dedicated circuits, those may drive up your count of "small appliance circuits" (this is not an area of code I have read into much yet but I have seen some discussions online). You also have the outdoor kitchen which might be counted as small appliance circuits (though I would argue that the indoor and outdoor kitchens could be considered non-coincident loads since I doubt you use both at the same time).
4. This is where I am way beyond my current depth, but my guess is that you can't lump the Tesla in with regular house loads which then get "demand factor" reduced by 60% (to 40% of calculated) since they figure you will never use EVERYTHING in your house. The Tesla WILL be used for many hours so I suspect it does not get to be demand factor reduced. I will try to research this.
At the end of the day, I suspect you are going to be fine. It will just be pretty close. There is an interesting rule on the books that after all this calculation and derating, there is another rule that allows the service feed into the building to use conductors 83% of what the tables say you need. I have no idea how or why they came up with 83%, but it basically means that the feeds to everyones house can't really support the full 200 amps (or 100 or 400) that it is calculated at. The NEC is weird sometimes (I am wondering if this going to bite people now that folks are adding electric cars and actually more heavily loading their electrical services).
Also, any desire to future-proof your install (like if you got a model X or S) and do something larger than a 60a circuit? I just did the 60a circuit, but figured I would ask... Though since you are somewhat close on the whole house load, perhaps 60a is the safest.
If you have a few and could answer some of the questions in my previous post (and/or do some pics) that would be convenient!