It seems to me that Load Calculations for sizing electrical panels are very conservative. I did a quick calculation for my home as it is today and came up with a load calculation of 213 Amps. Over my 200 Amp service. Oops.
I do have a smart meter and it shows a maximum load of 18.721 kW which at 240 volts works out to be 78 amps. A whole lot lower than 213 for sure. That's quite a big difference from the calculated load.
My Daughter has 100 amp service and judging by Load Calculations adding a 14-50 with 40 amp beaker would require a panel upgrade. Her home calculates at 95 amps load as it stands today. Comparing her home to mine I have many more loads than she does (I have two EVSE's for two EV's) but I would (theoretically) be fine with 100 amp service if my peak is 78 amps right? . Is it possible to measure actual load to establish safety of adding an EVSE to a 100amp panel, she doesn't have a smart meter with max load like ours. Or will codes always require a theoretical load calculation vs demonstrated load?
I do have a smart meter and it shows a maximum load of 18.721 kW which at 240 volts works out to be 78 amps. A whole lot lower than 213 for sure. That's quite a big difference from the calculated load.
My Daughter has 100 amp service and judging by Load Calculations adding a 14-50 with 40 amp beaker would require a panel upgrade. Her home calculates at 95 amps load as it stands today. Comparing her home to mine I have many more loads than she does (I have two EVSE's for two EV's) but I would (theoretically) be fine with 100 amp service if my peak is 78 amps right? . Is it possible to measure actual load to establish safety of adding an EVSE to a 100amp panel, she doesn't have a smart meter with max load like ours. Or will codes always require a theoretical load calculation vs demonstrated load?