Originally Posted by ADChevy4x4
OP says the apartment shares a panel with the shop and the apt has about 7 circuits..So you would need 7 measuring devices to capture the total load/wattage...If the apt had it's own panel it would be no problem.
and each measurement device is $150.
so it's just cheaper to do it right and put the apartment on a sub panel with a meter base.
do try and keep up.