I have a customer approach me about setting up the electrical for a large heat pump system. Just got the list from the environmental company showing loads, total of all loads are 214 amps if all loads are cumulative, I dont know if that is how its calculated. If it is, that is a lot on an already overloaded system just based on number of fully loaded panels. Main service is only 200A from meter, main panel plus 3 sub panels, (2 - 100A and 1 - 60A). Are loads from heat pumps cumulative? And will this overload the service?