I'm planning on installing a load shedding EVSE (Wallbox Pulsar Plus 40A paired with their Power Meter for Energy Management Solutions). After a failed attempt to clamp the service line I plan on installing the CT clamps on parts of the load.
My service is 100A. My service panel is 125A. See pictures here. In the same panel I will have the following breakers/load:
|40A||32A||SolarEdge SE7600H-US inverter with max continuous output current 32A|
|50A||40A (load shed)||Wallbox Pulsar Plus 40A|
|30A||19A||heat pump HVAC label|
|15A||4A||air handler label|
|15A||<1A||Power Meter for Energy Management Solutions|
|15A (the only single pole)||<12A||driveway plugs, security cameras and lights|
I'm planning on installing the CT clamps around the subpanel and EVSE wires making sure the same phase wires are clamped together.
The load shedding EVSE allows setting the max current its meter sees. What's a safe value when it only sees part of the load? Busbar rating minus max values of all the non clamped loads? Should I be subtracting the full solar? Does the solar 120% rule NEC 705.12(B)(3) point 4 matter here? Should I be subtracting the theoretical max of the 110V/15A circuit?
The safest value is probably: 125 (busbar) - 32 (solar) - 19 (HVAC) - 4 (air handler) - 1 (power meter) - 12 (110V/15A circuit) = 57A
Is this right? If I pigtail the HVAC and the 110V circuit to allow me to clamp those wires too, I could set the max current to 57 + 19 + 12 = 88A?