@Brian99 It is technically split phase 220/110 V. Two 110 V hot lines 180 degrees out of phase - so 110 V from hot to neutral and 220 from hot to hot - very common in North America.

@Brian99

I have 220 V coming into the house and it is split at the electrical panel into two 110 V services as well as having the ability to use 220 V. I have used the AV2000 on one side (110 V) and it works...