Tried your method, but it is more fundamental than that. Their system simply refuses to send me any "juice". But their breaker doesn't trip.
Turn off everything then just my main AC line breaker and it illuminates, but it's just messing with me--if I turn off my inverter, the circuit goes dead...without tripping the dock breaker. The dock pylon has a meter installed, which self tests every couple minutes, but no flow, no meter movement.