All I can say is that mine caught on fire, after being run for around an hour in a situation where it was charging at over 70 amps. The repair center took it apart and ordered a replacement.
I have confirmed that the cooling fans shuts down when there is no 120 volt power source, be that inverter, or shore power, even when the inverter is still connected to the battery bank.
The manual can say what ever it likes. Real life trumps the manual every time.
It is possible they have redesigned the circuit--but my warranty replacement does not run the cooling fans without a source of 120 volt power.
