Parking mode power consumption.

[Billybaldin]

Ok so I know nothing of charging or power. So I need to power the parking mode on the 3 channel A139 by plugging the 12v adapter into a portable battery powered generator. For all three channels and if I had it on the setting that used the most power. Would 150 watt generator be enough? And how big would that battery have to be to keep it running for like 10 hours?
Thank you