Deployment is designed to be done by a single operator with no electrical qualification, the system is pre-configured, and setup is mechanical rather than electrical. That said, three roles need different levels of familiarity, and pretending otherwise is how units get damaged or deployed badly:
Deployment and basic operation, position, level, unfold, energise, connect load. A short induction is sufficient, and it should cover the towing and site-selection decisions as much as the switching.
Fault response, reading alarms, distinguishing a battery event from an inverter event from a generator event, knowing what can be reset on site and what needs support. This is where training pays for itself, because it is the difference between a phone call and a recovery trip.
Maintenance, the scheduled activities above.
Structured training is available across these levels, remotely or on site, and can be built into a supply agreement. For a fleet asset, we would recommend it: the units are simple to operate but they are not intuitive to diagnose, and the crew who deploys it in an emergency is often not the crew who was there at handover.