Thanks Kevin.
It’s a 240V, 32A input. 7.2kW draw that will be plugged into the 10kW continuous (30kW peak) inverter.
We only need to run it for 30-45 minutes and, ideally, still have the engine running to trickle the batteries - but this is now not a simple option as they need to be 24V for the feed and the bridge needs to break for charging. I have seen this:
https://www.yandina.com/troll2400info.htm as an option...
The generator option is a last resort as doesn’t fit well with the other equipment fitted - plus there’s a H&S issue with the weight and noise of a generator big enough.
All that said, it’s looking a lot like the generator may be the only real option... I was hoping someone was going to come up with a simple solution!