Not sure if this is what your asking,
I called Aims about the 240V inverters and was told they are for 240V, (220V).
Anyway you can't just split the legs like the grid and have 2 120V legs for normal stuff and the 220/240 for wells or dryers. I was thinking about doing just that since I need 220V for my deepwell, 120v for everything else.
Not sure what I will do now myself, probably buy just a 220/240 inverter for the well only. Maybe wire a switch to it so the inverter is off untill water presure drops to 32PSI, turn on the inverter at that so it's ready, then the well set to turn on pump at 30PSI. Just so the inverter does not have to turn on under load of a dead motor.
Or I may just use a 220V generator and pump 200gals to an above ground tank then a 12Vdc pump from that or 110Vac pump on the normal inverter.
Transformers have losses and kinda expensive to get the high amp ones too.