Paralleled Dual FX System generator inputs

I have my Outbacks set up in a parallel, master/slave configuration, which is what the image appears to be showing.

I believe you can set a pair up to do split phase, but there are issues with doing so. Unless you wire the panel for 240v split phase, you would have just one inverter supplying it, and the second one would really just be a battery charger. I assume you have no 240v loads?

If you do rewire the panel, you won't have a master/slave setup, each inverter would supply one side of the panel. With my setup, the master supplies the whole panel almost all the time, but the slave is available to handle the occasional large coincidence of loads. The slave can otherwise live in sleep mode, saving a lot of tare loss.

Can the generator be wired for 60a 120v output? The 15a 120v outlet on the generator is likely a convenience outlet for running lights or whatever. It doesn't necessarily mean the generator can't be wired for 60a 120v hardwired output. My 4kw Onan diesel can be wired for either 35a 120v or 17a 240v by changing a couple of connections in the control box. If so, you could get full charging capability of both inverters while still getting the benefits of the master/slave setup.