Can I run 3 AIO inverters in parallel, with only 2 receiving PV?

[SenileOldGit]

I have two 6kW PV strings, and two 5kW inverters running in parallel, and I was thinking about buying a third inverter to run in parallel, to a) reduce the total load on each inverter, and b) allow me to use over 10kW at one time in the house if I need to.
I don't want to have to dig up my patio again to lay a third armoured cable for a third string - so my question is, can I run three all in one inverters (MPP Solar PIP5048MKX) in parallel, with only two having PV input?

 

[sunshine_eggo]

Yes.

 

[SenileOldGit]

Thanks, I thought that would be the case, because you could have a two inverter system with one string each, and one string might be getting next to no power because it was on the opposite side of a roof.