Existing two roof units are 13,000 BTU each, so I was looking at the 27,000 BTU but with three ceiling cassettes, I understand that just two leaves the front of the coach hot or cold, as the case may be. Solar array would be on the large side, I understand that. With the roof cleaned up due to losing the two roof units, maybe there’s enough real estate up there for four of those Kyocera 285 panels? I’m just knowledgable enough to get myself into trouble trying to force the issue, lol. Does sound doable if willing to forego A/C at night, should be bearable with dehumidification and blowers moving air.
Have you considered replacing your units with newer heat pumps? When we ordered our 5th wheel, we specified two 15k heat pumps. Only use propane when the temp drops below 35. And with the efficiency of the new units we spent 6 weeks in Florida last July and only needed to run one a/c unit.
I think you’ll find more problems trying to adapt the split units running off solar than the cost of new heat pump units running your generator.