Split system ac install

Don't know generator you plan to run but most generators have 120 or 230 volt. You have to flip switch.
9000 btu is more then enough. I was sitting my 34 in Phoenix yesterday. Over 100 F and was sleeping under blanket after all night driving.
Some truck stops still provide shore power so you can plug in with extension cord. I'm not sure they have 230v.

 

We were stuck in south Florida last year to repair hurricane damage to a rental property. Our Volvo 780 has a 9000 btu split system that worked extremely well. Being able to plug the 110v into the GFCI outlet for an entire month was nice, too.

 

I installed a 9000 BTU split in my FLD120. I ran it with my Honda EU2000i, and it did just fine. I upgraded to a Champion 3100 watt inverter generator for the remote electric start. Just as quiet as the Honda, but I need to see about getting a larger capacity fuel tank for it.

The Champion puts out near pure sine wave power, so no need to clean it up.

 

I think you would have to convert it to 12v before running it into an inverter. If it detects shore power, it likely bypasses the inverter altogether. My generator and inverter are both pure sine wave, but I don't use the on board shore power system. I have an extension cord that has 2 male ends, one stays plugged into the breaker outlet, the other plugs into the inverter or the generator. I made the mistake one time of plugging the generator into the inverter on accident, and it fried my inverter.

 

Usually hi end pure sine inverter-charger has programmable transfer switch. You can program what happens when one of each power sources is on.
In my opinion it's expensive and too risky to catch fire. You now all this electronics made in China.
I have my generator hooked to AC and power outlets in cab. I have to replug my refrigerator manully once before sleep.

 

I've got the same Champion model as @windsmith is using. 3100 pure sine wave with the remote start option. They're not kidding about the fuel tank being entirely too small on it.