Solar/Inverter upgrade

[Boondockboomer]

I think the first thing we need is year and model of your RV. If it’s set up like mine I have attached some pics. 3000 watt is hefty and would require multiple lipo batteries. 3 at least. You should have on top a solar input if your rv is relatively new with the wiring down to the front storage inside the panel.
Your going to need a mppt between panels and battery.
Now to your question, yes you can power AC.
I would reach out to Daryles in the post below. He’s extremely knowledgeable.
https://www.montanaowners.com/forums...ad.php?t=86273

[Superchief05]

Thank You Boondockboomer. I guess my model did not come through in my signature. It is a2021 MHC 372RD. I have located the solar and inverter prep locations (both in front storage). I am just wondering how to connect the inverter. The wire appears to be a 10/2 Romex, and I believe it only powers the 5 outlets wired for solar.

[Boondockboomer]

The inverter resides in your basement storage becuase it needs separation from your batteries and other fuses. You should have a 150 amp fuse that your red cable would connect to. So from inverter, red cable through wall to front area where battery resides connected battery disconnect then to 150 amp. Then red cable from bottom of 150 amp to battery post. Black cable connected to inverter ran through the wall with a direct connect to battery.
Is this what you wanted.
As far as AC running off the inverter, you would split AC power that goes to shore and fuse box off with a feed to inverter outlet with a fuse in the middle.