For over a year I plugged my MH into 120V 20Amp circuit. Ran the AC on that system but don't try to run a vacuum cleaner or anything else while running the AC. The AC will draw less than 20 Amp and should not be a problem.
I used the Dog Bone converter cord:
I used that one plus one that went from 30 to 50 amp. Presently using that configuration at the storage facility. Plug it in, leave it, batteries stay charged.
Also, in my case, I need to know if there is a power outage at the storage facility. I use:
Power Failure Alert
plugged into a receptacle that looses power when there is a power outage.
For my batteries to stay charged the inverter has to be on so when there is a power outage the inverter kicks in and keeps things running. I plug an old android phone and charger plugged into the inverter circuit and access to VISIBLE for a provider.
Power failure and I get notified by Texas and Email.
Just thought I'd through that in as a ramble.