Electrical 320 mks

just brought it home, has 2 ACs and requires 50 amp service…i dont have 50 amp shore power installed yet and i need to keep the battery charged, and want to be able to use lights, and leveling system, and maybe the refrig briefly for pre-trip cooling/loading…Can I use a 110 20 amp receptacle and a adapter to fit the 30 amp plug/cord for this temporarily? I am not running ACs or anything heavy. advice?

Mine has been connected to 120 thru an adapter, since I put it in my storage unit, about 6 months ago, and it keeps the battery fully charged and I can use the refrigerator just fine, all lights will work because all are running off your battery.