Why have I dealt with this charger for 13 years?

First check to see if your Iota has the jack fitting. Some Jaycos back then did not have the Iota with that fitting. If yours does, just get an IQ4 and plug it in.

If no idea what that is all about, read the Iota website.

If no jack fitting, you can replace the converter with one that does 14.x for a time before dropping to 13.6

A 2000w gen will run a 55 amp converter at 14.x, so stick with 55 or less. Might run a 60.