The 7355 in our 2003 trailer still works just fine. It's 13.8v is good for a Float voltage except in hot weather. If hot out, just add water to the batts more often. No big deal.
If you want automatic temperature compensated Floating, you need a different sort of maintenance charger.
If you are off grid and want a fast recharge to keep generator time to a minimum, the 7355 won't do. You need a charger that will do over 14v ( 14.8v is best). I have a separate charger for that job, and use the 7355 for leaving the trailer plugged in at home.