new batteries for trailer

bbaley wrote:
I am going camping this weekend.

Can I upgrade to AGM batteries now,
and then after this trip look into whether I need to update charger/inverter to something better for charging them ?

Arguably the majority of owners here on the forum are running a WFCO converter in their trailer and probably none can honestly report that their WFCO ever delivers a proper 14.4 volt bulk charge to their battery (or batteries), ever. Instead the most we usually see is ~ 13.7 volts which is nowhere near acceptable for proper recharging of a deep cycle battery. One weekend certainly isn't going to kill your new AGMs but you would want to budget for replacing your converter that will in fact deliver a 14.4 volt bulk charge to the batteries. One exception to this I can think of are Trojan batteries which are spec'd by the manufacturer to require a 14.8 volt bulk charge which most converters are just not capable of. Progressive Dynamics does offer a model which is capable of this bulk charging voltage and would be a good match for a new set of Trojan batteries, flooded or AGM.