Need new power converter?

Boon Docker wrote:
Short answer, your converter will do just fine with two group 31 batteries. And yes, you assume correctly, the power converter is a battery charger.

"Fine" is relative - if the OP's trailer is equipped with a ubiquitous WFCO 8900 series converter chances are it will never go into bulk charging mode even though it is rated to do so @ 14.4 volts. I've owned several, including the 8955 in my current Coachmen, and I've never seen any of them actually go into bulk mode regardless of the battery SOC. With a substantial investment in dual G31s the OP may well want to switch out his converter to another than will correctly maintain them. ;)

ON EDIT:

I'm in a situation similar to the OP's ... I have a single G27 Interstate that's now 8 yrs old and although it still takes a full charge it's coming time to replace it. Since I added a 1000 watt PSW inverter to the trailer last year to power a few select 120 vac devices (hair dryer, toaster, coffee machine, fans, etc) at times when we may lose campsite power upgrading to a pair of batteries seems like the logical choice. However, the problem then is investing so much in a pair of batteries when the converter I own isn't capable of properly maintaining them. At the moment I'm reorganizing the trailer's A frame and have decided for the interim to just stick with my current G27 as I'm not prepared to sink so much into a new pair of batteries when I know my current WFCO converter is so inadequate.