A Xantrex charger is no better than any other good quality three stage AGM charger. I use an IOTA DLS75 to charge two submarines batteries, which have the power output equivalent of 10 Odyssey 1700s. My system is completely isolated from the boat's electrical system, so I can only recharge by plugging in. I can get about 14-16 hours of playtime at moderate to not so moderate listening levels.
Ditto...I blew up two Xantrex 40's...they suck...had to switch to Cascade/Iota 90 in my last boat....Xantrex could not take a charge from a honda generator...eu2000....Cascade/Iota never had an issue.
SWBob...how much do those batts weigh?