I have been having a discussion for a week or so in regards to how many batteries can be installed in the new 2017 Eagle TT's, which includes the 338RETS, 320RLTS, 333BHOK, and the one we ordered, the 330RSTS.
During that research into "real world" runtimes, as well as discussions with both the salesman and the Jayco rep, the consensus was that we would need at least 2 group 27 12v's to get close to the 6-8 hour runtimes we wanted for the occasional Wal-Mart overnighter, in the event of a TV breakdown, etc. Our plans do NOT include any boon docking for more than that and if they did, I would take our two Honda's along. Even the Jayco rep said that when they qualified/tested the setup at Jayco, they used 2 batteries although he didn't say what size/type.
Anyway, before we heard back from Jayco with a definitive answer to our questions, the dealership received another 330RSTS they had ordered and the salesman ran out to see what the battery tray looked like. He was shocked as were the Jayco rep, and now me at what he found. Guess the tray on that unit was only big enough for "1 BATTERY", period! Now, this particular unit did come with the 12 cu. ft. gas/elec reefer, but unless Jayco is specifically adding a second battery tray somewhere (my salesman said he couldn't see a place where they could) when a unit is ordered with the residential refrigerator, there is no "stock" way to install more than 1.
Our salesman has a call into the Eagle TT product manager about this, but if we are truly stuck with 1, then we may have to seriously consider changing our order to the 12 cu. ft. reefer. We waited 6 months to place our order specifically because the DW wanted the residential refrigerator so I truly hope there is a way to install at least 2. Otherwise, for as long as we own this trailer, I will never hear the end of it!!!!
The only other "workaround" I can think of at the moment is to construct a tray in the front pass thru and use AGM batteries instead of flooded. But then that will take away from the already limited "underneath" storage capacity. We are going to the dealership tomorrow to take a look at the unit they just got in to do some other measuring before ours gets here and will see if they have any further information. But in my opinion, Jayco seems to have seriously dropped the ball with this new model design choice.