Peterbilt SmartAir system

does anyone how the size of the AGM battery that the SmartAir system uses, believe I need to replace the batteries as system only works for 10 minutes and completely drains the Aux batteries to 0. by looks of batteries probably original from factory. it's a 2017 pete 579..

 

I just figured you had to use AGM for that system, if not yeah I can do Marine Batteries or any other type of battery that will work, would also like to run my inverter off them.

 

yeah wasn't sure about normal starting batteries even though the main batts are 950CCA.. the only thing I do know is the group size is 31 for the agm

 

that's strange most of the shops I have been to have always said these AGM's that peterbilt uses are really good but then if these are original there from a 17 pete 579 so 4-5 years old now.

 

looked those up and dam your right those are crazy prices, I called my peterbilt shop and they have 20 that have been on order for over a month and still haven't got them in short supply but they did have so Marine AGM style with same specs as factory that have both side and top posts on them and they have been using them with no issues. and priced 303.99 so going to go with them.

 

well the new batteries they got me were Blue Optimum brand marine dual purpose AGM 's and yeah the ones I took out were the Odyssey xtreme# 31-PC2150, the specs aren't exactly the same 900CCA compared to 1125 and reserve capacity on the new ones are 155 compared to 205. but should still be enough power to run it, atleast the pete store said they would be good... and new ones are 75amp hours compared to 100