At 14.4v it should be all right.. I believe that at that voltage pressure there should be no issues for a AGM battery. Wrcsixeight could verify can this for sure. One thing I know wrcsixeight will say is that these AGM batteries do actually "like" a higher charging rate. Which means you would be just fine in this case. I'd bet good money that your voltage would drop down rather quickly after a engine start up. Mine sure does.