I have a new (3 weeks old) installation with a MPPT RS 450/100 (firmware v1.09) and (2) serial strings of (8) 415W panels, 10.3A (Impp), 48.2V (Voc) that are intermittent turning off charging on both trackers during bulk and absorption multiple times a day. There are no errors. I'm driving to the maximum of 5760W but want the extra headroom for winter months. Everything is working great otherwise. Is this expected behavior or does my unit have a problem?