I'm nearing the end of charging here and hoped my banks would be more in balance than this. As these are AGM cells that almost .2v difference is a big deal. I looked at the lights and only the green is on. I verified with a multi-meter as well. I also re-conected the wires in the order specified (I connected common first time around).
I'm well over the 27.3v threshold for when it should be on. If I recall, it needs a 50mv difference. I was dense enough to have Google do a mv to V conversion for me, if I'm figuring this right, I've got 160mv of variance here.