Thanks guys, I was wrong about that! An SiO2 is a "modified AGM" is one way to look at it. I forgot that AGMs also require at least 20% charging rates in the Bulk Stage. At 27 amp max amps, that means Bulk will end at about 75% SOC. (it ends about 10% SOC higher with SiO2 according to my testing)
So to do an AGM right, you need your 27 amps/100AH to be at least a 20% charging rate when starting at below 75% SOC. That needs to get the batt to the proper spec 14.x Vabs for that AGM.
So it is the same with solar for AGMs trying to meet the AGM specs as it is with SiO2.