Eric, I'm not sure I'm following you.
My understanding is the Solera is kind of new, which means you have newer batteries. How much solar do you have on the roof, is the wiring appropriate, how many amps are you pulling in per day (you need one heck of a solar setup to recover from 30% SOC to full in one day), what is the voltage reading on the batteries several minutes after the charging has stopped and no power is being drawn from the batteries, you see where I'm going with this.
I'm not familiar with the Tracer MPPT controller and if it is capable of equalizing the batteries if they do need it. Your safest bet might be to pull them out and do it manually with a battery charger that has that option. Be careful, place the batteries in a well ventilated place on a piece of plywood or such to prevent acid to come in contact with concrete or stone, the batteries will become very warm and will gas off. Remove the caps, wear gloves and safety glasses when doing this. AGM batteries can not be equalized bec. they are sealed - or ventless. Before charging and before equalizing make sure to check the water level, one cause of batteries sulfating is that the water level is to low and the plates are being exposed.
Having said this, there could be many reasons you're having problems but starting over with a set of fully charged and equalized batteries is one of the better options. Monitoring your power usage is also part of the equation.
2013 RAM 3500 Dually Longhorn
2014 Trilogy 3650RL, W/D, Onan 5500, 8000# Axles, IS, 960 Watt Solar, 6x6 Volt Battery Bank, Freedom SW 3012 Inv/Charger