Salvo, I don't know if solar is different somehow, but what happened to the preference for higher absorption voltages in the 14.8 area?
I know some converters drop voltage after absorption or four hours whichever is sooner, but this should more like at 97% SOC? At over 80% till 97% you still want the 14.8 AFAIK.
Also whatever amps is produced is shared among all the batteries so the threat of overcharging is much diluted anyway?
We had a link to a paper not long ago ISTR on how charging efficiency drops right off after battery passes 80% so that is just a normal part of doing business AFAIK.
If you lowered the absorption voltage so soon at 80% instead of at 97% IMO all you would do is take too long to get the recharge done and run out of sunlight. How would you ever get them fully charged?