Hi. Came across this group by chance. I have Kodak 7.2 inverter for about 2 years now & used to change settings everyday to benefit from solar during the day & preserve battery at night for loadshedding & power failures. Used to only use maximum solar on SBU setting which I used to change to SUB late in afternoon until next morning when back to SBU.
Stumbled across battery charge setting which resolved issue. Now I have output setting permanently on SUB & battery charging source priority as "Solar First". Not sure about the voltages, etc but above sorted out so now I don't change settings at all. During the day, it uses solar first (to whatever maximum available & required), then grid, then battery.
Hope the above assists.