solar charger goes onto float when sees lead battery voltage


  • i have a pair of 100a aolithium batteries connected correctly, i now understand there is a lead battery ( the one with + connected ) this discharges more than 2nd battery ( the one with - connected ) , solar charging with victron charger and when 1 battery hits float voltage 13.2v it goes to float meaning 2nd battery doesnt get charge , if i raise float to 16v 2nd battery gets charge is this safe to do ??? 

     

    i need to check if same happens on victron mains charger 



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