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New to the solar game. Added a Smartsolar 100/20 48v unit to my toy hauler. It has a two 6v batteries wired in series (trailer has a 12v system). I am curious if I need to adjust the voltage thresholds for the charger, since voltage characteristics are different in a 2x6 series versus a 2x12 parallel system. Has anyone encountered this type of setup? What did you end up doing?
The voltage characteristics are more dependent on the chemistry and construction of the battery than on whether you have 2x6V series or 2 x 12V parallel. Check the manufacturer's data for the operating voltages for the 6V batteries and double them. The MPPT can then be configured to these voltages.
