FAQ: Charging modes for the MPPT Tracer series

Question: Which battery type setting should be used for the LiFePO4 cells/batteries with the MPPT Tracer Solar Charge controllers?

Answer: The voltage levels are shown at the table. Changing the battery type will change the maximal voltage level between 14.2V, 14.6V and 14.8V.  All of these levels are pretty OK for the LiFePO4 cells.

Note: check the details on the why to avoid keeping the battery at full charge voltage level.

Additional note: please keep in mind that the voltage levels for the MPPT chargers (Tracer series) are at 25*C nominal. With the temperature decreasing, the voltage levels will increase as indicated in the manual: -30mV/*C. This means that for temperature 15*C (of the MPPT temperature sensor) the voltage levels will increase by +0.3V

Summary: for cold temperatures (15*C and less) you may wish to have the setting for GEL and/or SEALED  battery to stay bellow the safe charge voltage of 14.6V per battery.