According to the datasheet of the AGM batteries the charging current without temperature compensation must be limited to 0.2C. When charging a 60Ah AGM with the smallest Orion Smart Tr 12/12-18 the chare current will be 18A or even higher at normal temperature. This corresponds with at least 0.3C. The system will be put in a relative small compartment so I expect that during charging the temperature will rise to 30-40 degrees. Because the Orion Smart does not support temperature compensation and adjustable charge current this seems a less optimal combination. Is there a better solution?
My current thougts are to use a MPPT charger and connect a 12-24V DC/DC converter to the PV input. The Smart MPPT has options for temperature compensation with an external sensor and adjustable charge current setting.
