Many newer modules have higher operating current than older designs, and large roofs may include several array orientations. Three MPPTs with up to 42A per tracker allow the PV field to be divided into separate operating groups while accommodating higher-current strings. The solar hybrid inverter supports a 2+2+2 string arrangement and PV input up to 22.4kW, 25.6kW or 28.8kW depending on model. String voltage and current must still be checked against each MPPT rather than only against total array wattage.
