How many amps does a 3 bank battery charger that charges at 10 amps per bank?

A 3-bank battery charger that charges at 10 amps per bank will output a total of 30 amps when all three banks are charging simultaneously (10 amps per bank multiplied by 3 banks). However, the actual current drawn from the power source may vary based on factors like battery state of charge and charger efficiency. If only one or two banks are charging, the total current will be 10 or 20 amps, respectively.