You have to check the specs on any alternator charger you buy with the output specs for your specific motor. What I ran into with a MinnKota charger was it takes 25A output from the motor to trigger it into charge mode and my Etec only puts out 25A and that isn't until a specific RPM is reached. All the time I thought I was keeping my batteries topped off it wasn't doing zip. I'm not saying that all combinations are like that, but you have to do your homework.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2018 Robalo R180 CC, Yamaha 115
Bitter Gun Owner