Your best option is to get a 36 volt minn Kota with I-pilot. Put the waves at your stern and the motor doesn’t have to run as hard. Most boats get 12-20 hours on a charge that way. I get 6 hours on my 70lb / 24v without an issue. Maybe longer but I haven’t been out longer than that. You will take waves over the stern at times, but something I am comfortable with.
the i-pilot also allows you to steer the boat to gps or navigational north, so you can fish so much easier. The only negative is going slow when the waves are pushing you too fast. I can get 1.5-1.7 mph with a 10+ mph wind and waves, which is too fast for harnesses. So I have to go about 30-45 degrees off the back of the stern to slow down.
i would never consider a kicker unless you plan on fishing salmon at much higher speeds.