Quote from: sunnymike on September 18, 2024, 11:18:51 AMThanks for the reply,
The batteries shutdown without any load on the output of the converter.
I have leads from the neg. and pos output on each battery. I then connect both neg leads to the common lug on the convertor and both pos leads to the pos lug on the converter. It doesn't matter if I connect one or both batteries, they shut down in both cases.
I am a little surprised that the 3 little connectors go nowhere. There are 3 little pins in those spots on the connector. I was betting they were for that 3 button switch on the handlebar that turns the power on, selects the PAS setting and other switching functions. Oh, well. That's why I am asking you for help because guessing just gets me into a lot of trouble.
You may be getting a current spike into the converter even if the converter is not connected to a load. Hard to determine without an oscilloscope.
Connecting batteries in parallel as you described is problematic if the batteries are not at the same charge voltage. The batteries can be charged through the load connection, as happens with a regen bike. If the voltages are different, you're going to get current flow from one battery to the next which, depending on the difference, could be a sizable current. You should be using a Datex2 or similar device.
Do you have any specs on the current draw of the converter and of the trolling motor? Or at least pounds of thrust specs? You may be asking too much of the bike batteries. With inefficiency of the converter I suspect that you're not going to get a lot of run time with the bike batteries. I need some info on the converter and trolling motor.