Ok so I built a 2p4s battery out of a old ES cells to overvolt a razor type scooter with a seat. It has a 16” 350 watt hub motor and I’m using a 36-48v controller.
I am using a M365 battery for the primary and made a splitter cable to hook both batteries into the controller.
So getting to my problem.... everything works fine when I just run the primary battery, voltage gauge reads 38.6. But once I connect the little battery I get nothing. Voltage gauge turns off and no power. Remove small battery and plug the primary battery in and everything works again.
Possible reasons for this:
1. The controller can’t handle over 52.3 volts ( seems very unlikely as it’s rated at 36-48v)
2. The controller thinks it should be operated at the 36v range and shuts down because the higher voltage.
3. Something wrong with my battery configuration. I know I can’t charge the little battery at the same time because it’s a different configuration.
Any ideas gang ?