I completely agree with you, Darin.
The only decent way to upgrade pack voltage is if the new one will fit within the controller and dc/dc converter specs you already have.
For example, I was able to easily upgrade the motorcycle from 36 to 48 volts because I was using a 24-48V controller and a 36-72V Dc/DC converter.
The only thing I had to do was add one more battery and change a setting on the controller.
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