This will certainly depend on location. The Fiat 500e is extremely uncommon in Canada, so salvaged batteries from them are probably not readily available or cheap.Listed from cheapest to most expensive batteries from salvaged production cars:
If the controller can go up in voltage you will get more power and possibly more range. Just check your equipment for max voltage. Nissan Leaf packs are easy. Some hybrid packs are around 144vdc and that would make things easy if your controller can except that voltage. So many variables. Good luck.Cool forum. Just picked up 1991 Geo Metro already converted to electric. Needs batteries. Wondering what batteries to use. It had 10 12volt 100ah led acid batteries. Any suggestions? 120 volt system.
Any controller accepts battery voltage up to the controller's limit and puts out to the motor only the voltage required to push the requested current. It is good if the controller can be programmed with a motor voltage limit, if the battery's fully charged voltage and motor's limit don't match.A Zilla controller can be adjusted to accept high voltage and put out a voltage acceptable to your motor.