I picked up a, presumed, fair quality multi-voltage capable brush controller. (20-72v 25a CONTINUOUS 30a SURGE.)
72V capable - confirmed 80V caps.
20V 24V 36V 48V 60V 72V PWM High Power DC Motor Speed Controller - $38.88
Just confirmed that the controller in my 2008 eZip Trails was getting a bit flaky, so it shall receive the new controller and serve as a testbed for various voltage and re-gearing combinations.
Yes, it will fit as oem replacement.
Tho, I will scavenge connectors from dying oem controller.
At 5 years and 5500+ miles it has proven very durable ... after I re-spoked the rear wheel.
One side of pack contacts "melted", and I replaced with a durable AC power cord plug, So I will be able to test oem style packs, as well as anything I can hook a power cord to.
Most importantly, the motor has served sufficiently well ... that a fiery Viking style funeral might be appropriate.
I intend on testing 22.2V, 25.9V, 33.3V, 37V, 44.4V + ... ? See - Homemade Battery Packs
I also will try 20T and 16T wheel freewheels. See - EZip - IZip 20mph Upgrade $20!
As well as motor sprockets of 9T, 11T, 12T, 13T, 15T. See - Re-gearing the eZips - Simple Mods!
Results, impressions, problems etc. will be documented and posted.
I intend on using the results for determining mods for my more "upscale" eBikes.