Here are some pictures to get a good idea of it's physical size. It's very similar to a Xie Chang 24 FET, but it's much heavier and the quality of construction is vastly superior.

Phase current control based throttle - This makes riding very nice. It has a variable up/down time limit settable in milliseconds to help buffer out any throttle jolts that happen while riding. The throttle voltage end points are adjustable so it will match any pot type throttle or hall based throttle and provide full range. The throttle mid point and also the phase current mid points are adjustable so that you can customize the throttle curve. So your magura is for sure different than my throttle. Maybe sends signal range like 0,2-4,0 V , so you go TPS low 5% and TPS high 80%. Mine throttle sends signal lets say like 0,9-4,0 V , so I go TPS low 20% and TPS high 80%. Full disclosure, I will be selling these units because I like them. I will start a separate thread in the appropriate for sale section, so please keep that discussion in that thread. It takes only 3 minutes for the motor to be well matched on its bestelectronic angle at the first time.

Sabvoton Controller 72200

Connection to the controller is a bit easier on the Kelly, no need to select the right port, it is done automatically. The Kelly manual notice is stupid as shit, it mentions that you should absolutely remove all wiring from the controller and supply it with 10-30V to make any programming, while it is actually not necessary at all and works perfectly fine even when all the wires are connected to the machine. Completely moronic advice. Regen - It has 2 types of regen, slide regen and normal button regen activated by sending a +5v signal to the regen wire. Both as set in phse amps and can provide a strong regen force, enough to cause the rear 19x"3.0 Shinko SR244 tire to be on the verge of skidding while it's engaged at any speed over 20mph. Wish I could help you with the #30h error. I think others have reported that error before. Any good results?

It's special design for QS brushless motor controller for Conversion Kits, which can match with QS HUB MOTOR Rated Power 3000W-4000w.if you want to match with new brand motor, some parameters should be tested by yourself. The motor torque ripple will be reduced to the minimum, so as toensure electric vehicle to run without any noise and vibration, smoothly, andcomfortably. Sabvoton controller only design sine wave type controller so far, it’s brushless DC controller, 120 degree phase angle. Generally, we matched it well with QS Motor, if you want to match with new brand motor, some parameters should be tested by yourself. The precise current ring can provide accurate torque input to meetthe requirement 0f large torque output during vehicle starting and climbing.for my maguara twist throttle, I was told to set the TPS dead low to 5% .....because at a higher setting, the throttle would not send power to the motor until it had been turned 1/2" of twist....which I did not like it that way.[/quote] The motor torque ripple will be reduced to the minimum, so as to ensure electric vehicle to run without any noise and vibration, smoothly, and comfortably.