Hi amber wolf, it’s a AUD$40 AliExpress controller model 2922043 brushless controller... here’s the specs
Strong driving stability
Phase 120/60 compatible
Start the anti-speed function
Waterproof and moistureproof
Hall/Hallless Dual Mode Compatible
Turn the line short-circuit protection function
Specifications:
Input voltage:48V
Power:1500W
Current limit: 45A
Undervoltage protection:42V
Braking: high and low
Phase angle: automatic
Function: anti-theft three-speed reverse
First look at your electric car battery voltage levels,corresponding to the selected voltage controller,look at the size of the current controller previously used,such as the current is 16A-18A 350W controller,22A-24A controller is 450W,28A -30A controller is 500W,31A-33A is 600W controller,33A-35A is 800W controller,36A-38A is the 1000W controller,40A-43A is the 1200W controller,50A is about 2000W controller.Such selection controller,if the original car is 350W controllers we recommend the use of bigger,so you can take advantage of the highest motor speed and power.
Size:25.2x10.6cm/9.92x4.17inch
Having said that I’m wondering if the problem is that I’m using a “brushed” motor ? The thing is it runs fine with the driven wheels off the ground?? Maybe the battery capacity 48v x 18Ah is the problem..just too weak to drive it?