Choice of the controller

[Jay-Cee]

Hello everyone,

I own a Fiido T1 Pro cargo fatbike, weighing 37kg, equipped with a 750W motor and a 48V 25A controller with 12 MOSFETs. Due to a degradation of my controller, I replaced it with a generic model of unknown brand (48V 25A, "SQUARE wave" type, 9 MOSFETs) purchased on Aliexpress: https://fr.aliexpress.com/item/1005004870053287.html.

However, during trips of about 10 km in the city on flat roads, without stopping, at a maximum speed of 28-30 km/h and without carrying any load, this new controller overheats and stops. I want to replace it with a Kunteng model (48V 25A, "SINE wave" type, 9 MOSFETs) available here: https://fr.aliexpress.com/item/1005004045976054.html.

Do you think there will be a significant difference in terms of performance and endurance? Or is it better to buy the original controller which has 12 MOSFETs?

Thank you for your advice.

 

[E-HP]

I would either lighten up on the throttle or locate the controller outside of that little metal oven it's located in right now. Not sure if there's a way to drill holes to provide some airflow, but that could be an alternative to relocating the unit.

 

[Jay-Cee]

I would either lighten up on the throttle or locate the controller outside of that little metal oven it's located in right now. Not sure if there's a way to drill holes to provide some airflow, but that could be an alternative to relocating the unit.

I've also thought about it, but the original controller never failed me, even though I was riding much faster with it on all types of roads, regardless of the distance. The controller is not performant enough. The question is: are Kunteng controllers good? Or should I go back to my original controller?

 

[E-HP]

More power means more heat, so unless you can exercise some discipline and not run full throttle all the time, then yes, go back to the original that the bike was designed for.

 

[Jay-Cee]

More power means more heat, so unless you can exercise some discipline and not run full throttle all the time, then yes, go back to the original that the bike was designed for.

Okay, I note! Thank you for your feedback.