I've had 2 controllers in a row blow up and melt mosfets and PCB traces and I have no idea why, but I was lucky enough that the aliexpress sellers refunded me.
My bike is running a custom made 14s7p Samsung INR18650-2 in a soft bag, with a Bafang Swx02 (I think?). at least I know that it's a geared bafang motor and rated at 250w at 36v.
The first controller has a Kunteng 9 Mosfet controller rated up to 500w aparently for 36/48v. I had it for about a week and it made a pop and smoke came out of the controller and it and the motor and really hot to the touch until I struggled to unplug my XT60.
Got a refund for that, and thanks to China shipping 1 month without a bike and my controller finally arrived.
This time it was a Kunteng 18 mosfet 48v controller, aparently rated to 2000w.
This one lasted a bit longer, maybe an entire month of riding perfectly normal.
So yesterday I was taking my bike out for another ride and was out about 15km from home, when this controller made a pop and started smoking as well, strangely similar to the other controller I had before this.
The same thing happened, the motor and controller never get over slightly warm to the touch, and when I got home and checked around half of the 18 mosfets were completely melted and the entire board was charred and tiny SMD devices melted everywhere.
So I contacted the seller and they sent me a refund and I ordered another.
BUT before I brutally murder another $100AU controller, does anyone know what I'm doing wrong here. All I do is plug a controller which should handle 2000w continuous(?) onto a 250w rated motor and they keep committing suicide left and right. I honestly have no idea what I'm supposed to do to keep them from blowing.
Is it my 14s battery on a 48v controller?
Is it my phase wires shorting ?
Is it just bad luck to get 2 faulty devices from 2 different sellers in a row?
Someone please help because I'm going to set this bike on fire if it dies on me again
My bike is running a custom made 14s7p Samsung INR18650-2 in a soft bag, with a Bafang Swx02 (I think?). at least I know that it's a geared bafang motor and rated at 250w at 36v.
The first controller has a Kunteng 9 Mosfet controller rated up to 500w aparently for 36/48v. I had it for about a week and it made a pop and smoke came out of the controller and it and the motor and really hot to the touch until I struggled to unplug my XT60.
Got a refund for that, and thanks to China shipping 1 month without a bike and my controller finally arrived.
This time it was a Kunteng 18 mosfet 48v controller, aparently rated to 2000w.
This one lasted a bit longer, maybe an entire month of riding perfectly normal.
So yesterday I was taking my bike out for another ride and was out about 15km from home, when this controller made a pop and started smoking as well, strangely similar to the other controller I had before this.
The same thing happened, the motor and controller never get over slightly warm to the touch, and when I got home and checked around half of the 18 mosfets were completely melted and the entire board was charred and tiny SMD devices melted everywhere.
So I contacted the seller and they sent me a refund and I ordered another.
BUT before I brutally murder another $100AU controller, does anyone know what I'm doing wrong here. All I do is plug a controller which should handle 2000w continuous(?) onto a 250w rated motor and they keep committing suicide left and right. I honestly have no idea what I'm supposed to do to keep them from blowing.
Is it my 14s battery on a 48v controller?
Is it my phase wires shorting ?
Is it just bad luck to get 2 faulty devices from 2 different sellers in a row?
Someone please help because I'm going to set this bike on fire if it dies on me again