I would first like to mention, that I've had a Ebike kit for about 8 years, and dealt with and fixed every problem that was thrown at me, or the very least. I figured out what the problem was. I've also had my share of problems with batteries in the past. I had tabs come loose from a pack and was able to fix it, and have it running just fine again.

I finally got my new ebike kit up and running after my last bike/kit was stolen, and I've had non stop problems with the battery. When I first got the Golden Motor Black Pie 5 Vector with Sinewave Controller kit, I plugged the battery into the charger I had left over from Ping Battery. This is when I first noticed problems. The charger kept cycling on and off, but eventually brought it up to a full charge.

Not only that, the battery was giving me very inconsistent voltage readings. When I originally took a reading. It read 45.7 V. I found this odd, as it should of been charged up. I checked it later on and this time it read a little over 53 Volts. I figured, maybe I got a wrong reading. Shrugged it off. Checked again It was @ 45.7V.

I tried with a different meter and I get 52v. Tried my good meter again, and back to 45.7v. I'm like what is going on here. Why is this battery all over the place.

So I put it on the bike and use the bike for a little bit. I got MAYBE 8km out of it, before the BMS tripped @ 48v. Charged it again overnight. Ran it again, and it seemed fine. I had to take it to the bike shop for a wheel fix, as I got loose spokes and such.

Let it charge once again overnight, and when I got the bike back. I went to take it out for a test ride, and soon as I apply and sort of load. The BMS on battery will trip. I can have the bike upside down, and throttle on auto throttle and the motor will keep going for as long as I let it...

It seems to be only when a load is applied, and I draw a large amount of power at once from the battery, that the BMS trips. I'm leaning towards a bad battery, or bad BMS at this point. I've never seen a battery behave in this way before.