5000w kit

Just to add. It's a sw900 display and the last thing I had from the seller was check p14 which I did. It has numbers from 1 to 50. Non of these numbers if changed make any difference..

How many amps is the controller good for, or claimed to be. Photos or links would be helpful.

It is supposed to be 80 continuous. Thanks for the quick reply

Mark5000 said:

So I'm at a loss. Any ideas?

Click to expand...

My first thought is just that it's a kit that won't do more than about 3000 watts. Chinese companies in particular are well known for grandiose advertising claims that aren't really valid.

Mark5000 said:

It is supposed to be 80 continuous. Thanks for the quick reply

Click to expand...

Does it have connection for a three speed switch. Sounds like a more common 1500- 2000W controller. Photo or links would help.

Mark5000 said:

I've built a 5000w bike. 72v 38ah battery. The problem is the bike will not go over 2700w.

Click to expand...

What load are you placing on the system? Meaning, what specific conditions are you riding under?

If you don't put more than 2700w worth of load on it, it won't use more power than that. (we have had people build higher power bikes that don't realize this, and are not using their system hard enough to draw that much power).


Regarding other possibilities, we'd need more info. Please link the specific page each item was purchased from, so that we can see all of the information they have on it and won't have to get each piece of info from you one at a time. Listing all of the settings in the display may also help us help you find the problem. Showing a complete diagram of how you have it actually wired could also help (not whatever the seller provides), preferably also with pictures of the high-current connections you have actually made (phase wires from motor to controller, battery to controller).

What load are you placing on the system?

Click to expand...

Interesting to see what the situation is. Remember playing with throttle ramps on my first CA. I could vary the displayed power peaks from about the values the OP's is seeing to over 8KW just by setting a steeper throttle voltage gain. Flat ground with as much throttle as I could control from a slight roll. That was a eye opener for me.

Hello. Here's a few photos. The load is full throttle up a fairly steep hill near my home. The kit is from suring off alibaba. The battery is off aliexpress via gtk batteries.

Here's the bms

I can still get 54mph out of it. But its the fact that I paid for 5000w. What you guys think?

When I put 5000 watts into the calculator, I get 54mph on a 50 pound mtn bike.

http://www.kreuzotter.de/english/espeed.htm