Upgrade From Ampedbike Kit To YescomUSA 48 Volt 1000 Watt

[cruiserbikeman]

Right now I'm using an Ampedbike Kit (36v 750 Watts) with a Ping 48 Volt 15ah battery. While I like the ampedbike kit, I've noticed the controller heats up a lot in warm weather. So I wanted to go with a true 48 volt controller with an increase in wattage YescomUSA Kit (48v 1000 Watts) instead. I do want to order it this week. However, I wanted to get some advice from some board members before I make the purchase.

[dogman]

In my opinion, performance will be relatively similar. With that battery, you are about at the top for wattage, but you could perhaps bump to a 12 fet controller that might run cooler, but have it set to no more than 25 amps.

You are aware, that very likely you see 1200w momentarily on your current setup?

To keep the controller cooler, run WOT more.

[cruiserbikeman]

You are aware, that very likely you see 1200w momentarily on your current setup?

To keep the controller cooler, run WOT more.

I do ride with wide open throttle in conjunction with using the seventh gear when pedaling uphill. In addition, I have a electric tricycle with a 450 watt direct drive front hub and a 48 volt controller. Its connector is only designed to work with a SLA battery. When I hooked it up the ampedbike controller to the tricycle hub it actually works! So, I'll just go ahead and put that kit on to the tricycle and buy a new kit for the cruiser.

[wesnewell]

I've bought 3 yescomusa kits and all 3 have come with 30A controllers. The 48v 500w kits come with a 12 fet controller and the 48v 1000w kit came with a 15 fet controller. All have had 63V caps and 68v fets. I replaced the controller on the 1000W motor with a 72v 40A controller with 100V caps and fets for $35.

[ez-Ebike]

It'll be tough to order this week because the 48V 1000W rear kit is out of stock! I emailed them to see when the new shipment will come in, I'll update you if you are interested.

[dogman]

That would be an upgrade then, to a 30 amp controller. You got a battery that can handle that? If not, you better upgrade batteries too.

I don't recomend a 15 ah ping for a controller over 25 amps.

30 amps x 48v = 1440 watts. And I predict a CA would see real world 1600w since "48v" runs at around 58v hot off the charger.

[cruiserbikeman]

Thanks for the input. I will most likely buy a front wheel kit since I have the battery on a rear rack in a hard plastic case.

[cruiserbikeman]

That would be an upgrade then, to a 30 amp controller. You got a battery that can handle that? If not, you better upgrade batteries too.

I don't recomend a 15 ah ping for a controller over 25 amps.

30 amps x 48v = 1440 watts. And I predict a CA would see real world 1600w since "48v" runs at around 58v hot off the charger.

What'll happen? Will the battery drain too fast or will the BMS constantly shut off?

[dogman]

A battery should be used within it's c rate. so a 40 amp controller would be able to discharge your 2c ping battery at nearly 3c.

I tend to recomend 25 amps max for 15 ah ping, so you won't pull even 2c continuous up a hill into the wind some day.

The general rule of thumb is batteries last longer if you use them closer to half the c rate. For a 15 ah ping, 15-20 amps continuous is good for them. 30 amps continous is not.

Hammer a battery hard and nothing happens if all 48 cells are perfect. But nobody has 48 perfect cells. What happens in reality if you hammer your ping is that one cell wears out much quicker than the others, and you get a 500 cycle battery instead of a 1000 cycle battery. The weak cell gets damaged, and when it dies, you now have 1/3 less capacity because of just one cell that died.

Same thing that makes cheap ebay batteries that way, right out of the box.

[ez-Ebike]

Are you sure you want a FWD 1kw kit? That seems like a lot of power for a front fork. Just concerned about safety after seeing some of the threads on here.

[cruiserbikeman]

Hammer a battery hard and nothing happens if all 48 cells are perfect. But nobody has 48 perfect cells. What happens in reality if you hammer your ping is that one cell wears out much quicker than the others, and you get a 500 cycle battery instead of a 1000 cycle battery. The weak cell gets damaged, and when it dies, you now have 1/3 less capacity because of just one cell that died.

I understand now. I don't want to ruin a battery pack that I had for a little over two months. I'll stick with what I have now since I had this current kit for less than six months. After this kit runs its course, I'll then look towards stepping up to a faster kit and a bigger battery.

[cruiserbikeman]

Are you sure you want a FWD 1kw kit? That seems like a lot of power for a front fork. Just concerned about safety after seeing some of the threads on here.

I have a steel fork and frame. I decided to hold off and keep using my Ampedbike kit at least for the rest of this year.

[motomech]

I see YESCOM USA rear kits on US Ebay.