Search found 20 matches

by Jenming
May 13 2020 10:41pm
Forum: Forum Rules and Features
Topic: The future of our forum - facebook versus web forums
Replies: 123
Views: 30058

Re: The future of our forum - facebook versus web forums

My point of view here is somebody who's relatively new but also relatively into this kind of stuff and into this forum. From what I've been able to find this forum is the best online e-bike resource available. so everything below is constructive criticism. this is the go to place for me. and it's ce...
by Jenming
May 12 2020 2:38pm
Forum: E-Bike Technical
Topic: EBIKE using Lawn mower batteries
Replies: 17
Views: 423

Re: EBIKE using Lawn mower batteries

The purpose is he already has the batteries and doesn't want to buy a new pack if these will work. The controller steps down the voltage, perhaps that could be enough? Use a 120v controller and a 48v motor and never let the controller go over 50% pwm? Maybe someone who knows more than me would know ...
by Jenming
May 11 2020 9:49pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Milwaukee M18 conversions
Replies: 8
Views: 247

Re: Milwaukee M18 conversions

Very nice, clean builds :)
by Jenming
May 11 2020 3:57pm
Forum: E-Bike Technical
Topic: EBIKE using Lawn mower batteries
Replies: 17
Views: 423

Re: EBIKE using Lawn mower batteries

120v 2.5ah, sounds more like 250whr. Two in parallel seems like it should get you somewhere with a mid powered motor, something you'd be running 1500 watts through, plus or minus. Not something huge like that 273 qs motor. But volts that high and ah that comparatively low sounds hard to manage. Most...
by Jenming
May 09 2020 10:28pm
Forum: E-Bike Technical
Topic: MAC GMAC Hot Rod Info
Replies: 15
Views: 410

Re: MAC GMAC Hot Rod Info

If you are riding along on flat ground, it is roughly saying you can push 1000 watts through a MAC/GMAC once you reach steady state without the temperature increasing any higher. 1000 watts equates to somewhere between 28-30 mph depending on all of the variables and that is why I say if you want to...
by Jenming
May 08 2020 7:58pm
Forum: E-Bike Technical
Topic: MAC GMAC Hot Rod Info
Replies: 15
Views: 410

Re: MAC GMAC Hot Rod Info

B. Max Amperage: 60A battery and 180A phase...but had to drop to 50A/180A settings due my BMS limitations. I ran a 12 FET 3077 Infineon controller for a long time and used an 18 FET 4110 Infineon controller when I went above 40A. No problems with the clutch or gears. I greased the gears using Mobil...
by Jenming
May 08 2020 7:52pm
Forum: E-Bike Technical
Topic: MAC GMAC Hot Rod Info
Replies: 15
Views: 410

Re: MAC GMAC Hot Rod Info

Difference between regular MAC and Grin's version I assume are worth the extra? I think Justin mentioned that the gmac was properly sealed for liquid coolant. So if you plan to cool it, then probably yes worth the money? No atf on your brakes. Also it has a locked clutch witch allows regen. Worth c...
by Jenming
May 04 2020 7:03pm
Forum: Battery Technology
Topic: Help me with materials and crimping for a 21700 battery build
Replies: 20
Views: 577

Re: Help me with materials and crimping for a 21700 battery build

If I wanted to encapsulate a battery, I would look at wax phase change materials. It should be pretty easy to melt in to there and instead of insulating the battery, it can absorb heat from the battery to control pack temperatures. I'm not sure how to do it without getting messy at high pack temper...
by Jenming
Apr 22 2020 7:17pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223602

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Thanks for the link ZeroEm, I have a general question about the simulator. According to the power curve, I will be using 40 battery amps when I hit 25mph. I am assuming that this power draw is at the instant that I hit that speed and while using a speed/voltage based throttle. Once I stop accelerat...
by Jenming
Apr 14 2020 5:56pm
Forum: E-Bike General Discussion
Topic: New cargobike build input before purchase: 52v Gmac 26" 8T or 10T (moved from E-vehicles)
Replies: 8
Views: 302

Re: New cargobike build input before purchase: 52v Gmac 26" 8T or 10T (moved from E-vehicles)

The baserunner works really well with this motor. I have an 8t with a 52v battery. 35mph is my max on flat ground and needs a pretty deep tuck and only comes in the upper half of the battery charge. So if max 35 mph is important you'll need the 8t. Pulling 36 amp hours out of a 40 amp hour battery m...
by Jenming
Apr 01 2020 7:58pm
Forum: E-Bike General Discussion
Topic: Tell me about MAC 3 speed and cruise button
Replies: 11
Views: 303

Re: Tell me about MAC 3 speed and cruise button

Take a look at the gmac from ebikes.ca with a baserunner controller. Very smooth, controllable power with the torque based throttle.
by Jenming
Mar 20 2020 8:22pm
Forum: General Discussion
Topic: Helmet E-Bike standard NTA 8776
Replies: 9
Views: 514

Re: Helmet E-Bike standard NTA 8776

If you are concerned, step up to a motorcycle/scooter/moped helmet from dealerships. Bicycle helmets are meant for people riding human powered bicycles, not a MOTORED BICYCLE. Well, I disagree with this. An eBike helmet, built to an ebike standard, is a helmet meant for a motored bicycle. Whether i...
by Jenming
Mar 20 2020 1:03pm
Forum: General Discussion
Topic: Helmet E-Bike standard NTA 8776
Replies: 9
Views: 514

Helmet E-Bike standard NTA 8776

It seems like ebike speeds could deserve better helmets, but I haven't been able to find much on whether helmets meeting this standard are actually the best helmet for e-bike use. In my mind an e-bike helmet should really be useful to 35 mph or so, these are only rated to 28. Anyone have any experie...
by Jenming
Mar 17 2020 12:27pm
Forum: Alternative Energy
Topic: Where should I connect by Solar charge controller A or b?
Replies: 4
Views: 306

Re: Where should I connect by Solar charge controller A or b?

From what I remember installing my system. The controller is outputting at a slightly higher college than your batteries and so will provide the entire load, whether from the inverter or charging the battery, as long as there is enough solar energy to do so. I assume you specced the controller to be...
by Jenming
Mar 14 2020 8:14pm
Forum: Alternative Energy
Topic: How to connect 2 PV strings
Replies: 8
Views: 445

Re: How to connect 2 PV strings

At least with my panels, you can connect two series in parallel without doing anything special. Connecting 3 or more in parallel you need to fuse each series.
by Jenming
Feb 18 2020 1:24pm
Forum: Electric Watercraft
Topic: Electric 22 feet speedboat from 1957
Replies: 21
Views: 1211

Re: Electric 22 feet speedboat from 1957

For now i have the idea to use the panasonic ncr18650pf 2900 mah cells. around 1700 of them to get about 18KW hrs of battery pack.
Have you considered using a salvaged car battery? The 2013 leaf has a 21kwh battery. Some already have cooling solutions.
by Jenming
Jan 25 2020 10:18pm
Forum: Battery Technology
Topic: Understanding and Using EGO Power+ Batteries
Replies: 100
Views: 30794

Re: Understanding and Using EGO Power+ Batteries

Nice. Did you figure out a way to decode the BMS signal from the battery? So if a cell group goes low you'll know it before damaging the battery? I've been using two 5ah batteries in parallel which seems to work quite well. I haven't decoded the data signal, but I think it may be a Texas Instrument...
by Jenming
Jan 04 2020 11:20am
Forum: E-Bike Build Threads / Photos & Video
Topic: Motor advice 1500-watt leaf?
Replies: 3
Views: 617

Motor advice 1500-watt leaf?

I am working on my second bike and looking for some confirmation on my motor choice (Leaf 1500 rear DD), or alternate advice. My current bile is an old sensorless front tire DD kit running at 52v 20a. Runs about 30 mph on flats. It’s a lot of fun but my major complaints are not enough power to deal ...
by Jenming
Apr 07 2019 7:03pm
Forum: E-Bike General Discussion
Topic: Identifying / upgrading craigslist ebike
Replies: 5
Views: 421

Re: Identifying / upgrading craigslist ebike

Thank you all. Those were very helpful responses.

I'm going to go ahead and replace the lead-acids with hopefully a 48v / 15 ahr pack. Should have some fun with it this summer :)
by Jenming
Apr 06 2019 2:26pm
Forum: E-Bike General Discussion
Topic: Identifying / upgrading craigslist ebike
Replies: 5
Views: 421

Identifying / upgrading craigslist ebike

Hi people, I picked up an ebike on craigslist and am having fun with it, but want to see if I can make it a little better. I'm hoping to go 20+ mph for about 20 miles on a charge. This is what I've been able to figure out so far. It has an Aotema front hub motor. I didn't get anywhere googleing the ...