Search found 913 matches

by mvly
Jun 28 2014 1:06pm
Forum: Battery Technology
Topic: Nissan Leaf Cells Test Data
Replies: 386
Views: 86136

Re: Nissan Leaf Cells Test Data

How are the LEAF batteries in terms of long-term storage? If I only use a LEAF pack a few times a year for long-distance bikepacking, presuming I keep the pack at the recommended storage voltage, will it last a long time? Is that a bad idea as a use case for this battery? Do they perform better and...
by mvly
Jun 26 2014 10:20am
Forum: EBike Technical
Topic: Problem: Battery OK when 82V, empty when 80V? (Nominal 74V)
Replies: 8
Views: 895

Re: Problem: Battery OK when 82V, empty when 80V? (Nominal 7

1) First off has your controller been modded? i.e. does it support up to 100V? If so, chances are there has been a change of resistor values in the resistor divider and those values you have in the Controller's settings should be multiply either by 1.5x or 2x depending on how the controller is modde...
by mvly
Jun 26 2014 1:04am
Forum: EBike Technical
Topic: Best place to put thermistor in China-controller
Replies: 7
Views: 539

Re: Best place to put thermistor in China-controller

Sounds like a defective controller. FETs don't blow at 90C. I have seen it happen all the time. Controller is cool and one or more FETs just die for unknown reason. For me it was faulty controller design so one FET was being stressed more than others.
by mvly
Jun 25 2014 11:03am
Forum: EBike General Discussion
Topic: Narrowed down my decision; buying eBike
Replies: 26
Views: 2520

Re: Narrowed down my decision; buying eBike

forget the hobby king route. They are scammers so I would stay away from them. But most people here are right in not recommending Lipo for some one like you. Lipo require a lot of care and IMO, is a headache to manage no matter what you do. Major inconvenience if you ask me. If you want a low mainte...
by mvly
Jun 25 2014 10:51am
Forum: Battery Technology
Topic: Ambri: Storing Electricity for our Future
Replies: 11
Views: 850

Re: Ambri: Storing Electricity for our Future

What I don't like about battery technology these days: 1) Too many companies claiming "we have the best batteries" BUT it's 5-10 years away before it can be commercialize. Then why advertise???!!! By then, there will be much better batteries than yours! 2) Too many companies claiming "...
by mvly
Jun 25 2014 1:53am
Forum: EBike General Discussion
Topic: Narrowed down my decision; buying eBike
Replies: 26
Views: 2520

Re: Narrowed down my decision; buying eBike

you mentioned pedego and good reputation in the same sentence ? :D Around here they carry a pretty good name among customers. The local bike shops are all independent and tend not to like them because they are exclusive. The names that people tend to have the highest regard towards is this place ca...
by mvly
Jun 24 2014 8:47pm
Forum: EBike General Discussion
Topic: Narrowed down my decision; buying eBike
Replies: 26
Views: 2520

Re: Narrowed down my decision; buying eBike

kLet's first be clear. 48V10Ah or 36V15Ah will not give you 35miles+ with little assistance and hills. If you are going less than 15mph and moderate assist, then yes maybe. But after a6months of riding, I can assure you that will not be the case if you do 35miles per day everyday for 6 months. I wou...
by mvly
Jun 23 2014 8:23pm
Forum: EBike General Discussion
Topic: Carbon fiber for Greyborg
Replies: 3
Views: 472

Re: Carbon fiber for Greyborg

Hy guys this is Brum from Elettricorse team. I would upload a video but I can't. It's the video where I personally introduce the new carbon fiber 100% Made in Italy side covers of Greyborg frame (warp). Is there anybody who can take the video from Elettricorse page on Facebook and upload it here? T...
by mvly
Jun 22 2014 1:09am
Forum: Battery Technology
Topic: Charging an AllCell battery with solar...
Replies: 6
Views: 886

Re: Charging an AllCell battery with solar...

Try these guys paired with a 150W or more panels. http://www.ebay.com/itm/141179141363?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 It should work, but charging will be limited. If you are shooting for 3-4 hours, I doubt you can do it in 3-4 hours. 48*20 ~= 1KWh. If you are riding a bike, ...
by mvly
Jun 21 2014 8:32pm
Forum: EBike Technical
Topic: ELF: upgrade motor and controller for more power.
Replies: 6
Views: 751

Re: ELF: upgrade motor and controller for more power.

Controller should be kelly. But I think the MAC motor should be good for up to 1.5KW. Though that would be the maximum limit. I would keep the gearing to be the lowest as possible for climbing hills. DD like the 9C would be better, but you will need to hack it up I suspect. But a 48V is a must I thi...
by mvly
Jun 21 2014 8:28pm
Forum: EBike General Discussion
Topic: carry a small air tank or pump, in case of a flat?
Replies: 21
Views: 1390

Re: carry a small air tank, in case of a flat?

I don't need such thing. I never have gotten a flat after the mod I did. Double layer with inner lining and thorn resistance inner tube with inner slime. Make sure the outer layer is tough and you are set! More than 7K miles combined on that design and never have gotten a flat running over many thin...
by mvly
Jun 21 2014 12:05pm
Forum: EBike General Discussion
Topic: www.sunahmebikes.com
Replies: 13
Views: 1125

Re: www.sunahmebikes.com

I have never been stopped by cops where I live. And sometime I am going way more than 30mph. Though when I do, it is usually to pass some idiot car or to merge. Point is, be civil and follow the rules of the road and they will give you very little trouble. I remember one time I was coming down a hil...
by mvly
Jun 21 2014 12:35am
Forum: EBike General Discussion
Topic: www.sunahmebikes.com
Replies: 13
Views: 1125

Re: www.sunahmebikes.com

Close enough to the Zero motorcycle prices that you might as well just buy one of those. But then it wouldn't be a bicycle anymore would it? I think this is in the class of stealth bomber though not exactly marketing to hardcore off-road bikers. If I had a choice between the stealth and this, I mig...
by mvly
Jun 20 2014 10:01pm
Forum: EBike General Discussion
Topic: www.sunahmebikes.com
Replies: 13
Views: 1125

Re: www.sunahmebikes.com

That is some crazy battery capacity! It looks like they are using Crystalyte TC motor. But I am amaze on the battery capacity! Base on the recharge cycle, I would say it is Li-Mn or some sort of that. It is a bit expensive though. Highest price model is 13500 CAD. It would be a bit cheaper for us in...
by mvly
Jun 19 2014 1:26am
Forum: Battery Technology
Topic: Nissan Leaf Cells Test Data
Replies: 386
Views: 86136

Re: Nissan Leaf Cells Test Data

OK I figured out what is wrong with the pack. I think this problem existed way before i notice. It was masked because I parallel them when charging. Here is what I know: 1) After a full charge and removing the connector when converting the 12s2p to 24s1p, I do notice a small spark noise if I don't p...
by mvly
Jun 18 2014 2:04pm
Forum: Battery Technology
Topic: Nissan Leaf Cells Test Data
Replies: 386
Views: 86136

Re: Nissan Leaf Cells Test Data

Just posting this for an important update on my LEAF pack. Just as refresher, I have my 6 modified 2s2p to 4s1p packs in a 24s1p configuration. I run it as a 24s1p but balance charge as a 12s2p because of the limitation on my Hyperion 1420i charger. They very balance after each discharge. They have ...
by mvly
Jun 16 2014 4:35pm
Forum: Battery Technology
Topic: Nissan Leaf set up for noob
Replies: 11
Views: 1367

Re: Nissan Leaf set up for noob

Thanks for your answers ! How old are the batteries you got? These are new cells, supposed to be unused ( By the way : Any precautions to be taken with new packs ?), and they are particularly well suited for my use, as I needed Big capacity on a motorbike conversion. I read the previous thread wher...
by mvly
Jun 16 2014 11:29am
Forum: Battery Technology
Topic: Nissan Leaf set up for noob
Replies: 11
Views: 1367

Re: Nissan Leaf set up for noob

How old are the batteries you got? From my experience, even after roughly 150 cycles on a used nissan leaf pack, the cell voltage stay very balanced if you don't bring them below 3.7V per cell. Again read my post on these packs. Personally I would leave the BMS out of this. Sure it makes charging an...
by mvly
Jun 14 2014 2:04am
Forum: EBike General Discussion
Topic: Carry Solar or More Battery for touring?
Replies: 19
Views: 1471

Re: Carry Solar or More Battery for touring?

There is this: http://www.youtube.com/watch?v=pPt2Qcf4Ds8 I'd sure like to know some of the technical details. Got a bunch of spare 235 watt panels laying around: I'd try building something similar (except with batteries), but I'd worry that even with the panel horizontal, I'd be blown up, down or ...
by mvly
Jun 14 2014 1:01am
Forum: EBike General Discussion
Topic: Carry Solar or More Battery for touring?
Replies: 19
Views: 1471

Re: Carry Solar or More Battery for touring?

Two of those ebay panels you linked to will have a 20 square foot surface area. You'd have to tow around a pretty big trailer to make that work. If you have a recumbent trike. One can go on the canopy and the other on top of the trailer. @motomech I am not sure you can expect a constant 300W from t...
by mvly
Jun 12 2014 3:03pm
Forum: EBike General Discussion
Topic: Carry Solar or More Battery for touring?
Replies: 19
Views: 1471

Re: Carry Solar or More Battery for touring?

@dogman, Glad we are coming up with similar numbers. Point is I think you can get 1KWh out of the 300W panels riding 12 hours or more during summer days. Yes I have factored in all the inefficiencies. I can assure I can get 300W panels under 25lbs. Maybe even under 20lbs with all the wirings. Techno...
by mvly
Jun 12 2014 10:06am
Forum: EBike General Discussion
Topic: hub or non-hub motor
Replies: 16
Views: 1165

Re: hub or non-hub motor

Wesnewell, Can your bike do 40 on flat road? I see that kit everywhere, and a controller+battery upgrade is eventually going to happen. I just need to make sure I get the right motor. Did you have to mod your bike for disc brakes for braking from the high speeds? If you are looking to getting this ...
by mvly
Jun 11 2014 5:13pm
Forum: EBike General Discussion
Topic: hub or non-hub motor
Replies: 16
Views: 1165

Re: hub or non-hub motor

My main goal here is to decide between geared and hub motors, not to get 40mph. It would be nice, but it's not going to happen. It really depends on your usage. So there is no simple answer. But usually a 1KW hub generic motor is good for what most people need. Just make sure you use less than 1KW ...
by mvly
Jun 11 2014 4:52pm
Forum: EBike General Discussion
Topic: hub or non-hub motor
Replies: 16
Views: 1165

Re: hub or non-hub motor

You won't get 70kmph from 1000W. Unless you build a recumbent with super aero, carry minimal battery weight, make the frame out of carbon/titanium, and gear the pedal assist proper. In short, it's not impossible, it's just not very likely. To give you a comparison: I pretty much sustain between 40mp...
by mvly
Jun 11 2014 4:37pm
Forum: EBike General Discussion
Topic: Carry Solar or More Battery for touring?
Replies: 19
Views: 1471

Re: Carry Solar or More Battery for touring?

Pros, freedom of being able to charge anywhere you want really, no dependency to a socket. Cons, generally heavier, a bit more hassle to set up, and expensive, though you can get really thin, efficient, light panels just my 0.0119091924 British pounds. I wouldn't say no dependency on a socket. I th...