Search found 4456 matches

by cwah
Jan 01, 2018 5:42 am
Forum: E-Bike Technical
Topic: Bafang G310 geared hub - 11:1 reduction ratio!!!
Replies: 22
Views: 1195

Re: Bafang G310 geared hub - 11:1 reduction ratio!!!

I think it could be good for my brompton.

It has 16" wheel and I need it to spin to 25mph.

Where can I buy with the relevant controller?
by cwah
Dec 19, 2017 9:32 pm
Forum: E-Bike General Discussion
Topic: Sparkle destroying my Powerpole 45A
Replies: 26
Views: 765

Re: Sparkle destroying my Powerpole 45A

Thanks but i don't have time to make a circuit board.... is there any ready made solution?

If not, I'll just keep it simple with other connectors
by cwah
Dec 19, 2017 3:01 pm
Forum: E-Bike General Discussion
Topic: Sparkle destroying my Powerpole 45A
Replies: 26
Views: 765

Re: Sparkle destroying my Powerpole 45A

why are you disconnecting and reconnecting the pack on a regular basis? add a charge connector to the bike, then leave the battery connected, just plug the bike in. the charge plug wont spark if the charger is on first... it will do a tiny one if it is not on. if you need it for an on/off switch, w...
by cwah
Dec 18, 2017 3:11 pm
Forum: E-Bike General Discussion
Topic: Sparkle destroying my Powerpole 45A
Replies: 26
Views: 765

Re: Sparkle destroying my Powerpole 45A

Yes you got the wrong connector. The powerpole 45s are total and complete garbage for any rating over a few amps. The inrush to the caps on connection will absolutely destroy them as you found out. Instead look for the SB50 connectors. I run those and they are very solid. You may need to file down ...
by cwah
Dec 18, 2017 3:10 pm
Forum: E-Bike General Discussion
Topic: Sparkle destroying my Powerpole 45A
Replies: 26
Views: 765

Re: Sparkle destroying my Powerpole 45A

On one ebike I used PowerPole 45's and PowerPole 75's. I plugged in the 45's first. There was a resistor on that circuit. Then I plugged on the 75's. No sparks. Just 2 plugs, in the right order. Would work fine with two 45's as well. They do have an earlier connecting pin for grounding that can be ...
by cwah
Dec 18, 2017 11:33 am
Forum: E-Bike General Discussion
Topic: Sparkle destroying my Powerpole 45A
Replies: 26
Views: 765

Sparkle destroying my Powerpole 45A

Hello, Tired of doing solding with my bullet connector, I've replaced all of them with Powerpole 45A ones. I thought that crimping is a much neater and time saver option. However, there is a sparkle everytime I connect them to my battery (60v), and after one month, a chunk of my connector was gone!!...
by cwah
Oct 14, 2017 10:53 am
Forum: Battery Technology
Topic: Your DIY battery weight survey
Replies: 11
Views: 570

Re: Your DIY battery weight survey

2.1kwh 11kg
210 × ncr18650pf
by cwah
Sep 26, 2017 12:15 am
Forum: Battery Technology
Topic: DIY 18650 charger to increase bat life
Replies: 5
Views: 453

Re: DIY 18650 charger to increase bat life

Depends on how precise these charger are. You may end up with very unbalanced cells if they are not
by cwah
Aug 31, 2017 11:41 pm
Forum: E-Bike General Discussion
Topic: Is REGEN, really worth it ?
Replies: 16
Views: 770

Re: Is REGEN, really worth it ?

Yes.
by cwah
Aug 30, 2017 2:45 pm
Forum: Items for Sale - New
Topic: Smartphone EV trip dashboard - Android/iOS - $99
Replies: 68
Views: 3719

Re: Smartphone EV trip dashboard - Android/iOS - $99

Looks great.

Is $99 including the bms?
by cwah
Aug 23, 2017 5:22 pm
Forum: Battery Technology
Topic: where to buy BMS? reputable aliexpr / ebay seller?
Replies: 2
Views: 264

Re: where to buy BMS? reputable aliexpr / ebay seller?

Be careful. My aliexpress bluetooth bms seller sent a defectuous one and you loose against aliexpress
by cwah
Aug 20, 2017 8:48 am
Forum: E-Bike General Discussion
Topic: Why are more of you DIYers not in the e-bike business?
Replies: 116
Views: 4084

Re: Why are more of you DIYers not in the e-bike business?

Very hard to make decent profit in ebike business
by cwah
Aug 17, 2017 5:13 am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 67
Views: 4666

Re: bluetooth BMS?

Is it this seller?
http://s.aliexpress.com/Mb2AbyUv

I'm having a dispute with the 15s 30a bms too. Charging doesn't work and seller gives me random instructions to make it look like I did a mistake
by cwah
Aug 16, 2017 9:11 am
Forum: General Discussion
Topic: Dogman Dans E bike burns his house.
Replies: 172
Views: 12019

Re: Dogman Dans E bike burns his house.

Dogman did you keep track regularly of your cells voltage? Not just the pack voltage. Could you say that all cells were balanced and not group were suffering significant sag under load or discharge? I believe just tracking the pack voltage is like checking the size of an iceberg from its tips. What ...
by cwah
Aug 11, 2017 4:22 pm
Forum: Items for Sale - New
Topic: NEW model Eaton APR48-ES 2000w high efficiency 96% for sale
Replies: 14
Views: 1042

Re: NEW model Eaton APR48-ES 2000w high efficiency 96% for s

Whats the voltage range? For $4 is it easy to adjust?

Does it have vibration protection?

And whats the dimension and weight?
by cwah
Aug 10, 2017 2:45 am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 426
Views: 28103

Re: DIY assembly kit for 18650 without spot welding/Solderin

What does the v2 look like? I need compact brackets
by cwah
Jul 17, 2017 12:06 pm
Forum: Items for Sale - New
Topic: Genesis V2100 - Assault & Battery - Illegal in all 50 States
Replies: 132
Views: 26371

Re: Genesis V2100 - Assault & Battery - Illegal in all 50 St

Are you still selling battery bag? I need one strong enough to hold 20kg or 400 18650 cells.

Thank you
by cwah
Jul 15, 2017 7:06 pm
Forum: Electric Aircraft
Topic: Farfles Electric Ultralight.
Replies: 114
Views: 5797

Re: Farfles Electric Ultralight.

Woaaa

Will you be inside or remote controlled?

How long can u fly?
by cwah
Jul 12, 2017 2:46 am
Forum: E-Bike Non-hub Motor Drives
Topic: Reliability & drivetrain wear on 30mph, 350 mi/wk commute?
Replies: 20
Views: 1028

Re: Reliability & drivetrain wear on 30mph, 350 mi/wk commut

Dd mandatory, your bbs will die within few months
by cwah
Jul 10, 2017 3:20 pm
Forum: Items for Sale - New
Topic: ELTEK FLATPACK S 48V 1800w -smallest 1,8kw charger on earth-
Replies: 35
Views: 2407

Re: ELTEK FLATPACK S 48V 1800w -smallest 1,8kw charger on ea

too bad it can't be half weight. I may as well get a Satiator, which is only 360w, but at least is fanless and vibration & waterproof
by cwah
Jul 10, 2017 3:10 pm
Forum: Items for Sale - New
Topic: New Chargery 1500 24s charger
Replies: 44
Views: 2881

Re: New Chargery 1500 24s charger

thanks. A bit on the heavy side!
by cwah
Jul 09, 2017 6:10 pm
Forum: Items for Sale - New
Topic: ELTEK FLATPACK S 48V 1800w -smallest 1,8kw charger on earth-
Replies: 35
Views: 2407

Re: ELTEK FLATPACK S 48V 1800w -smallest 1,8kw charger on ea

Do they have something that would be half the weight and power output? Would be perfect for standard ebike :mrgreen:
by cwah
Jul 09, 2017 7:06 am
Forum: Items for Sale - New
Topic: New Chargery 1500 24s charger
Replies: 44
Views: 2881

Re: New Chargery 1500 24s charger

Whats the weight and dimension?
by cwah
Jul 02, 2017 6:14 pm
Forum: Battery Technology
Topic: Autentic panasonic/sanyo seller
Replies: 3
Views: 311

Re: Autentic panasonic/sanyo seller

Nkon do good job. But no need for pallet
by cwah
Jun 26, 2017 2:46 am
Forum: E-Bike Technical
Topic: An idea for placement of a 12Kg battery on E-bike
Replies: 16
Views: 600

Re: An idea for placement of a 12Kg battery on E-bike

I did this:
[youtube]https://youtu.be/t9vuGRYKaQI[/youtube]

Its removable. I take it out for charging