Search found 41 matches

by Stu Summer
Apr 15, 2018 5:48 pm
Forum: Battery Technology
Topic: BafangUSA 52V Dolphin pack problems
Replies: 2
Views: 94

BafangUSA 52V Dolphin pack problems

I bought a Bafang USA 52V 11.6ah Dolphin pack. The voltage starts fading after 2 miles of riding at 20mph even when it was new 3 months ago. Also, sometimes the charger reads 58.8v when the pack is fully charges and sometimes it reads 54.1v. BafangUSA advertises these as Panasonic batteries NCR18650...
by Stu Summer
Apr 02, 2018 7:30 pm
Forum: Items for Sale - Used
Topic: FS (Vermont) - MAC 8T cassette on 20"
Replies: 10
Views: 376

Re: FS (Vermont) - MAC 8T cassette on 20"

If you didn't sell, I'm interested in the whole wheel, plus a controller and yes a tire. I'm in NYS but would want to pay you to ship it
by Stu Summer
Apr 02, 2018 7:29 pm
Forum: Items for Sale - Used
Topic: FS (Vermont) - MAC 8T cassette on 20"
Replies: 10
Views: 376

Re: FS (Vermont) - MAC 8T cassette on 20"

If you didn't sell, I'm interested. I'm in NYS but would want to pay you to ship it.
by Stu Summer
Mar 15, 2018 4:45 pm
Forum: E-Bike Technical
Topic: Wires jumping!
Replies: 2
Views: 192

Wires jumping!

I'm trying to trouble shoot a BBSHD which has blown two bms's and some fuses. When I connect a dolphin 52V pack to the leads to the bbshd and turn it on, the leads literally jump or jerk, and it blows the fuse (though invisibly.) A new fuse reactivates the pack. But when I do a continuity test on th...
by Stu Summer
Feb 22, 2018 5:30 pm
Forum: Motor Technology
Topic: Voltage drop
Replies: 2
Views: 160

Voltage drop

I'm trying to problem shoot a dead BBSHD which killed two Dolphin packs, probably a short. But before I get to the BBSHD, I have plugged my Luna 58V charger straight into the xt90 that leads to the stock controller. At the output xt90 the multimeter shows the charger putting out 58.8v. But 2 inches ...
by Stu Summer
Feb 21, 2018 8:29 pm
Forum: Battery Technology
Topic: Does your Dolphin pack have a fuse?
Replies: 2
Views: 168

Re: Does your Dolphin pack have a fuse?

That is the next project. As I have two bikes, I needed to deal with the batteries first.
by Stu Summer
Feb 20, 2018 8:36 pm
Forum: Battery Technology
Topic: Does your Dolphin pack have a fuse?
Replies: 2
Views: 168

Does your Dolphin pack have a fuse?

I have three Dolphin 52v packs. The two I bought from Luna do not have fuses or fuse sockets under the fuse flap. There is nothing there. Both BMS's have been fried by shorts. The Dolphin I bought from BafangUSA does have a fuse. It survived the same short with only a burned fuse, now replaced and b...
by Stu Summer
Feb 17, 2018 10:02 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Two fried batteries, 1 fried BBSHD
Replies: 1
Views: 247

Two fried batteries, 1 fried BBSHD

So my son's bbshd bike has a little wreck. The display harness pulled loose. Plug it back in, tiniest of surges in the motor then nothing, no display, 52V Dolphin battery dead. Take it home, try my 52V Dolphin battery from my bike. Tiniest of surges in the motor but again nothing displayed and won't...
by Stu Summer
Feb 15, 2018 8:39 pm
Forum: Items for Sale - New
Topic: Velomobile for the price of a trike
Replies: 1
Views: 462

Re: Velomobile for the price of a trike

Still for sale?
by Stu Summer
Dec 23, 2017 7:53 pm
Forum: E-Bike General Discussion
Topic: Panniers, trailers, and other cargo solutions
Replies: 188
Views: 12279

Re: Panniers, trailers, and other cargo solutions

Ecue,

What is that trailer with the really long tongue and where can I get one? It look like a canoe trailer.
by Stu Summer
Nov 20, 2017 8:52 pm
Forum: Resources & EV Related Parts and Services
Topic: Need Dolphin Battery repaired
Replies: 1
Views: 298

Need Dolphin Battery repaired

Hi all, I had my 52V Dolphin jerry-rigged on my too-short top bar and my son accidentally tried to connect it to the motor reversed. Big spark, blown BMS. Luna says it is a discontinued bms and for me to install the new one will require rewiring the harness as well. This is beyond me. DOES ANYONE IN...
by Stu Summer
Aug 01, 2017 9:12 pm
Forum: E-Bike General Discussion
Topic: Ebikes practicality for cross country expeditions
Replies: 26
Views: 1973

Re: Ebikes practicality for cross country expeditions

To make solar single-track viable, you would need to have a setup where you do almost all the work (low power consumption). High powered cycles advertises a fold up solar panel that makes it look like you can just unfold, eat lunch, then ride away with fully charged batteries. Don't be fooled by th...
by Stu Summer
Aug 01, 2017 8:34 pm
Forum: Battery Technology
Topic: Charge Two 18v batteries in series with a 36V charger?
Replies: 1
Views: 188

Charge Two 18v batteries in series with a 36V charger?

IMG_1128.JPG
IMG_1128.JPG (143.55 KiB) Viewed 188 times
Is it okay to charge two 18v batteries wired in series with a 36V solar panel?
by Stu Summer
Aug 01, 2017 3:39 pm
Forum: E-Vehicles General Discussion
Topic: How do I wire it?
Replies: 2
Views: 224

How do I wire it?

Now I have a 36V electric bike without the battery. A 36V solar panel on a trailer and two 1.5ah 18V lithium drill batteries. What I want to do: Have the batteries buffer the panel's output so that the panel is continually charging the batteries and the batteries are driving the motor. How do I wire...
by Stu Summer
Aug 01, 2017 9:04 am
Forum: Items for Sale - Used
Topic: 72v 32a hall sensor controller (US)
Replies: 8
Views: 553

Re: 72v 32a hall sensor controller (US)

Do you know what it's low voltage cut off is?
by Stu Summer
Jul 31, 2017 5:14 pm
Forum: Motor Technology
Topic: Can you run a motor without a controller?
Replies: 2
Views: 278

Can you run a motor without a controller?

I am trying to cob together a simple solar bike demonstration. I have a solar panel (Vmpp 32V, Voc 38.9, Pmax 285W, Impp 8.88A) which I put on a little trailer. I have a cheap ebike with a 36V rear hub motor, no name controller and no battery. When I connect the solar panel to the controller, replac...
by Stu Summer
Jul 16, 2017 6:57 pm
Forum: Items for Sale - Used
Topic: Kepler Friction drive
Replies: 2
Views: 358

Re: Kepler Friction drive

What voltage(s) will the motor run at. Have you used it and what has the performance been like? I live in New York State. Where are you?

Stu Summer
by Stu Summer
Jul 05, 2017 10:41 pm
Forum: E-vents
Topic: Sun Trip Tour 2017
Replies: 2
Views: 393

Re: Sun Trip Tour 2017

I would love to see photos of your rig! I just put a 250W solar panel on wheels and connected to my ebike with a cheap controller. I'll post some pics when I get home.
by Stu Summer
Jun 23, 2017 9:20 am
Forum: E-Bike General Discussion
Topic: Hub motor on front suspension fork?
Replies: 13
Views: 620

Hub motor on front suspension fork?

Luna says not to put a hub motor on a front suspension fork? Why? What goes wrong? Is it inherently dangerous or only if you hot rod it?
by Stu Summer
Jun 22, 2017 7:35 pm
Forum: E-Bike General Discussion
Topic: Too good to be true?
Replies: 7
Views: 526

Too good to be true?

http://www.ebay.com/itm/26-48V-1000W-Ebike-Front-Wheel-Electric-Bicycle-Motor-Conversion-Kit-Motor-Hub/152211337572?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D44730%26meid%3D0aef9a5d7c0a476b90041a3b207edf24%26pid%3D100005%26rk%3D3%26rkt%3D6%26mehot%3Dpp%2...
by Stu Summer
Jun 17, 2017 7:57 am
Forum: Motor Technology
Topic: Hub Motor that works with a wide voltage range
Replies: 11
Views: 614

Re: Hub Motor that works with a wide voltage range

And if it's for education purposes, you'll spend less time working on a hubby, and more time doing whatever you're sposed to be doing! in fact other than the initial instal, in 5000k I've done zero work on my hub motor. I've replaced a spoke or two and brake pads, and a bunch of other stuff like li...
by Stu Summer
Jun 15, 2017 7:59 pm
Forum: Motor Technology
Topic: Hub Motor that works with a wide voltage range
Replies: 11
Views: 614

Re: Hub Motor that works with a wide voltage range

Thanks, guys, that was very helpful! My project is on a bikeE and I am still trying to decide between a rear hub motor and cyclone. Any opinions?
by Stu Summer
Jun 15, 2017 7:57 pm
Forum: Battery Technology
Topic: Charge 52V Dolphin with this MPT-7210A?
Replies: 10
Views: 722

Charge 52V Dolphin with this MPT-7210A?

MPPT.jpg
MPPT.jpg (85.3 KiB) Viewed 722 times
Can I charge my Luna 52V Dolphin pack with a 285W solar panel by using this MPPT Solar Charge Controller set at, say, 56V or 52V? Will it damage the battery?

Thanks, I'm pretty wet behind the ears.

Stu Summer