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Richard230 replied to the thread Swiss EV show.
" Very nice bikes and great styling. Thanks for sharing, Hugues. "

3 Hours Ago

Richard230 clicked Likes for this post: Swiss EV show by Hugues

3 Hours Ago

Hugues replied to the thread Swiss EV show.
" Fun day yesterday at the Swiss EV show, and it was sunny and hot.

Couple of pictures, thanks to Ian from the forum, also met Athlon who was on site too.

Attachment 7361Attachment 7362Attachment 7363

and a short clip here: too bad on the video Raphael (the green bike) was not with us, quite powerful beast.
https://goo.gl/photos/RDdYC2ESQxJwh1Uq6 "

17 Hours Ago

Carnut1100 created the thread Motor selection advise wanted.
" Hi all.
Long time lurker, ex electric car owner (Mitsubishi i MiEV) and about to be bike converter...

I've got a Honda Hornet with a blown engine...originally fitted with MC22 engine from a CBR250RR but in a naked frame.
https://en.m.wikipedia.org/wiki/Honda_CB250F

My brother blew the engine racing an R6 over a mountain...
Bike is in good nick otherwise, and importantly it is free and LAMS approved (Learner Approved Motorcycle Scheme) which means I will be able to legally ride it.

To keep LAMS rating, an electric bike needs to be below 25kW.

Batteries are sorted, will be using lightly used pouch cells obtained at the right price from a friend.

Keeping chain drive so no hub motors, and I want a top speed of 130kmh at full tilt so I can use the maximum speed limit on local freeways of 110kmh without being at max.

Voltage will probably be 72-96 range depending on motor and controller chosen.

Budget for the motor is tight, cheaper is better, but a couple of hundred to make a difference between a slug and a nice bike is going to be found if needed.

From some reading I'm thInking the ME0913 with a Kelly KLS7230S might be a good combo...motor limited to 30kW peak, but controller limited to 21.5kW keeps it under the legal limit, and has regen capabililty.

Is there anything I'm missing?
Is there a better option? "

1 Day Ago

Electro Flyers replied to the thread dc-dc booster.
" These are I think from the same company that makes your boost converter: https://www.banggood.com/MPT-7210A-A...p-1056572.html

I think they would be a good cheap, compact solar charge controller for a small dedicated PV set-up for charging a <72V EV battery system. I wonder if these could be put in series? Maybe 3 of them with separate panels charging 80V blocks of my 240V battery bank? "

1 Day Ago

Stevo replied to the thread dc-dc booster.
"
Quote Originally Posted by Stevo View Post
http://www.ebay.com/itm/322374615632

Maybe if you wire 20 or so of these in parallel you might be able to get it to work ! LOL

Sent from my SM-T377V using Tapatalk
I would wire the necessary mean wells in series to get your 250 v once you establish a good stable output from the panels. Mean wells have isolated outputs

Sent from my SM-T377V using Tapatalk "

1 Day Ago

Stevo replied to the thread dc-dc booster.
"
Quote Originally Posted by Stevo View Post
http://www.ebay.com/itm/301855582520

Look at this one. Way overkill for your current set up but plenty of room for future expansion. I can't tell what output current will be, but the 24 volts can be boosted up

Sent from my SM-T377V using Tapatalk
http://www.ebay.com/itm/322374615632

Maybe if you wire 20 or so of these in parallel you might be able to get it to work ! LOL

Sent from my SM-T377V using Tapatalk "

1 Day Ago

Stevo replied to the thread dc-dc booster.
"
Quote Originally Posted by Stevo View Post
Sent from my SM-T377V using Tapatalk
http://www.ebay.com/itm/301855582520

Look at this one. Way overkill for your current set up but plenty of room for future expansion. I can't tell what output current will be, but the 24 volts can be boosted up

Sent from my SM-T377V using Tapatalk "

1 Day Ago

Stevo replied to the thread dc-dc booster.
"
Quote Originally Posted by Electro Flyers View Post
Max~50V and 20A

Sent from my SM-T377V using Tapatalk "

1 Day Ago

Electro Flyers replied to the thread dc-dc booster.
" Max~50V and 20A "

1 Day Ago

Stevo replied to the thread dc-dc booster.
"
Quote Originally Posted by Electro Flyers View Post
Off topic, I'm looking for something to take variable V variable A input from a ~1kW PV array to charge a 240-250V battery bank. Would these work in series on the output? Are the inputs and outputs isolated? Any ideas?
At this price I don't think they are, but I'll shoot em an email. What kind of voltages and current are you getting from the solar Panels? Maybe if you send the power from the panels through a stabilizing voltage regulator, and then step it up to the 240 v with that output?

Sent from my SM-T377V using Tapatalk "

2 Days Ago

Electro Flyers replied to the thread dc-dc booster.
" Off topic, I'm looking for something to take variable V variable A input from a ~1kW PV array to charge a 240-250V battery bank. Would these work in series on the output? Are the inputs and outputs isolated? Any ideas? "

2 Days Ago

Stevo replied to the thread dc-dc booster.
"
Quote Originally Posted by markcycle View Post
I had 2 of them self destruct trying to charge 14 leaf modules 114 volts luckily I get a refund
The ones I purchased were rated 900 watt, that's a joke. I set the voltage and current limit so it would put out no more than 600 watts and they blew in 3 minutes - both of them
What were you using for a source.? I had one hooked up to 2 deep cell wheelchair batteries in parallel and the other hooked up to a small 56 v 4amp charger.... both worked fine for 8 hours.
My meanwells just arrived today. These are just for a cheap emergency back up system I didn't have before.

Sent from my SM-T377V using Tapatalk "

2 Days Ago

markcycle replied to the thread dc-dc booster.
" I had 2 of them self destruct trying to charge 14 leaf modules 114 volts luckily I get a refund
The ones I purchased were rated 900 watt, that's a joke. I set the voltage and current limit so it would put out no more than 600 watts and they blew in 3 minutes - both of them "

2 Days Ago

cmcnall replied to the thread dc-dc booster.
" Don't do it! I have tried that exact one and a few others for my 98V chevy volt pack.
Your best bet is 2x 48V CC/CV meanwell 600w power supplies adjusted to the voltage you want placed in series.
The chinese DC/DC boosters are not rated for the load we are putting on them. I even when through the hassle of swapping all the diodes/transistors and caps for high rated versions.
I used 2x HEP-320-48A in my build, they have been solid. I should have bought them instead messing with all the other nonsense. One of those, trying to save money, wastes money things.
-Charles "

2 Days Ago

Hugues replied to the thread dc-dc booster.
"
Quote Originally Posted by Stevo View Post
I'm using a 58 volt dc source to charge 11 leaf modules to 92 volts
Interesting.
But you say you want on-board charging. So that dc-dc module will fit on-board. But what about your 58 volt dc source ? how big is that ? "

2 Days Ago

DRZ400 replied to the thread dc-dc booster.
" Use 3 cheap 36v scooter chargers in series "

3 Days Ago

Stevo replied to the thread dc-dc booster.
" I'm using a 58 volt dc source to charge 11 leaf modules to 92 volts "

3 Days Ago

milton replied to the thread dc-dc booster.
" May be a stupid question, but can you provide some more info on how you would use it? Just curious. Since its DC to DC so it would need a DC source for Charging! "

3 Days Ago