Yet another CRF 250 Build but its my first so... ;)

[DonCox]

The main reason a lot of us do 72V is because the convenience of the parts. More controller options in 72V, like Votol. They do not have a 96V EM260S. There are Aliexpress stores that sell them, but I emailed Harry at QSMotors.com and they say there are no 96V EM260S controllers. Batteries are more available, most motors can run 96V, but really a 96V rated controller has to be good to 120V approx. The important parts in the controller are the Capacitors and Mosfets. They are voltage rated.
But I started 48V and went 72V about 5 years ago. Almost all my stuff uses the same chargers. Even my MX500 is 72V. I am now building a street bike , a KTM Duke 790, and putting in a QS138 90H V3 motor with a FarDriver controller, ND961200, and of course a 96V (nominal) battery.
Higher voltage is better for many reasons, but higher voltages, like the Stark and KTM Freeride run 300+ Volts get to be dangerous!!!!
I prefer the Votol Controllers, because I can work with them, but you are limited to 72V nominal. I wanted to put the 96V Votol EM260S on the Duke, but I wanted a reliable controller. That is why I contacted QS Motors. The sites that sold the EM260S 96V model had vague info. They would not state the Max voltage, that should be over 110V. I must now learn the FarDriver software.

 

[halg]

The main reason a lot of us do 72V is because the convenience of the parts. More controller options in 72V, like Votol. They do not have a 96V EM260S. There are Aliexpress stores that sell them, but I emailed Harry at QSMotors.com and they say there are no 96V EM260S controllers. Batteries are more available, most motors can run 96V, but really a 96V rated controller has to be good to 120V approx. The important parts in the controller are the Capacitors and Mosfets. They are voltage rated.
But I started 48V and went 72V about 5 years ago. Almost all my stuff uses the same chargers. Even my MX500 is 72V. I am now building a street bike , a KTM Duke 790, and putting in a QS138 90H V3 motor with a FarDriver controller, ND961200, and of course a 96V (nominal) battery.
Higher voltage is better for many reasons, but higher voltages, like the Stark and KTM Freeride run 300+ Volts get to be dangerous!!!!
I prefer the Votol Controllers, because I can work with them, but you are limited to 72V nominal. I wanted to put the 96V Votol EM260S on the Duke, but I wanted a reliable controller. That is why I contacted QS Motors. The sites that sold the EM260S 96V model had vague info. They would not state the Max voltage, that should be over 110V. I must now learn the FarDriver software.

That is confusing about the 96v EM260. Thanks for the reply Don. I contacted Russell at siaecosys/cnqsmotor.com in late Feb. He gave me a different response.

Finding the correct vendor for these motors and controllers was VERY confusing and difficult for me at first. There are multiple web sites with 'siaecosys' and 'qsmotor' in their name with varying spellings and such. I selected cnqsmotor.com as they had a presence on Endless Sphere DIY EV Forum and there was a lot of good feedback about them there.

EDIT: Don has been doing this way longer than I have so his contacts are more likely to be accurate. If it seems like I was implying Don had the wrong vendor I was not.

I will follow up with him again as it will impact my next build if I can't use the same or a similar Votol controller at 96v.

Here are his responses in the email chain.

 

[Sipma02]

Interesting, that makes sense. 96v does seem like the way to go if you can source the parts. As this will likely be a project I start in a few months, maybe there will be better availability by then!

 

[DonCox]

That is confusing about the 96v EM260. Thanks for the reply Don. I contacted Russell at siaecosys/cnqsmotor.com in late Feb. He gave me a different response.

Finding the correct vendor for these motors and controllers was VERY confusing and difficult for me at first. There are multiple web sites with 'siaecosys' and 'qsmotor' in their name with varying spellings and such. I selected cnqsmotor.com as they had a presence on Endless Sphere DIY EV Forum and there was a lot of good feedback about them there.

EDIT: Don has been doing this way longer than I have so his contacts are more likely to be accurate. If it seems like I was implying Don had the wrong vendor I was not.

I will follow up with him again as it will impact my next build if I can't use the same or a similar Votol controller at 96v.

Here are his responses in the email chain.
View attachment 13637

View attachment 13638

Hal I have seen them advertised on Aliexpress, but not by an reputable store. the Siaecosys store, Dun Store, QS Store They do not give the Maximum Voltage. 96V is nominal voltage. I would love it if we could use Votol. I am very comfortable with Votol controller

 

[fmxxx666]

@Dave Daum I am finally done with my Battery Cage (kinda proud how it came out )




so I can call this Build finally "Complete" as I am not currently thinking about changing anything.


off to the next project but thats off topic as I have to turn this little trailer into my toy hauler
>

time is rar so the most common times I can go to ride is like a wednesday after work when I leave an hour earlier.
So I cannot afford loosing time with loading everything up.
This Trailer should be ready packed with all I need ready to go for a ride just hook it on and go to the track.

idea scatch:


Should be able to house 2 bikes as I am gabmling with the idea on getting a 2smoker next season (probaply KTM SX 150 or 250)
Bikes will be secured with Moto Cinch System on L Tracks.
Rest of the Space will be filled with an Aluminim Profile 40x40 Nut 8 rack with a few boxes to hold all the miscellaneous items you always need on hand.
Additionally
-Holder for the Ramp
-12v battery and charger (maybe solar) to power LED´s, Coolbox, compressor.

 

[bananu7]

Consider the peg-grabbing mounts. A couple of my peeps around here have them and they're quite quick and reliable. In a trailer you won't even need extra straps, I think.