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  1. Ravi Kempaiah

    Why Charge to 80% and the use of smart BMS in Zen 52V,20Ah UL-2271 battery

    One of the features that we have implemented in our Photon Pro and Ultra bikes with 52V, 20Ah batteries is the smart BMS with the adjustable limit for an increased lifetime. These modes can be changed with the simple click of a button on the control display. I don't know of any other E-bike that...
  2. Ravi Kempaiah

    Logistics - what a pain!!

    One of the most challenging things our team has been dealing with for the last 8 months is logistics into and out of Canada. Our sincere thanks and gratitude to all customers who have been so patient and cooperative. Back in late April, our large shipment of bikes to the US got stock because...
  3. Ravi Kempaiah

    * Attention Juiced Bikes Community *

    This message was posted on the Juiced Bike Owners group on Facebook, and my post was deleted for some reason. Given the liquidation of Jucied assets, the last thing anybody wants to see is thousands of bikes becoming heavy paperweights without proper support. This negates the whole premise of...
  4. Ravi Kempaiah

    52V, 20Ah Downtube Battery pack Design Feedback

    Our new 52V, 20Ah battery design would provide an excellent alternative for Hailong, Dolphin, Shark / DP-5 from Hailong, and other cases normally found on DIY E-bikes. People in the DIY world deserve a well-engineered battery pack. I am curious to hear from EBR readers about the color scheme...
  5. Ravi Kempaiah

    UL-2271 certification for Zen 52V, 20Ah batteries

    Zen team is excited to share the UL-2271 certification for our batteries. We take safety and E-bike battery quality very seriously and we invested significant capital to ensure our customers can charge their batteries without worrying about safety. Recently, E-bike battery fires have caused many...
  6. Ravi Kempaiah

    Bafang HQ Visit from Zen Electric Bikes team

    We had an opportunity to visit the Bafang HQ and spend 2 days visiting their facilities, test riding E-bikes, and talking to their R&D team. There is so much to unpack, and we will share videos and articles in this thread. What was surprising to hear was that the son of Bafang company's...
  7. Ravi Kempaiah

    Bafang BBS-02/HD vs M600 vs M620 (Ultra)

    I hope someone here with experience can share a detailed report with pictures on the differences between the legacy drive system from Bafang, like BBS-02/HD, with the latest M640 (Ultra) and M600 motors. This will help forum readers benefit from the collective knowledge of more experienced...
  8. Ravi Kempaiah

    Serial 1 from Harley Davidson sold to LEV manufacturing/ Life EV (formerly Prodeco Tech)

    In a strange turn of events, Serial-1, an E-bike spin-off from Harley Davidson, has been sold off to LEV manufacturing. LEV Manufacturing was formerly known as Life EV, which sprung from Prodeco Tech (one of the earliest E-bike companies in the industry). This sale shows the difficulty of...
  9. Ravi Kempaiah

    Complete Details of Zen Mid-drive Motor - 500W (900W peak) power, 120Nm torque

    We had received several questions regarding the motor we used on our photon bikes. So, we would like to share some details here. Why this Zen custom motor? When we first released our Samurai model with the Bosch Gen-4 motor system, people really liked the motor but we often received requests...
  10. Ravi Kempaiah

    Zen Photon Ultra - limited version (Bafang Ultra, Rohloff Speed hub, Gates belt drive)

    To this wonderful EBR community, we wanted to let you know that our team is building a few units of this very special bike - Zen Photon 'Ultra'. This E-bike is based on our Zen Photon platform but uses the Bafang Ultra motor and Rohloff 14-speed hub along with Gates belt drive - hence the name...
  11. Ravi Kempaiah

    Fully Charged Canada - Vancouver Sep 8th to 10th

    Zen team got to hang out with some of the best in the industry at the Fully Charged event in Vancouver. It is impressive to see how Grin technologies serves the market with their unique products. Some interesting Cargo E-bikes (locally made in British Columbia) Lots of test rides and...
  12. Ravi Kempaiah

    New cell sizes and cell chemistries - going from 2170 to 4680 and beyond

    Ever since the Tesla battery day, the whole battery industry has been working hard to develop better cell structures and chemistries - 4680-sized are going in the new Tesla Model 3 and Cybertruck but I don't think we would see such that in the E-bike world any time soon. These cells are MASSIVE...
  13. Ravi Kempaiah

    Zen Wave - [750Whr] battery, [500W/65Nm] motor, Torque sensor w/throttle, 4-piston brakes, USD 2199 / CAD 2999 [Pictures and specifications]

    We are excited to announce - Zen Wave, the latest E-bike from Zen. Initially, we introduced our flagship Samurai models, but they are in the higher-end category, and the market is geared towards $2.5K bikes rather than $4k or $5K bikes. So, with this Zen Wave, we can bring some of the latest...
  14. Ravi Kempaiah

    Dual Battery Balancer circuit - experiences!

    Public Safety Announcement (PSA): The dual battery function is a favorite among many riders, and being able to connect 2 batteries and extend the range is an excellent feature. This is one of my favorites too. Bosch has implemented this in an excellent manner, and it works very well. But, I...
  15. Ravi Kempaiah

    Zen Photon - [1000Wh] battery, [500W/120Nm] Torque-sensing motor w/ Throttle, USD 3799 [Pictures and Specifications]

    We had a lot of requests for a bike with a belt-drive and Internal gear hub combo (low maintenance), a long-range battery, and a torque-sensing motor with throttle. So, we created one - Zen Photon. As we set up a battery manufacturing facility in Canada, it will help us offer higher-quality...
  16. Ravi Kempaiah

    Brose releases 48V system motor and a concept motor with an integrated stepless gear system

    Interesting developments - https://ebike-mtb.com/en/brose-drive-3-peak-motor-48v-system-and-concept-drive/ Now, we have three contenders in the integrated motor + gearbox category. Valeo - Cyclee Pinion - MGU Brose - Peak3
  17. Ravi Kempaiah

    Bafang Ultra + Rohloff combination - User feedback requested

    Hello EBR team, If you have any experience (short or extensive) with Bafang Ultra motor + Rohloff Internal Gear hub, then please share your experience in this thread. A prospective client here reached out to us to build a fleet of E-bikes with Bafang Ultra + gates belt drive + Rohloff hub. It...
  18. Ravi Kempaiah

    The passing of Mr. Rohloff - end of an era!

    Mr. Bernie Rohloff, the founder of the legendary gearbox company - Rohloff, has passed. A truly remarkable engineer who designed one of the most loved, iconic gearboxes for cyclists worldwide. 🙏With love and gratitude from all the cyclists around the world.
  19. Ravi Kempaiah

    Bafang IGH for Fat bikes - capable of handling 750W power

    This new 5-speed (internal gear hub) IGH from Bafang is designed to handle up to 1000 W and can handle 750W continuously, making it a suitable IGH for the Bafang Ultra motor. Our partner in Asia is testing this unit before it can be deployed in mass production. Let us know if you have any...
  20. Ravi Kempaiah

    How does an E-bike charger work? [ Video with Animation]

    The safety of an E-bike battery is intricately tied to the quality of the charger used. With millions of E-bike chargers on the road, it is important to understand how E-bike chargers work. We put together a video to explain the mechanism like CC-CV, what is a smart charger and how to select the...
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