Putting an ebike light on a TSDZ2 setup.

[manoz]

Hello all, since winter is here and I find myself riding in the dark more I have considered putting an ebike light on my tsdz2 mid motor build. This Lezyne 800 high voltage looks like it is up to the task. https://ride.lezyne.com/collections...cts/ebike-lite-pro-drive-800-switch-high-volt

Reading the manual brings up some questions though. Can I wire this in parallel between my 48v battery and the motor? The light is designed for motors like bosch and it says it should be wired into the motor.

Will the light dim if I use full assist? I mostly use 1 or 2 PAS and and on occasion use 3 or 4 PAS.

My battery does not have an off switch and the manual mentions avoiding deep discharge, does the BMS that comes in batteries automatically switch off the battery if it drops below a certain voltage? I typically take my battery off and charge it after a ride but I want to know just in case I forget.

Regards

on a side note I bought a cheapo ebike light last year but it wasn't bright at all and just resorted to using a small flashing light on my person which is fine most of the time in a well lit city but occasionally there are dark spots.

 

[E-HP]

Hello all, since winter is here and I find myself riding in the dark more I have considered putting an ebike light on my tsdz2 mid motor build. This Lezyne 800 high voltage looks like it is up to the task. https://ride.lezyne.com/collections...cts/ebike-lite-pro-drive-800-switch-high-volt

Wow, what a ripoff!

 

[Chalo]

https://ride.lezyne.com/collections...cts/ebike-lite-pro-drive-800-switch-high-volt

Wow, what a ripoff!

Well, I've never spent that much on a bike light, but that doesn't necessarily make it a terrible value. Those lights are much better made than the usual Chinese crap, and Lezyne is very obliging with warranty support and spare parts.

For that much money, I'd want a proper headlight beam pattern, though. I wonder why it didn't get their StVZO optics?

Here's a German made e-bike headlight that has better optics and a more German price:
https://www.ebay.com/itm/Front-E-Bike-Light-Busch-Muller-IQ-X-E-6V-60V-DC-150-Lux-IQ-X-M-4-48V-120-Lux-/254215834860

 

[manoz]

Hello all, since winter is here and I find myself riding in the dark more I have considered putting an ebike light on my tsdz2 mid motor build. This Lezyne 800 high voltage looks like it is up to the task. https://ride.lezyne.com/collections...cts/ebike-lite-pro-drive-800-switch-high-volt

Wow, what a ripoff!

I've found it for 2/3 of the price. I probably wouldn't pay msrp for it.

 

[manoz]

https://ride.lezyne.com/collections...cts/ebike-lite-pro-drive-800-switch-high-volt

Wow, what a ripoff!

Well, I've never spent that much on a bike light, but that doesn't necessarily make it a terrible value. Those lights are much better made than the usual Chinese crap, and Lezyne is very obliging with warranty support and spare parts.

For that much money, I'd want a proper headlight beam pattern, though. I wonder why it didn't get their StVZO optics?

Here's a German made e-bike headlight that has better optics and a more German price:
https://www.ebay.com/itm/Front-E-Bike-Light-Busch-Muller-IQ-X-E-6V-60V-DC-150-Lux-IQ-X-M-4-48V-120-Lux-/254215834860

The Lezyne comes with a stem mount which I intend to use and a handlebar mounted switch

 

[E-HP]

For that much money, I'd want a proper headlight beam pattern, though. I wonder why it didn't get their StVZO optics?

Yup, based on the website and videos, the optics don't adjust the beam for use as headlights (circular beam, not a wide flat beam for street use). They seem to be geared more for offroad, where you don't care about blinding folks in front of you.

 

[pwd]

My battery does not have an off switch and the manual mentions avoiding deep discharge, does the BMS that comes in batteries automatically switch off the battery if it drops below a certain voltage? I typically take my battery off and charge it after a ride but I want to know just in case I forget.

Typical BMS behavior is that it will shut down discharge of the pack if a cell falls below a certain voltage; although I would not want to rely on that.

There is a TZDZ2 motor harness that has an option for a light; you may want to look into that because then it would power off with the controller.

 

[manoz]

My battery does not have an off switch and the manual mentions avoiding deep discharge, does the BMS that comes in batteries automatically switch off the battery if it drops below a certain voltage? I typically take my battery off and charge it after a ride but I want to know just in case I forget.

Typical BMS behavior is that it will shut down discharge of the pack if a cell falls below a certain voltage; although I would not want to rely on that.

There is a TZDZ2 motor harness that has an option for a light; you may want to look into that because then it would power off with the controller.

Isn't that just 6 volts though?

 

[pwd]

Yes, I think it is 6V; but that would allow you to use most of the USB (5V) type lights if you find a suitable one.

Sticking with your original light brand: these work on 6V too (as an example):
https://ride.lezyne.com/collections/led-lights-e-bike/products/1-led-emacr-v104s

 

[Elinx]

....
Isn't that just 6 volts though?

Yes, 0,5A, so just 3W light is possible.
If you want a more powered light, the best option is to switch this on/of from battery with a relay on this Tsdz2 connection.

 

[manoz]

....
Isn't that just 6 volts though?

Yes, 0,5A, so just 3W light is possible.
If you want a more powered light, the best option is to switch this on/of from battery with a relay on this Tsdz2 connection.

Really only 0.5A? So that greatly reduces the lights I can use. There is a Lezyne SZVTO which consumes 6W but only compatible for 6-12v so can't connect it to battery directly nor connect it to the controller. That sucks.

 

[Chalo]

Really only 0.5A? So that greatly reduces the lights I can use. There is a Lezyne SZVTO which consumes 6W but only compatible for 6-12v so can't connect it to battery directly nor connect it to the controller. That sucks.

https://www.ebay.com/itm/255049093383

It's not claimed to be StVZO compliant, but it has a headlight-style beam.

 

[Vbruun]

The smart move here is to use the headlight output to switch a mosfet that is supplied from the battery. Then you can have all the power you can ever want

 

[E-HP]

Really only 0.5A? So that greatly reduces the lights I can use. There is a Lezyne SZVTO which consumes 6W but only compatible for 6-12v so can't connect it to battery directly nor connect it to the controller. That sucks.

https://www.ebay.com/itm/255049093383

It's not claimed to be StVZO compliant, but it has a headlight-style beam.

if you do the bulk purchase you can get 10 for less than the other one.