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The HPC Trailblazer I ordered comes with the motor in 52v firmware and they say it's rated at 1800w max. They build their own batteries so I'm guessing they are using a 35a bms. Perhaps a custom firmware for the motor? If it's in 52v mode already would your tool help me be able to run a 48v...

Got it, so basically as it's setup up I COULD run it with the 48v but it would just cut out with like 35% still left on the battery right?

Question for you all, building up an hpc trailblazer with the m560/52v battery and wondering if I can use a 48v battery with it also and have it not cutoff early? Is there a way to switch between 48v and 52v with the DP C245.CAN display? Or maybe with the Bafang app?

How did you get on this list?

So I tried an ideal diode and still got the same error, so its definitely not an issue of the main battery discharging into the external. The external I have can be charged from the dc port or the xt60 discharge cable so thats not the issue either. I remembered I had another smaller 10s2p pack...

I get it. As I said I have quite a bit of experience running lithium batteries in parallel. A parallel switch won't work with the bosch system because the controller won't give any power to the motor if the bosch battery isn't supplying current. I'm thinking of installing an ideal diode on just...

I understand your concern and appreciate it. I have been working with lithium batteries for over 10 yrs and have built several of my own packs from 18650, 21700 and originally a123 cells. I have also been working with lithium polymer packs and discharging/charging them in parallel for over 10yrs...

Not sure what you are looking at, but I didn’t connect into the charging port, I connected into the red and black wires on the big plug that goes into the motor 👍🏼

I'm more so wondering if the motor/controller are built for higher wattage than they are rated (I know bosch gen4 cx performance is rated at 250w but can go much higher at peak power) and the fact that I have 2 batteries in parallel, each with their own 30a bms = 60a potential now, could allow...

But you are right, could still be a voltage sag issue under load either way. My intuition tells me it is the opposite though and the motor is able to draw more current than it normally would OR the system is detecting some extra voltage from the external somehow. I know this can happen with...

Ok, but the system still has the original battery in parallel to supply needed voltage always, so theres never a time when it doesn't have that power available as far as I understand.

Yes, both 36v and I thought the same thing and why I was hesitant to try it in the first place but decided to go for it as Psaibot had success. Again, the only time I got the error was when I was climbing in turbo mode on a steepish grade so in my mind it has to be connected to that extra load...

When I unplug the external battery, I dont get the error anymore. I didnt really do anything to the existing wiring, just "tapped" it with the posi tap which is rated for more current than the existing wiring and the external battery has bigger gauge wire than the Bosch Motor wires.

Ok, so I have been wanting to do something like this since I first got my niner wfo e9 (same bosch system as the cube) and after the inspiration and motivation from @PSaibot I decided to go for it. Instead of splicing and soldering to the motor wires, I wanted a removable solution so I went with...

Got it, thanks again. I'm guessing what is attached to that wiring harness there is an "ideal diode" so that current cant flow between the batteries. Shouldn't be an issue unless there is a discrepancy between voltages though right? *or maybe it's a fuse

Wondering how this is currently holding up...any errors or issues in general? I would like to take this on but thinking of using Bosch's own dual battery y cable to create a removable solution. I know I saw another forum member (@TrailwattsUK) testing a range extender set up for bosch that used...

Great work @PSaibot ! Was wondering how/where exactly you connected to the motor? Also, do you charge both batteries through the normal charging port or you charge the extender seperately? Thanks!

Hi there! Saw your write about about adding an extender on your cube with the Bosch system. Great work! Was wondering how/where exactly you connected to the motor? Also, do you charge both batteries through the normal charging port or you charge the extender seperately? Thanks!