Hi everyone,

I wanted to make you aware of some harnesses I’ve been working on that might make your EV projects a bit easier. I’m now offering fully labeled pigtails/harnesses for both Tesla Small Drive Units (SDU) and Large Drive Units (LDU).

Tesla SDU Harness : These 1-meter pigtails are ...

link
I dunno, I see lots of options under $100. Maybe we're getting different results based on our location or something, but this is in S. Carolina, which is pretty close to you. $75 free shipping is a pretty good price for OEM axles.

Have you tried eBay? Lots of used axles under $100 w/free shipping in USA. Lots of cables too. Contact the sellers outside of eBay, they will often give you a better deal, especially if you can pick up locally.Where are you located?

johu wrote: ↑Sat Jan 04, 2025 12:23 am Here https://openinverter.org/wiki/Tesla_Mod ... 5_Software

Thank you!!!!

I know I'm a bit late to the party, but where exactly is this legend/Rosetta Stone on the wiki ? I see a screenshot of some parameters, but I don't see any definitions for what each parameter is or how it's used. Is this information documented anywhere?

I've been going through the wiki, support ...

Pardon my ignorance, but is your goal to connect the motor directly to a driveshaft (or "prop shaft," I believe it's called across the pond) in an RWD vehicle? So, like a baby Revolt Systems crate motor?

Has anyone used the small rear drive unit from a 2019-21 Model S or X? These are from the Long Range Raven package and they look identical to pre-Raven, 2018 and older rear SDUs except with an external oil filter and pump. There are multiple sources online stating that these are AC Induction ...

FYI - Damien just dropped a couple of videos today discussing the new VCU v2.20A firmware. He also uploaded the parameter sets he's using with the VCU and LDU in the Panzer, which might provide some insight.

https://www.youtube.com/watch?v=wjlucUWX_lc
https://www.youtube.com/watch?v=-UsmRgXBFgo ...

Edit: Ah, and here's the post from the man himself: https://openinverter.org/forum/viewtopic.php?p=27697&hilit=charger+pin+missing#p27697


Right on, thank you. If only I had searched using the same terminology I used in the title of my post! :) Once again, proving life is all about finding the ...

Picture from wiki showing unused pin. https://openinverter.org/wiki/File:Gen2_Charger_V5aB2_logic_board.jpg


Thank you! Somehow, I missed that in the pic!


Can confirm, mine is the same way. I found a mention of it somewhere on the forum, as I recall the connector got changed due to ...

I purchased a Gen2 Charger board and ordered all the connectors mentioned in the wiki . However, the 30-pin SAMTEC IPS1-115-01-S-D-PL is missing a pin in the corner. According to this thread on DIY Electric Car forum, the connector part number should be IPS1-115-01-L-D , which has all 30-pins. Is ...

Thats why any critical connection I paint pen mark them once done. That way I can always see before putting the covers/caps on if I done the step. Specially handy too to check is no-one opened something after it left your shop.


Yes, normally, I do that once I button it up for good. In this case ...

Since you had the case open, triple check that you rebolted the motor connections.


OMG. That was totally it! I've never been happier to be so dumb. Thank you!

I remember now that I started them by hand and got a phone call, which distracted me, and I never came back and torqued them down ...

It seems between the parameters and the spot values you have changed boost or udcnom? Because boostcalc is 29330 and expected is around 8000. But probably it is not the issue.

Yeah, I tinkered with the boost a little, but it didn't help. I have since gone back to the base 1800 value.


I see ...

So all three control boards work in one LDU, but not another? Do they work in another LDU with the same input voltage/source you are using to test this one? Also, when you power up the trouble LDU, do you see a red light on any of the gate drivers?

One other item (maybe should have been first) I ...

I'm having trouble getting an LDU to spin.

It's in Run mode and set to Forward direction, but when I apply throttle, nothing happens. I’ve calibrated the throttle, and when I plot it, it maps smoothly to the throttle angle. However, the current remains at 0, and the voltage remains relatively ...

Couple ideas:

0) Fix the parasitic drain issue.

1) Use a solar panel-powered "tender".

2) Use an Arduino/MCU in "Deep Sleep" mode to wake up every n hours and check the 12V battery level. If it's below a certain threshold, wake the car up to top off the 12V. Be sure to handle low HV battery ...

How-to video for the oil pump mod itself:

i modified mine to use a external bms, very time consuming and expensive.


Yeah, I'm trying to avoid going that route myself, but I'm glad you got yours working.

These BMSs are about the same price, but I'm leaning toward the WDR because automotive is clearly mentioned as an application, and ...

I picked up some Porsche Taycan modules for a good price. Does anyone have any experience with or thoughts on these BMS systems?

• https://www.sarperonal.com/product/high-voltage-bms/

• https://wdrautomatisering.nl/shop/gatew ... m-edition/

Any others I should consider?

Ah, ok. Should I just put one of these at each of my two battery boxes? Do I even need the fuse box, or can I just wire them without?


I would put a fuse in each battery box as close to the cells as possible, connected with bus bars, so the chance of a short in-between the fuse and cells is ...

Hi,
I was hoping someone could recommend a fuse for each of my battery boxes. I will have two boxes, each with 5 x 39v LIfePo4 modules, in series to make a total of 390v fully charged at the motor (SDU). Currently I have a Tesla harness with the Pyro Fuse and box/connectors/long cables. I don't ...

Leveraging the HVIL sounds like the ideal approach, but simply switching the car to neutral is much more straightforward and most likely "good enough" from a practical standpoint. I would maybe later add a separate Arduino/controller to detect the inertia switch, wait for the car to stop, then send ...

I would read through this thread carefully:
https://openinverter.org/forum/viewtopic.php?t=3564

Several solutions are proposed, including having the inertia switch put the car into neutral, adding a capacitor + diode, using software (E.g., Arduino, etc.) to perform an intelligent "emergency ...