Zoti wrote: ↑Thu Feb 19, 2026 2:01 pm got a picture of how it works?

Neat, thanks!

Here's an LDU inverter stand I made: https://www.westside-ev.com/s/LDU-Inverter-Stand.stl

Just connect two of them to one of the three metal phase support structures and lay the inverter on its side. Way more stable than vertical.

Hey @MoonUnit,

I designed the current sensor supports primarily to protect the sensors from bending or damage during shipping, they don’t actually “retain” the sensors in normal use. I wanted a way to ship boards with pre-soldered sensors without them being bent/damaged, and this was the best ...

MikeNotts wrote: ↑Sat Aug 30, 2025 3:34 pm Does anyone have anymore views on this approach to reverse a ldu ?

I’m at the point of thinking I want to cut my busbars, but obviously this would better if it works.

Any thoughts appreciated - Mike

Confirmed this works well on the bench! Be sure to swap the two inner encoder pins as well.

Hey there, Westside EV is the shop i mentioned in my comment if you are in LA im actually in Orange Country "Irvine" i would like to get together and discuss what sort of support/ collaboration we can work together. since Im offering and helping over HW and you are mainly dealing with HW selling ...

I know I’m a bit late to this thread, but I wanted to chime in. Things have been hectic with several ongoing projects and expanding my business into new services and platforms. As a result, OpenInverter has gradually become a smaller part of my work at Westside EV .

That said, I still plan to offer ...

You definitely don't ever want UDCSW set to 0. For a 48V bench test, I would set it to ~38V. Setting it to zero will allow the main contactor to close before the system has precharged, which is dangerous and can damage the inverter.

Can anyone please clarify what pins A6: OUT1 - HV Enable and A10: D2 - 3p are for?

The wiki mentions the OUTs are low-side connections to control a relay for the relevant signals. OUT2 - AC Present sounds pretty self-explanatory, but what does HV Enable mean exactly? Is that an output signal when ...

LRBen wrote: ↑Sat May 24, 2025 7:22 pm I tried this with an LDU a year or so ago. Inverter made some unhappy noises so I didn't try for very long as I didn't want to blow up the LDU either.
Decided not to pursue it much further given how old the LDU is these days.

Did you also swap the encoder wires or current sensors?

I had a bit of a crazy idea and figured I'd post here in case someone knows whether this could actually work.

A client of mine wants to switch from OpenInverter to either EV Controls T-2C or Dynam Labs VCU+ for his LDU. I explained that he’ll need to reinstall the original Tesla logic board, and ...

@Romale did you ever figure out the issue?

I just made a new batch of five LDU V6 boards, and one of them is getting a HICUROFS2 error. However, despite the error, I can still put it in "Run" and spin the motor.

I see 2.37V at the test point next to IC9 and 2.31V at the two points on the bottom ...

My understanding what that the front and rear SDU were basically the same, with different casings to accommodate the different locations.


The firmware definitely differs because the RSDU units require a throttle and brake input to operate. In contrast, the FSDU can be controlled entirely via ...

That part number matches my 2017 model x front drive unit


Yeah, I’ve reached out to a few people via email as well, and they’re all saying the same thing—it seems that all (or at least many) FSDU and RSDU logic boards share the same part number. Does that mean the hardware is identical, and the ...

Is there any reliable way to tell whether a Tesla OEM Small Drive Unit (SDU) control board came from a Front SDU (FSDU) or a Rear SDU (RSDU)? I've collected several OEM logic boards over time and, unfortunately, lost track of which ones came from where. I know I have a mix of both FSDU and RSDU ...

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 ...