also dont forget the box has two of these amphenol powerlok connectors you can just unscrew from the front

Gigavac P125BDA, Ohmite AZ101KE 100 OHMS, and 3A Fuse

This unit is by far the handiest. This professionally designed and soldered board includes a precharge contactor, fuse, and resistor. If you want your contactors to last a long time, you need to precharge the capacitors in your equipment ...

I made a crappy flow chart to summarize my proposed approach, each step has a number in order


image.png

as well as open questions and known limitations so far
image.png

a key piece of info is the documentation for the aem ccu, the "official" combo obc and dcdc converter for the aem ...

Update, as of current controller firmware and for the foreseeable future, the pcs isn't controllable over CAN. It also absolutely MUST be connected to the j1772 cp and pp pins at all times.

so for this all to work, the bms-18 will need to be configured to not need the cp and pp pins, and instead ...

Try getting this information about your PCS the next time you have issues

https://openinverter.org/wiki/Tesla_Mod ... eking_help

Gonna keep finding PCS' on ebay and posting model year + what i think are the part numbers, a pattern may yet emerge

also shoutout to donut auto parts near Sacramento CA, these guys label the hell out of their stuff

2018 [00-C]
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2020 [00-C]
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2021 [04 ...

i'm attempting to bolster the wiki page for the sake of making pcs troubleshooting easier and more specific

for one, is this sticker on the top of the PCS some kind of market indicating hardware revision? or just a production serial number?

This is on my PCS, out of a 2020 model 3, my working ...

check this section of the PCS wiki page, and add the requested information to your post, it'll be really helpful to diagnose what's happening
https://openinverter.org/wiki/Tesla_Mod ... eking_help

Looks like damien didn't actually give up on the pcs, it's just when issues arrive, sometimes posts about issues don't contain enough specific information, and the overall problem is tesla keeps changing can messages between firmware versions of the pcs, so its just a matter of finding what changed ...

I'd be curious what the logs look like when that's happening, maybe voltage rises too slowly or something, assuming the controller has the ability to do logs

also check this section of the wiki page, and add the requested information to your post, it'll be really helpful
https://openinverter.org ...

I'm using a Chevy Bolt charger and DC-DC,

First I'm hearing of the bolt charger usee in a conversion, and pwn control sounds dead simple to set up, but I can't find any documentation or threads about it? Did you just buy one and start messing around or is there some documentation somewhere on ...

checking in as someone who bought a PCS and am pretty excited by the possibility (cheap in junkyards, excellent specs)
It sounds like a huge problem is firmware variability but are there more than a couple hardware revisions?
is it possible to just flash the boards to a fixed firmware rev?

out of curiosity, aside from this issue do you have a working PCS in your build which charges at full power (not stuck at 2kw)?

getting back into this, can damien's controller deal with being "told" to start charging without seeing the CP and PP pins?

it looks like the aem bms really wants to be entirely in charge of charging, and basically just bark orders at the OBC to start and stop on a dime

image.png

the signaling ...

i got a response back from an AEM tech in relation to a different question about balance charging, and his response seems relevant to this

To start off, the VCU will only command the BMS-18 to balance cells while charging and when conditions defined by VCU BMS logic and user calibration parameters ...

Damien mentioned commissioning a printed housing for the controller back in the main support thread but did anything ever come of that?

For others using the board, what did you use for housing?

Ok yeah, just got the correct plug and it's the same issue

I can correct for this by drilling the right side clip hole wider, but still this is a board design issue, I'm not sure the best place to let Damien know though? Just an email ? Make a comment on the GitHub?

PXL_20230124_210833979.jpg ...

:Yeah I discovered that only an hour later, gotta get the black connector now regardless then

However that still leaves the mismatched holes on the board, unsure if I should just snap off the clip piece for the side that doesn't align and let solder hold it in

Was a 3d printed housing for the ...

Correction but also maybe not?
Double checked the pin and connector part numbers from the v3 folder on the GitHub
https://github.com/damienmaguire/Tesla-Model-3-Charger/blob/master/Controller/V3/PCS_Controller_V3Pinout.pdf

Looks like it's supposed to be 776163-1, not -5
HOWEVER I checked the data ...

Just got a shiny PCS controller board v3 from Damien through the open inverter shop

I believe I got the amp seal connector version of the board because good lord the lead time on the cinch connectors is not ok

I got the amp seal connectors based on the recommended part numbers
770854-1
776163-5 ...

Starting a thread to ask some questions, I'll be updating this as things become clearer and hopefully have a full guide one day

First question:
The M3 PCS needs to see the CP and pp pins on the j1772 port, as well as of course see L1, L2, and PE (gnd)
image.png

However the bms-18 master also ...

Incoming dumb question that I didn't think would be appropriate for the support thread;

Could this setup play nice with the aem vcu200? They like certain on board chargers but I wonder if the expected can IDs for specific values from the obc can be changed, so it's getting the same message.

Not ...

Not sure if it's in here but, has anyone identified what the C rating on these batteries are? I'd be doing four parallel strings of 6 most likely, and want to put them being a model s performance rear drive unit, and I'm wondering if the batteries could handle that

More like many want it but few are even a tenth of the way qualified to do the dissection.
Again, spreading this raffle more widely would help a lot

interesting idea, you might get more traction if you post about it outside this forum though.
I'd participate but i'm still unsure if i'm going to use a M3 motor in my project, and shipping a motor from ireland to the usa is going to be killer
then again, even with shipping it'd be like $1000 usd ...