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colins avatar image
colins asked

Baud rate conflict 250/500kbit/s - Parallel Quattros-Cerbo-Pylontech-250/100MPPTs-Lynx....

Off-Grid system has 2 x Quattro 48/10000 in Parallel with 24 x Pylontech US2000 & LV HUB, Cerbo GX, Lynx Distribution system inc Lynx Shunt, 2 x 250/100 VE.Can MPPTs ground array, 2 x Fronius 6KW PV Inverters roof array. Perking 12kVA Generator. All kit a few months old. All Firmware updated to the very latest.

Following the Victron documentation Pylontech (Type B cable) to Cerbo VE.Can BMS connections. MPPTs and Lynx Shunt to Cerbo VE.Can connections. Quattros to VE.Bus connections. DVCC enabled, settings as per the book.

Problem: With CAN-bus BMS (500 kbit/s) CAN-profile in the CCGX as per the book, the MPPTs and Lynx Shunt disappear. They reappear if the baud rate is set to 250 kbit/s. Various problems manifesting such as auto-run generator stops working etc.

Am aware that others have had similar issues with the 250/500 kbit/s conflict. Any suggestions how to get round this - thinking switch the MPPTs to VE.Direct connection instead of Can but hate work-arounds and want the correct solution!

Thanks in advance!


cerbo gxMPPT SmartSolarPylontechoffgridFronius
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1 Answer
Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @ColinS

did you read the manual?

https://www.victronenergy.com/media/pg/Cerbo_GX/en/installation.html#UUID-36e56fea-f89d-83ed-3b7c-92632551a2bf


you need to connect the 250 kbps products to the ve.CAN port, and the 500 kpbs to the BMS CAN port

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colins avatar image colins commented ·

Thanks Daniel. We've gone through all the connections and checked against the manual again. The system is working but the Pylontech batteries are not visible on the BMS-Can (Settings/Services/BMS-Can port). Is that normal for third-party batteries such as the Pylontech?

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Matthew Walsh avatar image Matthew Walsh colins commented ·

Hi, did you ever come right with this issue?

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colins avatar image colins Matthew Walsh commented ·

Hi Matthew,

We did resolve it in the end but didn't get to the bottom of what caused the issue - we took everything back to basics and re-installed, replaced some cables, re-set the Pylontechs after a firmware update and it all came back up exactly as it should have done! I would have liked to have gone through each stage, checking as we went but time was against us. Since that install, we've done several more and never had an issue so it could well have been something we messed up originally?

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