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Tip: Donât use a 200A fuse - a dead short will smoke your cells as well.
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Tip: Donât use a 200A fuse - a dead short will smoke your cells as well.
Itâs fused at 125A
Hello,
I have a new install that is having false low-battery alerts from the Multiplus2 with JK Inverter BMS, connected ve.can.
During that time I had a fully charged 24V battery (8 X MB31 with JK Inverter)
The VE Configure alarm values are set well below the Battery Voltage at that time.
These low battery alarms are false-positive, and coming from the Multiplus 2.
Can anyone suggest where I should look?
Great!
JKong has fixed the charge flaw and removed the stupid timer in the latest Beta firmware.
What is the MP2 model, firmware version & Venus OS, Installed assistants?
What is the length of the DC cable, cross-section, are there any losses on it?
Go through the entire topic and take measurements.
UPD: This topic is closed and the issue raised in it is resolved. I think you should create a new topic and describe your case in detail, giving detailed information about your installation.
Iâve determined the low-battery alarm is consistent with rebooting / turning off the Cerbo GX. I guess that makes some sense, as with the cerbo turned off, there is no nothing to monitor the charging.
Iâm confused on the statement âthe topic is closedâ. Is this not a community forum? I do not see any indication of topics being âopenâ or âclosedâ.
The original topic was closed, simply because the issue that the OP had has since been resolved. Greatly by the help of @Diessel Who also mentioned to open a new one for your problem. No worries. Iâm pretty sure that he wil help you as well
A few days later I have the issue that dess doesnât charge to 100%, the absorbtion voltage is never reached. When I set the minium soc to 100% it does reach the absorption voltage and 100% soc.
This causes a soc drift and can cause a low battery alarm after a few weeks.
Whatâs wrong?
What version of Venus?
Without DESS, do you achieve SOC 100?
Software version is v3.70~6
I disabled dess, charging right now, let you now.
A reminder that there is a dedicated DESS section on the forum:
Thank you, I will continue there if dess causes this issue.
Okay, after disabling dess the battery is charged to 100% soc and stays in absorbtion mode long enough.
So itâs dess related.
Welcome to the DESS club
I noticed the same behavior since upgrading to v3.70~5. It seems that DESS changes the target SOC more frequently now. When the batteries are to be charged to 100%, the target SOC frequently changes between 99% and 100%. When it is at 99% around the end of the absorption phase, the battery may not reset to 100% and start another bulk phase. I already reduced the absorption time, but still had a few days where the battery could not reset the SOC to 100% before the discharging started in the evening.
I made a topic for this: