Hi community
I have the Lynx Smart BMS managing two paralleled Lithium Smart Batteries and connected to some 12V consumers (all in an RV). Batteries get charged via a buck boost when driving.
Two weeks ago I returned home after many hours of motorway driving and the batteries were 100% charged and well balanced/cycled.
Then I switched the Lynx to standby mode via Victron Connect app, the contactor opened and only Bluetooth of the BMS remained enabled, so system in low power consumption.
Last weekend I drove the vehicle and left BMS in standby mode - so neither charge nor discharge was occurring. Reason is that the buck boost is yet NOT connected to “Do not charge” signal of BMS - that’s why I use BMS soft standby mode, which opens the contactor, to avoid charging on low battery temp - which was the case last weekend here at home in Sweden…
Now, today, i.e. after 11 days in standby mode, I see the BMS being in Hibernate mode (not Standby anymore), and when toggling the Mode-switch in Victron Connect app from Standby to On, nothing happens. Neither precharging nor contactor switch to close circuit connection. After a while the Mode-switch in the app automatically returns to Standby.
Battery temp today is 11C (I.e about Charge allowed at 5C) and battery charge level 69%.
Is this a bug in the software or may there be a reason for why the BMS does not activate the system as usual?
Or is it not foreseen that hibernation mode can be ended via Victron Connect app?
The only thing I can think of is that in the last days the battery was below 5C - but now is again above. I do also think that charge levels/cell levels have not been at undervoltage due to low temp - because it is now at 69% level and 13,3V.
In the Lynx BMS operation/troubleshooting manual https://www.victronenergy.com/media/pg/Lynx_Smart_BMS/en/operation-lynx-smart-bms.html I do not find this specific case covered, it only refers remote on/off switch and does not mention Victron Connect soft standby…
Right now my thought of solving this is “hard reset” by disconnecting and reconnecting the battery from the BMS to power up the BMS from totally disconnected state…
Any hints/tricks/tips are highly appreciated.