Hello. I have 6 lithium batteries (2 in series, 3 in parallel) in a 48V system controlled by a Lynx BMS 500. When I left the boat 2 weeks ago, I left the battery bank at 30% SoC and cut all power and switched of the complete system with the main switch.
Now back on the boat, the Cerbo gives me 100% SoC, which is obviously wrong.
In the past I observed that 100% was not really very accurate as it would continue charging for some time after having reached 100% state of charge. But this 70% jump makes me wonder and a little sceptical how reliable the system will be when discharging.
Does anyone have an explanation for this observation?
This is because yo completely shut it down, it does not remember the SOC if you power it down completely so when it restarts, for want od doing anything better it goes to 100%. Thins like the SmartShunt and BMV monitors now have a setting to restart at the SOC it shut down at. I do not know if they are bringing this option out for the Lynx BMS. It might be worth checking the settings to see if there is now anything like Battery SOC on reset as shown for the SmartShunt below or if there is an option to manually set the SOC to a figure you want. I have the NG Version of the BMS and this has the option to manually set the SOC to what you want. Otherwise you will need to do a full recharge and synchronisation to get back on track..
Thank you very much. I can manually set SoC and I can live with that solution. I was just thinking that the Lynx and by extension the Cerbo would preserve that information but absent a small battery that totally makes sense. Kind regards, Aurel
