RETNEV

Hi @2una - I have actually checked and for me it works. The BMS activates immediately after power failure and all 3 of my Pylontechs operate through the master. Red alarm led comes on after 3 days again.

Interesting response to Pylontech alarm from company rep. in the Victron community forum https://community.victronenergy.com/answers/50455/view.html The cause of this alarm message：Our battery has a kind of BMS logic：When the battery is not charged or discharged for 3 days，always in idle state. The battery will automatically shut down and go to sleep mode.Only when the battery is charged or discharged again, by then the battery will automatically activate. So when there is a battery to sleep mode and shut down, our Master battery will light up red light and send message to the inverter show there is an internal alarm. （You can check the first three days of the alarm record, the battery will be used once.） What I want to highlight fist is that. This is a normal BMS logic of our battery, to reduce unnecessary self discharge consumption loss of the system.it will not affect the normal use of the whole system or cause damage to the system. So don’t worry. This situation usually occurs when the inverter sets the battery to the backup power supply, or UPS mode. The battery is not used as often, and it is usually left unused after being charged to 100%. The solution： 1.Determine the working mode of on-site situation. If the customer does not want to use the back-up mode, please set the battery has priority over the public-grid to power the load. 2. If the customer only wants to use the battery as a backup power source, The customer can limit the inverter to charge the battery only up to 90% not 100%, so that the battery will not enter the standby state. Hope these information will help. Please let me know if you have more questions.