Dear all,
Could someone give some directions on what could have happened with my battery array?
My system is composed of a 3000W PV array, a Growatt SHP4000 inverter and a 3x Pylontech US2000C battery array.
The system was running without any issues for the last 7 months, yesterday mid-morning the batteries were being charged from an overnight use and at 42% of charge all of them came up with the red alarm LED steady on and a "battery open" message on the inverter display.
From the batteries manual, it seems that this means that they are in protection mode, from the inverter manual the "battery open" says to check the battery terminals.
I disconnected everything and let it rest for 30 minutes to see if something would reset, didn't work.
Additional troubleshooting done:
Cables and terminals were inspected, but nothing was found.
Disconnecting the battery cables to the inverter if I turn the batteries on they go to run mode and operate normally.
I have measured the voltage in each battery module and for each one, I got a 49,5V reading.
If I reconnect the battery cables to the inverter and turn the batteries on without powering up the inverter the batteries jump immediately to protection mode, if I connect only one battery module to the inverter the same thing happens.
When I turn the inverter on a start cycle is done on the batteries but they jump back to protection mode.
The inverter itself is working fine without the batteries.
The batteries themselves seem to also be working fine if they are not connected to the inverter.
Any ideas or troubleshooting tips will be appreciated.
Thanks!
Could someone give some directions on what could have happened with my battery array?
My system is composed of a 3000W PV array, a Growatt SHP4000 inverter and a 3x Pylontech US2000C battery array.
The system was running without any issues for the last 7 months, yesterday mid-morning the batteries were being charged from an overnight use and at 42% of charge all of them came up with the red alarm LED steady on and a "battery open" message on the inverter display.
From the batteries manual, it seems that this means that they are in protection mode, from the inverter manual the "battery open" says to check the battery terminals.
I disconnected everything and let it rest for 30 minutes to see if something would reset, didn't work.
Additional troubleshooting done:
Cables and terminals were inspected, but nothing was found.
Disconnecting the battery cables to the inverter if I turn the batteries on they go to run mode and operate normally.
I have measured the voltage in each battery module and for each one, I got a 49,5V reading.
If I reconnect the battery cables to the inverter and turn the batteries on without powering up the inverter the batteries jump immediately to protection mode, if I connect only one battery module to the inverter the same thing happens.
When I turn the inverter on a start cycle is done on the batteries but they jump back to protection mode.
The inverter itself is working fine without the batteries.
The batteries themselves seem to also be working fine if they are not connected to the inverter.
Any ideas or troubleshooting tips will be appreciated.
Thanks!