I have a Victron Smart Solar MPPT 250 / 100 charge controller that is connected to a 48 volt battery bank with eight Renogy lead acid batteries.
There are eight solar panels connected in series that give me about 138 volts on average on a sunny day.
The problem that I am having is when I connect my solar panels to the charge controller the voltage immediately drops from 138 volts to ZERO volts.
Can anyone tell me why the panel voltage is dropping to zero when I connect them to the charge controller? How can I fix this problem?