Schneider 6848 Intermittent operation

[jarodz007]

Hi there.. I have one Schneider 6848 and two MPPT 20 150 Charge Controllers, including a battery bank (20 KW) and 18 solar panels (345w ea).  My system is net metering with the local Power Company.  The system is working Ok, but I'm having an intermittent problem with the Inverter.  At least once a week, I found the system Off (meaning that the display either shows - - - or 000).  Then, I turned Off the Inverter breaker for a couple of minutes and turned it On again.  In most of the cases, the inverter re-starts and keep working Ok, but in the other cases, inverter starts generating but did not keep it steady.  It starts to click (that's what I heard) and the reading do not stabilize.  It's keep going up and down on the readings (that's when the clicking happens).  If the system does not stabilize, eventually the inverter stops and all can see in the display are three dashes (- - -) or 000.  Do you have any idea what's the problem?  Regards,  Jose