Dual Inverter Grid Zero Optics RE behavior

Discussion about the OutBack OpticsRE system monitor

Moderators: OutBack, OutBack Moderator Team

Post Reply
Forum Virtuoso
Posts: 84
Joined: Thu May 17, 2007 8:29 am

Dual Inverter Grid Zero Optics RE behavior

Post by bezalel »

I'll throw this one into the OpticsRE category because that is where the behavior is observed.

System with dual Radian 8048As. Moving the cursor over the OpticsRE Power Flow inverter symbol shows this popup info:

Status Mode Details
Port 1 Inverter State - Offsetting Grid Zero Load 0.87 KW
Port 2 Inverter State - Slave Off Grid Zero Load 1.36 KW, Grid 1.25 KW

The Slave is always shown as Off, even when total loads for each inverter are 3 to 5 KW, morning, noon, or night.
In daytime excess solar production periods the Slave inverter should be supporting loads from the batteries / solar, not taking from grid.
Is 'Slave Off' a normal Status in this situation? The Slave is not acting like it is off. I know there is always some grid use to maintain contact, but this seems to be a strange behavior when the object is to zero out the grid use.

Inverter battery charging is turned off for both, 4 charge controllers handle the battery charging. 12KW PV panelage, 3400AH 48VDC batt set.
User avatar
Sandra Herrera
OutBack Management
Posts: 202
Joined: Wed Jul 08, 2015 8:54 am
Location: Arlington, Washington

Re: Dual Inverter Grid Zero Optics RE behavior

Post by Sandra Herrera »

The slave reporting ÔÇ£OffÔÇØ it is not necessarily wrong, the master will do most of the work until it need assistance from the slave.
If the master is capable of supporting the demand the slave will report as ÔÇ£OffÔÇØ
Could you verify if the MATE3 is reporting the same state?
Sandra Herrera
Applications Engineering

OutBack Power Technologies
Forum Guru
Posts: 119
Joined: Tue Dec 26, 2017 10:52 am
My RE system: 7500W - 2 strings 21x250w, 9 X 250w
FlexMax 60, FlexMax 80
VFXR3048E (2 parallel stacked)
48V 400A - TAB 3 EPZS 375L 2V
MonitorMate, OpticsRE
Location: Romania

Re: Dual Inverter Grid Zero Optics RE behavior

Post by chinezbrun »

any resolution in this post?
same behavior noticed in VFXR master /slave Grid Zero and Grid Tie mode
see also the post viewtopic.php?p=95822#p95822
Post Reply