Multiple-Inverter Ac Installations (Stacking) - Outback FX Series Installation Manual

Installation

Multiple-Inverter AC Installations (Stacking)

Installing multiple inverters in a single AC system allows larger loads than a single inverter can handle.
This requires stacking. Stacking inverters refers to how they are wired within the system and then
programmed to coordinate activity. Stacking allows all units to work together as a single system.
Examples of stacking configurations include "classic series", "OutBack series", "parallel", "series/parallel",
and "three-phase" configurations.
Stacking Connections
Stacking requires an OutBack communications manager and a system display.
 If the MATE or MATE2 System Display is used, it must have firmware revision 4.1.6 or above.
 A system of four or fewer units may use the HUB4 Communications Manager.
 A system of up to ten units requires the HUB10.3 Communications Manager.
 All interconnections between the products are made using CAT5 straight-through (non-crossover) cable.
Communications
MATE2 System Display
Figure 21
Each inverter must be assigned a stacking mode depending on the configuration. Modes are described
below. Mode names sometimes vary with inverter model; see Table 5 on page 29.

The master provides the primary output phase. Other inverters in the system base their phase on that of the
master. If the master shuts off, all other inverters also shut off. The master must sense and connect to an AC
source before other inverters can connect.
~ In all cases, the master inverter must be connected to port 1 on the communications manager.
~ In a parallel-stacked or OutBack-stacked system, the master tends to be the most heavily used unit.
~ The selection for three-phase master is different from the single-phase master.
28
HUB10.3
Additional Ports
Manager
OutBack HUB10.3, MATE2 , and MATE3
Port 1 MATE Port
MATE3 System Display
900-0197-01-00 Rev A