OutBack Power Programming Guide

ManualsBrandsOutBack Power Systems ManualsMeters & CommunicationsOutBack Power System Display and Controller

I-9. Inverter Stacking

This menu contains settings to coordinate, or “stack”, multiple inverters. Stacking assigns an inverter to a

particular phase or output. Any inverter connected to an OutBack HUB product must be designated as master

or slave of some type. Stacking configurations and other details are discussed in the inverter literature.

The Change soft key enters a new series of screens. The inverter’s output is disabled as shown below.

This prevents phase shifting and other problems which can arise from inverters remaining active while their

programming is changed.

I-10. Power Save

Ranking

Each inverter uses power

while it remains on, even if it

is not inverting or charging.

Power Save can put slave

inverters into Silent mode.

This mode minimizes the idle

consumption. The inverters

will come on again when the

loads require power.

CAUTION: Equipment Damage

Ensure the inverter outputs are turned off, or disconnected, before programming.

Failure to do so could result in damage to the equipment.

IMPORTANT:

 All inverters connected to ports on the HUB Communications Manager must be

assigned valid designations for stacking and Power Save Levels. If this is not

done, the system may give any number of error messages or other symptoms.

 All stacked inverters must have the same firmware revision. If inverters are

stacked with different firmware revisions, any inverter with a revision different from

the master will not invert and will not connect to an AC source. The MATE3s will

An inverter firmware mismatch has been detected. Inverters X, Y, Z

are disabled.

Visit www.outbackpower.com for current inverter firmware.

 Combining unstacked or incorrectly stacked inverters may cause similar problems.

 If more than one model series is stacked together, any inverter model belonging to

a series different from the master will not invert and will not connect to an AC

source. The MATE3s will register an event and will display the following message:

A model mismatch has been detected. Inverters are incompatible. Inverters X, Y,

are disabled. Match all models before proceeding.

 Stack modes are inverter-dependent. The list to the right shows all possible

modes. Some are not available with all OutBack inverters.

The output is activated when the selection is complete. Regardless,

make certain to observe the caution below when programming.

 Stack Mode — Assigns the inverter to a specific priority and

output (phase). This assignment must be made for every

inverter that is connected to a HUB port. In a multiple-inverter

system, one inverter must be assigned as master. The others

are assigned to other phases or as slaves.

 Master or 1-2phase Master — The primary inverter for

single-inverter systems, single-phase stacked systems, or

split-phase systems. In models where this selection reads

Master, it is also used for three-phase systems.

 Slave — A secondary inverter in a stacked system.

 Classic Slave — A secondary (L2) inverter, partly

independent of the master.

 OB Slave L1 — A secondary (L1) inverter for single-phase

(parallel) or split-phase multiple-inverter systems.

 OB Slave L2 — A secondary (L2) inverter for split-phase

multiple-inverter systems.

 L2 Phase Master — The subphase master inverter for the

L2 output in a split-phase system.

 B Phase (C Phase) Master — The subphase master

inverters for the B or C outputs in a three-phase system.

 3p Master or 3phase Master — The primary inverter for

three-phase systems that include the selection 1-2ph

Master as shown above. The 3p Master is Phase A.

 3phase Classic B (C ), or 3p OB Slave A (B/C ) —

A secondary inverter for three-phase systems. Used in

models where the phases are manually assigned.

 3phase Slave — A secondary inverter for three-phase

systems. Used in older models for B and C phases where

the phases are assigned based on the HUB port.

See the inverter literature for more information on these

stacking modes.

IMPORTANT:

Inverters with higher-level settings will go

into Silent mode sooner. The master

must stay on and should have the lowest

setting. The default is zero (0). Normally

it should be left at zero (0).

I-11. Grid-Tie

Sell

This menu sets basic limits for Offset operation, which

includes the “grid-tie” (grid-interactive) function.

 Offset Enable (also called Grid-Tie Enable*) — Enables or

disables the inverter’s Offset function by selecting Y or N.

This controls grid interaction in applicable models. It also

controls offset operation in the Support, Mini Grid, and

GridZero modes in applicable models.

NOTE: If Enable Auto Grid-Tie Control (see page 38) is

set to Y (yes), Offset Enable may be turned on according to

MATE3s and FLEXnet DC automatic criteria, even if it is

manually turned off here. Offset Enable will switch to Y.

 Sell Voltage — Sets the operating point for offset operation,

including the grid-interactive function. When this point is

exceeded (usually from renewable charging), the inverter

sends the extra power to the loads. This offsets the use of the

AC source. If the energy exceeds the loads, a grid-interactive

inverter can sell the power to the utility.

 Grid-Tie Window* — Sets the requirements for the utility grid

before the grid-interactive function can work. If the voltage

and frequency are within designated ranges, the inverter

can sell power. Otherwise, this function will not operate.

(A message will appear in the Sell Status screen.) Two

selections are available, IEEE and user. Specific settings for

each set point are listed in the inverter literature.

 The IEEE selection has narrower settings than the user setting.

 IEEE is required by most utilities in the United States. (For

American models, its voltage and frequency criteria are preset to

the requirements of UL1741 and IEEE 1547.)

*Only used in GS8048 and grid-interactive FX-class inverters

Selecting Power Save Ranking will bring up one of the menus below. This

depends on whether the inverter on that port has been set as a master (including

subphase masters) or a slave. The inverters are given a “rank” or level number.

This controls the order in which slaves activate (or return to Silent mode).

 Master Power Save Level — Sets the rank of the master or subphase master.

Any inverter ranked equal or less than the master will not enter Silent mode.

 Slave Power Save Level — Sets the ranking of slave inverters. This rank

controls the order in which slaves activate (or return to Silent mode). Lower

rank numbers activate when lesser loads are applied. Higher ranks only

activate when the load increases to a high level.

See the inverter literature for more

information on Power Save.

Page 14

900-0125-12-01 Rev A

Page 15

Inverter StackingInverter Settings