900-0125-12-01 Rev A
©2017 OutBack Power Technologies. All Rights Reserved.
Page 34
Page 35
M-3 High Battery Transfer (HBX)
In High Battery Transfer (HBX) mode, the system is connected to an
AC source such as the utility grid; however, it will use battery power
as the first priority. The AC source is locked out until needed.
In this mode, the system runs on DC power for as long as the batteries can be sustained. It is expected
that the batteries will be charged from renewable sources such as PV power. When the batteries become
depleted, the system reconnects to the AC source to operate the loads.
The batteries may be recharged during this time using the renewable source. When the batteries are
recharged to a high enough voltage, the system transfers back to the batteries as the primary source
(hence the name High Battery Transfer).
HBX Mode commands the inverter to:
o
Connect to an AC source if the battery voltage has fallen below the
Grid Connect
voltage for the amount of time
set in the (connect)
Delay
set point
o
Connect to an AC source if the battery state of charge (SOC) has fallen below the
Grid Connect SOC
for any
amount of time
o
Disconnect the AC source and switch to powering the loads from the battery bank if the battery voltage has risen
above the
Grid Disconnect
voltage for the amount of time set in the (disconnect)
Delay
set point
o
Disconnect the AC source and switch to powering loads from the battery bank if the battery state of charge (SOC)
has risen above the
Grid Disconnect SOC
for any amount of time
IMPORTANT:
HBX
mode will control the master inverter in port 1 of a HUB Communications Manager.
The master will then instruct all subphase masters and slaves to connect or disconnect from the
AC input source.
For best operation, the inverter’s charger should be turned off when
HBX
mode is in use.
This mode is intended for systems that rely primarily on the renewable energy source for charging.
The settings of
HBX
mode allow it to disconnect from the utility grid whenever it can charge
effectively using the renewable source. Use of the inverter's charger may interfere with these
priorities. This may keep both
HBX
mode and the inverter's charger from working effectively.
See the
MATE3s Overview Guide
(the
CHARGER
hot key) for instructions on shutting off
the charger.
System Voltage
12 V
High Voltage
13
Low Voltage
12
24 V
36 V
26
38
24
36
48 V
52
48
Time
1 hour
1 hour
1 hour
1 hour
HBX Mode Default Set Points
NOTES ON SELECTING HBX MODE
:
HBX
mode has similar priorities to the
Mini Grid
mode used by FXR-class and Radian-class inverters.
However, it is not compatible with
Mini Grid
and cannot be used at the same time. To prevent conflicts
when using
HBX
mode, make certain not to select
Mini Grid
. (Selection of AC input modes can be found on
page 11. Information on
Mini Grid
and other modes can be found in the inverter
Operator’s Manual
.)
HBX
is also incompatible with the
Grid Use Time
and
Load Grid Transfer
functions in the MATE3s. These
functions do not have similar priorities to
Mini Grid
or
HBX
, but they do control the inverter’s connection and
disconnection with the grid.
HBX
should not be used with these functions. (See pages 36 and 37.)
When deciding whether to use
Mini Grid
mode or
HBX
, the user should consider the aspects of each.
–
Mini Grid
logic is based in the FXR inverter and can function in the absence of the MATE3s.
HBX
logic is based in
the MATE3s and cannot function unless the MATE3s is installed and operating.
–
Mini Grid
can use utility grid power to fully recharge the batteries every time it reconnects to the grid.
HBX
can only do so under specific circumstances.
–
HBX
set points have a wide range of settings.
Mini Grid
uses settings intended to protect the batteries from
excessive discharge; however, most of its settings are automatic and do not allow customization.
–
HBX
works more efficiently with a larger renewable source, but there is no specification for renewable size.
Mini Grid
cannot work properly unless the source is larger than the size of the loads. If this condition is not met,
Mini Grid
will not disconnect the inverter from the utility grid.
Menu Items
Enabled/Disabled
Grid Connect
—
xx.x
VDC (inverter-dependent)
The low-voltage level that causes the system to reconnect to the utility grid.
(Grid Connect) Delay
—
0
to
240
minutes
The delay period after reaching
Grid Connect
before the system reconnects to the utility grid.
Grid Disconnect
—
xx.x
VDC (inverter-dependent)
The high-voltage level that causes the system to disconnect from the utility grid.
(Grid Disconnect) Delay
—
0
to
240
minutes
The delay period after reaching
Grid Disconnect
before the system disconnects from the utility grid.
Grid Connect
SOC
—
10
%
to
100
%
The low-battery state of charge that causes the system to reconnect to the utility grid immediately.
Grid Disconnect SOC
—
50
%
to
100
%
The high-battery state of charge that causes the system to disconnect from the utility grid immediately.
NOTES ON SETTINGS
:
The system must be in the
Grid Disconnect
state to allow HBX default settings to be changed.
The
Delay
set points are used to prevent the inverter from switching to grid power in the event of a sudden,
sizable demand for power that may momentarily drop the voltage below the
Grid Connect
value.
The
SOC
set points are only usable by a system equipped with a battery monitor.
HBX
MATE3s Settings
