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©2013 Magnum Energy, Inc.
3.0 Setup
3.2.6 Low Battery Cut-Out (LBCO) Menu
• LBCO
–
This menu is used to set the DC voltage level that turns off
the inverter to help protect the batteries from over-discharge damage.
Selections are from
9 VDC
to
11 VDC
(12-volt inverter models),
18 VDC
to
22 VDC
(24-volt inverter models), or
36 VDC
to
44 VDC
(48-volt
inverter models). If the battery voltage drops below the LBCO selected
setpoint continuously for more than one minute, the FAULT LED will
come on, the inverter will turn off, and the display shows “
FAULT!
Low
Bat”
(low battery status). If the battery voltage falls below 8.5 volts (12-
volt models), 17.0 volts (24-volt models) or 34.0 (48-volt models), the
FAULT LED and Low Bat status will be immediate.
Default settings: LBCO = 10 VDC
(12-volt models),
20 VDC
(24-volt
models) or
40 VDC
(48-volt models).
Range:
9 VDC, 10 VDC, 11 VDC (12-volt models, x2 for 24v, x4 for 48v)
Info:
The inverter will automatically begin to start inverting when
the DC voltage increases to
≥
12.5 VDC (12-volt models),
≥
25.0
VDC (24-volt models) or
≥
50.0 VDC (48-volt models). If AC power
is available and connected to the inverter’s input the inverter will
automatically clear the Low Battery fault, pass the input AC power
to the output, and begin charging the batteries.
Where to set:
To cycle the batteries slightly but not discharge them more
than 20%*, the LBCO setting should be set to 11 VDC (12-volt models), 22
VDC (24-volt models) or to 44 VDC (48-volt models). In some applications,
such as installations in an off-grid home or when doing a lot of dry-camping
in your RV, you may want to cycle down to 25%* by setting the LBCO to
10 VDC (12-volt models), 20 VDC (24-volt models) or to 40 VDC (48-volt
models). In extreme circumstances, you have the ability to discharge the
batteries to 80%* by setting the LBCO to 9 VDC (12-volt models), 18 VDC
(24-volt models), or to 36 VDC (48-volt models) before recharging.
* These discharge percentages are rough estimates; for accurate battery monitoring,
a battery monitor such as Magnum’s ME-BMK and the ME-RC remote is required.
Info:
The inverter will automatically begin to start inverting when the
DC voltage increases to
≥
12.5 VDC (12-volt models),
≥
25.0 VDC
(24-volt models) or to
≥
50.0 VDC (48-volt models). If AC power
is available and connected to the inverter’s input, the inverter will
automatically clear the Low Battery fault, pass the input AC power
to the output, and begin charging the batteries.
Bottom line shows
current “saved” setting
If this setting is correct,
press
MENU
button to
access different menu items
If a different setting
is required:
press
press
press
To save the current
setting displayed:
ON/OFF
CHANGE
MENU
HOME
SAVE
HOLD
LBCO
10 VDC
LBCO
10 VDC
LBCO
9 VDC
LBCO
11 VDC
Note: Values shown are for a 12-volt inverter
Figure 3-7, LBCO: Low Battery Cut-Out Selections
