Low Battery Cut-Out (Lbco) Menu - Magnum Energy ME-MR Owner's Manual

3.3.6

Low Battery Cut-Out (LBCO) Menu

• LBCO – This menu is used to set the battery voltage level that turns
the inverter off 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 = 10.0 VDC (12-volt models), 20.0 VDC (24-volt
models) or 40.0 VDC (48-volt models).
Range: 9.0 VDC, 10.0 VDC, 11.0 VDC, 13.0 VDC (12-volt models);
18.0 VDC, 20.0 VDC, 22.0 VDC, 25.5 VDC (24-volt models);
36.0 VDC, 40.0 VDC, 44.0 VDC, 51.0 VDC (48-volt models).
Info: If the inverter shuts down from a LBCO fault, this fault will
automatically be cleared when the battery voltage increases to
the LBCI (Low Battery Cut In) level. The inverter's LBCI level is
determined by the LBCO setting. If the LBCO is 13.0*, the unit
recovers when Vbat ≥13.4V.; if the LBCO is ≤11.0V*, the unit
recovers when Vbat ≥12.5V*.
* These are 12V values; they are different for 24V and 48V inverters.
Where to set: For Lead Acid battery types (e.g., Flooded, GEL, and AGM);
if you want to cycle the batteries slightly—but don't want to discharge them
more than 20%*—then the LBCO setting should be from 11.5-12.2 VDC
(12-volt models), 23.0-24.4 VDC (24-volt models), or 46.0-48.8 (48-volt
models). In some applications, such as an off-grid home or when doing a lot
of dry-camping in your RV, you may want to cycle down to 50%* by setting
the LBCO from 10.0-11.4 VDC (12-volt models), 20.0-22.8 VDC (24-volt
models), or 40.0-45.6 VDC (48-volt models). In extreme circumstances, you
have the ability to discharge the batteries to 80%* by setting the LBCO to
9.0-9.5 VDC (12-volt models), 18.0-19.0 VDC (24-volt models), or 36.0-
38.0 VDC (48-volt models) before recharging.
* These discharge percent ages are rough est im at es; for accurat e bat t ery m onit oring, a
bat t ery m onit or such as Magnum 's ME- BMK and a ME- RC or ME- ARC rem ot e is required.
Bottom line shows
current "saved" setting
MENU
10.0VDC
HOME
If this setting is correct,
press MENU button to
access different menu items
press
LBCO
9.0VDC
N ot e: Valu es show n ar e for a 1 2- volt in vert er
Figu r e 3 - 7 , LBCO: Low Ba t t e r y Cu t - Ou t Se le ct ion s
© 2020 Sensata Technologies
If a different setting
is required:
LBCO
ON/OFF
CHANGE
LBCO
10.0VDC 11.0VDC
3.0 Setup
To save the current
setting displayed:
SAVE
HOLD
press
press
LBCO LBCO
13.0VDC
14