Magnum Energy ME-RC Owner's Manual page 13

• SETUP: 02 LowBattCutOut - The Low Battery Cut-Out (LBCO) setting
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 9.0 VDC to
12.2 VDC (12-volt inverter models), 18.0 VDC to 24.4 VDC (24-volt inverter
models), or 36.0 to 48.8 (48-volt inverter models). If the battery voltage
drops below the LBCO selected set-point continuously for more than 1
minute, the fault LED will come on, the inverter will turn off, and the display
will show a '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 Battery' 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).
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.
SETU P
Status...
02 LowBattCutOut
press
Status ...
LBCO = 9.0VDC
Figure 3-7, SETUP: 02 LowBattCutOut Selections (12-volt shown)
Where do I set the LBCO setting? If you want to cycle the batteries
slightly - but don't want to discharge them more than 20%*, then the LBCO
setting should be set from 11.5 to 12.2 VDC (12-volt models), 23.0 to 24.4
VDC (24-volt models) or 46.0 to 48.8 (48-volt models). In some applications,
such as installed in an off-grid home or doing a lot of dry-camping in your
RV, you may want to cycle down to 50%* by setting the LBCO from 10.0 to
11.4 VDC (12-volt models), 20.0 to 22.8 VDC (24-volt models) or 40.0 to
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 or 9.5 VDC
(12-volt models), 18.0 or 19.0 VDC (24-volt models), or 36.0 or 38.0 VDC
(48-volt models) before recharging.
* These discharge percentage are rough estimates; for accurate battery
monitoring, a battery monitor such as Magnum's ME-BMK is required.
Info: The higher the LBCO setting, the less the inverter will discharge
the batteries; which should allow the batteries to have a longer life.
The downside to a higher LBCO setting is that you need to charge
more often to prevent the inverter from shutting down.
Info: If there is an Auto Generator Start device installed, it should be
set to start ≥1.0 volts higher than the LBCO setting – this is to prevent
the inverter from shutting down before the generator comes on.
©2009 Magnum Energy Inc.
rotate to
press to select
Status... Status ...
LBCO = 9. 5VDC LBCO = 10.0VDC
rotate to
desired
selection :
Status...
.......
LBCO = 12.0VDC
3.0 Setup
press to save
Status...
LBCO = 12.2VDC
9