Magnum Energy ME-MR Series Owner's Manual page 15

• SETUP: 06 LowBattCutOut - The Low Battery CutOut (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 VDC to 11
VDC (12-volt inverter models), 18 VDC to 22 VDC (24-volt inverter models),
or 36 to 44 (48-volt inverter models). If the battery voltage drops below
the LBCO selected setpoint continuously for more than 1 minute, the fault
LED will come on, the inverter will turn off, and the display will show a '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).
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 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 VDC (12-volt models), 22 VDC (24-volt models) or 44
VDC (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 25%* by setting the LBCO from 10 VDC (12-volt models), 20 VDC (24-
volt models) or 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 36 (48-volt models)
before recharging.
* These discharge percentage are rough estimates; for accurate battery
monitoring, a battery monitor such as Magnum's ME-BMK and the ME-RC
is required.
Info: The higher the LBCO setting, the shallower the discharge of
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.
B o tto m lin e sh o w s
cu r r e n t " sa ve d " se ttin g
LBCO
M EN U
10 VDC
H O M E
If th is se ttin g is co r r e ct , p r e ss
m e n u b u tto n to a cce ss
d iffe r e n t m e n u ite m s
p r e ss
LBCO
9 VDC
Figure 3-3, LBCO: Low Battery Cut Out
©2009 Magnum Energy Inc.
If a d iffe r e n t se ttin g is
r e q u ir e d :
O N / O F F
C H A N G E
p r e ss
LBCO
.......
.......
10 VDC
Setup
T o sa ve th e cu r r e n t
se ttin g d isp la ye d :
SA VE
H O L D
p r e ss
LBCO
11 VDC
13