12
©2009 Magnum Energy Inc.
Setup
SETUP: 05 Charge Rate -
Used to set the maximum charge rate
allowed to charge the batteries during bulk, absorption,
fl
oat and equalize
charging. Selections are ‘Max Charge = 10%’ up to ‘Max Charge = 100%.
The
Max Charge = 10%
setting is available to help minimize charging while
continuing to allow pass-thru power.
The
Max Charge
selections are provided as a percentage of the inverter/
charger’s maximum charging capability. Refer to label on the side of the
inverter or the operator’s manual for the inverter/charger to determine its
maximum charge rate. Once you
fi
nd this maximum charge rate, determine
the percentage needed to limit the charge rate to your battery bank.
For example, if the maximum charge rate of your inverter/charger is 100 amps
and you need to limit the charge rate to 50 amps, choose the
Max Charge =
50%
selection (50 amps = 50% of 100 amps).
Default setting:
Max Charge = 100%
Info:
The topology of the Magnum inverter, when connected to an
AC source, will override the setting and start charging if the battery
voltage is <7 VDC (12 VDC models), <14 VDC (24-volt models) or
<28 VDC (48-volt models).
How do I determine where to set my maximum charge rate?
The
maximum charge rate is generally set to a C/5* rate (C = the total amp-
hour capacity of the battery bank - using the 20-hour AH rate). The C/5 rate
is usually used when the objective is to charge the batteries as quickly as
possible (i.e. 400 AH ÷ 5 = 80 amp maximum charge rate). A lower rate such
as C/20* is used when the batteries need to be charged as slow as possible.
The ME-MR provides 3 settings for charge rate adjustment and they are 10, 50
and 100%; multiply this percentage and the max charge rate of the inverter
to
fi
nd the closest setting to the desired charger output.
CAUTION:
The C/5 or C/20 charge rate settings are guidelines; they
are not requirements on how you should set your battery charge
rate. For speci
fi
c charge rate requirements, refer to your battery
manufacturer.
Info:
If multiple inverter/charger’s are used on a single battery bank,
you must ensure that the total charge rate from all inverter/chargers
is limited to the maximum charge rate needed for your battery bank.
This Charge Rate setting only limits the charging on each inverter/
charger individually, not on all inverter/chargers.
* C/5 or C/20 rate - Charge rates are commonly expressed as a ratio of the total
amp-hour (AH) capacity of the battery bank. For example, with a 400 AH battery
bank (C = 400), the C/5 charge rate is 80 A (400/5 = 80 A).
•
Bottom line show s
current “saved” setting
If this setting is correct , press
men u button to access
different m enu item s
If a different setting is
required:
CHG RATE
100 %
.......
press
press
press
T o save the current
setting displayed :
CHG RATE
10 %
CHG RATE
50 %
.......
CHG RATE
100%
O N / O F F
C H A N G E
M EN U
H O M E
SA VE
H O L D
Figure 3-5, SETUP: 05 Charge Rate Selections
