Charge Rate Menu; Figure 3-6, Charge Rate Selections - Magnum Energy ME-MR Owner's Manual

3.2.5

Charge Rate Menu

• CHG RATE – This selection is used to set the maximum charge rate
allowed to charge the batteries during Bulk, Absorption, Float, and
Equalize charging. The CHG RATE = 10% setting is available to help
minimize charging, while continuing to allow pass-through power.
Default setting: CHG RATE = 100%
Range: 10%, 50%, 100%
The charge rate selections are provided as a percentage of the inverter/
charger's maximum charging capability. Refer to the label on the side of
the inverter or to the inverter/charger owner's manual 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.
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 CHG
RATE = 50% selection (50 amps = 50% of 100 amps).
Info: The topology of the Magnum inverter when connected to an
AC source overrides the setting, and starts charging if the battery
voltage is <12 VDC (12-volt models), <24 VDC (24-volt models)
or <48 VDC (48-volt models).
Where to set: 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 three settings for charge rate adjustment—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 specifi c charge rate requirements, refer to your
battery manufacturer.
Info: If multiple inverter/chargers are used on a single battery
bank, you must ensure that the total charge rate from all inverter/
chargers is limited to the max charge rate needed for your battery
bank. This 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 shows
current "saved" setting
MENU
CHG RATE
100%
HOME
If this setting is correct,
press MENU button to
access different menu items
press
CHG RATE
10%

Figure 3-6, Charge Rate Selections

©2013 Magnum Energy, Inc.
If a different setting
is required:
ON/OFF
CHANGE
press
CHG RATE
CHG RATE
50% 100%
3.0 Setup
To save the current
setting displayed:
SAVE
HOLD
press
11