Table 3-2, Battery Type To Charge Voltages - Magnum Energy ME-ARC Series Owner's Manual

Example: The maximum charge rate of your inverter/charger is 120 amps
and you need to limit the charge rate to 72 amps. Choose the Max Charge =
60% setting (72 amps = 60% of 120
Info: If the Maximum Charge Rate setting is set to 0%, the topol-
ogy of the Magnum inverter (when connected to an AC source) will
override the 0% setting and start charging if the battery voltage
is: <12 VDC (12-volt models), <22 VDC (24-volt models), or <44
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.
* 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).
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.

Table 3-2, Battery Type to Charge Voltages

Battery Inverter
Type Voltage
12 VDC
GEL 24 VDC
48 VDC
12 VDC
Flooded 24 VDC
48 VDC
12 VDC
AGM 1 24 VDC
2
48 VDC
12 VDC
AGM 2 24 VDC
3
48 VDC
12 VDC
24 VDC
Custom
4
48 VDC
Note¹: Voltage same as absorption voltage—to prevent equalization.
Note²: Specifi cations for Concord (Lifeline Series) AGM batteries.
Note³: Specifi cations for East Penn, Deka, Discover and Trojan AGM batteries.
Note : When using the Custom setting, the EQ (Equalization) voltage adjust-
4
ment cannot be set lower than the Absorb Voltage setting. Also, the EQ Voltage
adjustment cannot be set higher than 2 volts (12-volt systems), 4 volts (24-
volt systems), or 8 volts (48-volt systems) above the Absorb Voltage setting.
© 2012 Magnum Energy, Inc.
amps).
Absorption
Voltage Voltage
14.1 VDC 13.6 VDC
28.2 VDC 27.2 VDC
56.4 VDC 54.4 VDC
14.6 VDC 13.4 VDC
29.2 VDC 26.8 VDC
58.4 VDC 53.6 VDC
14.3 VDC 13.1 VDC
28.6 VDC 26.2 VDC
57.2 VDC 52.4 VDC
14.5 VDC 13.5 VDC
29.0 VDC 27.0 VDC
58.0 VDC 54.0 VDC
12.0-16.0 VDC 12.0-16.0 VDC
24.0-32.0 VDC 24.0-32.0 VDC
48.0-64.0 VDC 48.0-64.0 VDC
3.0 Setup
Float Equalization
Voltage
14.1 VDC
28.2 VDC
56.4 VDC
15.5 VDC
31.0 VDC
62.0 VDC
15.5 VDC
31.0 VDC
62.0 VDC
14.5 VDC
29.0 VDC
58.0 VDC
12.0-16.0 VDC
24.0-32.0 VDC
48.0-64.0 VDC
1
1
1
1
1
1
31