Magnum Energy ME-ARC Owner's Manual page 29

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The Max Charge 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 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
Default setting: Max Charge Rate = 100%
Info: If the Max Charge Rate is set to 0%, the topology 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 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.
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/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.
The Max Charge Rate only limits the charging on each inverter/char-
ger 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).
• 03D VAC Dropout - Used to select the minimum AC voltage that must
be present on the input before the inverter/charger switches from Inverter
Mode to Charger Mode. For example: If this setting is set to Dropout = 60
VAC, then the AC input voltage must be above 60 Volts before the inverter
will switch from inverter mode to charge mode.
This setting also determines the minimum AC voltage threshold where the
charger disengages and the inverter (when turned on) will provide AC power
from the batteries. This protects AC loads from utility outages. For example:
If this setting is set to Dropout = 60 VAC, when the AC input voltage drops
to 60 volts, the inverter will switch from charge mode to inverter mode.
Default setting: Dropout 80 VAC (Export inverter models 160 VAC)
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amps).
3.0 Setup
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