Figure 3-4, Automatic 4-Stage Charging Graph - Magnum Energy MagnaSine Hybrid Owner's Manual

DC
Voltage
Time
DC
Current

Figure 3-4, Automatic 4-Stage Charging Graph

3.2.2 Load Support
While in the Standby Mode and the charger is enabled, the MSH-RE Series inverter/charger has the
ability to work in parallel with the incoming AC source to support the AC loads using current from
the batteries. During the Standby mode, the current and voltage from the AC source and the AC
load current are continually monitored. When loads that exceed the available current from either
the utility grid or the generator are connected, the Load Support feature is automatically activated.
The Load Support feature causes the MSH-RE inverter/charger to reduce/stop the battery charging
operation and to begin the inverting operation to allow any available current from the batteries to
be used to ensure the AC loads are powered and the current does not exceed the capacity of the
AC source, or trip its output breakers or fuses. The Load Support feature turns off once the load
demand decreases and spare power from the incoming AC source is available; when this happens,
the battery charger is again activated and begins charging the batteries.
For the Load Support feature to automatically function, the following needs to occur:
1. An AC source (utility grid/AC generator) must be connected.
2. The inverter must be enabled (INV LED is on).
3. The battery voltage must be ≥0.5 volts (for a 12-volt system) or ≥1.0 volts (for a 24-volt
system) than the LBCO setting.
Info: If using a remote and the unit is in load support, the status will display as "Load
Support AAC" or "Load Support VDC".
There are two modes of operation within Load Support.
• Load Support AAC – In this mode, the AC loads connected are requiring more power than
the incoming AC source can provide on its own. The inverter pulls the additional current—that
is needed for the loads—from the inverter batteries to keep the incoming AC current from
exceeding the input amps setting on the remote control.
Info: In Load Support AAC, even though the LED indicators may indicate charging, the
inverter/charger may not be putting current into the battery. If using a remote, the
inverter/charger amps AC meter will indicate the load support process by displaying
negative current fl owing from the batteries to the loads. The input amps AC will also
drop during this process, while the load amps AC remains the same.
© 2013 Magnum Energy, Inc.
Absorb
Bulk
Charging
Charging
Absorb
Constant
Increased
Voltage
Voltage
Max
Charge
Rate
Absorb
Time
Constant Reduced
Current Current
Float
Charging
volts
Float
volts
Reduced
Voltage
Monitored
Current
Operation
Full
Charge
Monitored
Voltage
Goes to Full
Charge after
4 hours in
Float Charge
No Current
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