SENS EnerGenius® DC Compact Technical Manual
41
9.12.
Load Share Charger Operation
Multiple chargers may be connected in parallel to provide charger redundancy and increased charging
current. Load sharing chargers are fault tolerant; one charger failure will not cause failures in paralleled
chargers.
9.12.1.
Load Sharing and Synchronization
Connection of a network cable between chargers using the SENSbus RJ-45 connectors (see section
) automatically initiates load sharing and synchronization of all operating modes. Other than
adding the network cable and verifying that it is terminated correctly the user does not need to
make any configurations or adjustments. Chargers will share the current load 10%. For
proper load share operation, a 120-ohm terminator is required at the ends of the SENSbus.
Chargers intended for load sharing must be configured with the same output settings in order to
load share properly. The LOAD SHARE FAIL alarm will occur any time a charger is unable to load
share. If a charger in a multi-charger load sharing system fails or is disconnected the remaining
chargers will still load share and ignore the faulted charger. Each load sharing charger will alarm
independently using individually configured alarm setpoints. The output voltage and current of
each individual charger will be shown on its front panel LCD.
9.13.
Remote Alarm/Communications Panel Accessory
The optional remote alarm/communications panel accessory provides additional alarm relay contacts
and the ability to adjust and communicate with multiple chargers using one external device. Connection
of a network cable between the accessory and charger(s) using the SENSbus RJ-45 connectors (see
section
) automatically initiates communication. For proper operation, a 120-ohm terminator is
required at the ends of the bus. Adjust configuration and view status using the remote panel keypad
and display. See section
for keypad operation.
9.14.
Efficiency
Figure 12 shows the efficiency of the charger at a given input voltage with a 150VDC output voltage.
Figure 12
–
Efficiency
87.0%
88.0%
89.0%
90.0%
91.0%
92.0%
93.0%
94.0%
95.0%
96.0%
97.0%
5
15
25
35
45
55
Ef
fi
ci
enc
y
(%)
Output Current (A)
Efficiency - 150VDC Output
400VAC
480VAC
