User Manual

#4 -13511 Crestwood Place, Richmond, BC, V6V 2E9, Canada + 1.778.776.3288 [e-mail]
discoverbattery.com
885-0001 REV C
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6.4 Peak Load Shaving 6.5 AC Coupled Charging
6.6 DC Coupled Charging /
Auxiliary DC Charging
6.7 Grid Charging 6.8 Generator Support
Peak Load Shaving can be used when the
user wishes to limit the power consumed
from the grid. The power to supply the
loads is inverted from the batteries. The
inverter can be set to consume energy
from the batteries when the load demand
exceeds the programed level during set
hours of the day.
Grid Charging occurs when the batteries
are at a low state of charge and the grid
source is available, often after a blackout.
The inverter will charge at a rate that will
not exceed the programmed AC input
current. If the loads draw more current
then available the power used to charge
the batteries will be reduced.
When the grid is lost the inverter will
charge the batteries using the AC source
from the grid-interactive inverter. When the
batteries are fully charged the inverter can
change the output frequency to instruct
the grid-interactive inverter to reduce or
cut out its output power.
Generator Support will happen when the
loads are drawing more power than the
generator can support. In this scenario the
inverter will stop charging and begin to
invert from the batteries when the load rise
above a programmed threshold.
DC Coupled solar charge controllers
or other DC sources such as micro
hydroelectric can directly charge
the batteries without interfacing with
the inverter. The AES batteries can
speak directly with Schneider charge
controllers via Xanbus to control the
charge voltage. In applications where
there is no communication the DC charge
voltage should be set to:
Nominal System Voltage 24V 48V
Charge Voltage Setting 27.2V 54.4V
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