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The DC Wiring Interconnect Board shown in Figure 3 reflects a 30C3 PCS with DC3 components
installed. The battery positive is connected to DC2 (T7) and the battery negative to the right most
DC COM (T8).
Typically, an external PV array negative connection is made to the bottom and left-most DC COM
(T9) and positive PV array connection to DC3 (T10). Note that the battery and PV Array
connections share a common negative connection: DC COM. They are NOT isolated from one-
another.
There are numerous DC wiring options available on the 30C3, including support for floating,
grounded unipolar and bipolar battery configurations. Refer to Stabiliti™ Series Installations and
Operations Manual (MAN-00115) to determine what configurations best fits your application.
Contact
support@idealpower.com
DC2 and DC3 External Circuit Protection and Disconnect
The 30C (DC2 only) and 30C3 (DC2 and DC3) must be installed with external fused circuit
protection on their DC power ports. A 1000 Vdc rated, 100 A fused PV Disconnect is commonly
used for such purposes. However, Ideal Power recommends that you confirm specific DC
disconnect and safety requirements with your local Authority Having Jurisdiction ("AHJ").
SECTION 5.0 MODBUS INTERFACE
PCS Configuration, Control, and Monitoring
All Stabiliti™ Series Converters are configured, monitored, and controlled via the Modbus RTU
or Modbus TCP Interfaces. The interface consists of a series of signed or unsigned 16-bit
registers, each with its own unique hexadecimal Modbus address.
Several of these registers are read-only that present static values such as model number and
serial number. Other read-only registers are dynamically updated presenting system status,
alarm conditions, port voltage, current, and power levels. The remaining registers control
system configuration, modes of operation, output power levels, and other parameters of the
Converter. These registers are both readable and writable.
Before applying AC or DC Power to the unit, IPWR highly recommends that parties responsible
for initial evaluation first familiarize themselves with the Modbus interface while supplying only
24 Vdc to the Converter's aux power input.
Quick Start Guide Stabiliti™ Series PCS
MAN-00114, Rev D
for questionsregarding DC2 and/or DC3 wiring options.
Page 13 of 28
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