Table of Contents
Read This First .............................................................................................................................. 3
Important Safety Instructions .................................................................................................................4
Safety Message Types.............................................................................................................................4
General Safety........................................................................................................................................5
Disclaimer of Liability..............................................................................................................................6
Before You Begin.......................................................................................................................... 7
Handling and Storage .............................................................................................................................7
Quick Reference and Best Practices ........................................................................................................7
Using Optional Wireless Communication ................................................................................................7
Chapter 1: Product Overview..............................................................................................11
Dimensional Drawings................................................................................................................ 12
Physical Overview ...................................................................................................................... 13
Bar Code Label............................................................................................................................ 13
Chapter 2: Understanding Electrical Configurations...........................................................15
PV Array Configurations............................................................................................................. 15
Ungrounded PV Arrays ......................................................................................................................... 15
Grounded PV Arrays (positive or negative)............................................................................................ 15
Input Criteria.............................................................................................................................. 16
Acceptable Input Configurations...........................................................................................................16
Unacceptable Input Configurations.......................................................................................................16
Acceptable Input Configurations Between Parallel Optimizers .............................................................. 17
Fuses .......................................................................................................................................... 17
DC-coupled Storage.................................................................................................................... 17
Inter-row Shading Wiring Example............................................................................................. 18
Chapter 3: Installing the String Optimizer...........................................................................19
Getting Started........................................................................................................................... 19
Parts and Tools Needed........................................................................................................................ 19
Mounting and Grounding the String Optimizer .......................................................................... 20
Mounting Considerations .....................................................................................................................20
Steps....................................................................................................................................................21
Understanding Connector Polarity ............................................................................................. 22
Making Electrical Connections.................................................................................................... 23
Connection/Disconnection Order Matters ............................................................................................ 24
Connecting the Inputs .......................................................................................................................... 24
Connecting the Output.........................................................................................................................27
Disconnecting the Output and Inputs......................................................................................... 28
