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.................................................................14
PV Array Configurations ...................................................................................................................14
Ungrounded PV Arrays ................................................................................................................................ 14
Grounded PV Arrays (positive or negative)................................................................................................... 14
Acceptable Input Configurations..................................................................................................................15
Acceptable Input Configurations Between Parallel Optimizers .....................................................................15
Fuses................................................................................................................................................. 15
DC-coupled Storage.....................................................................................................................................15
Inter-row Shading Wiring Example............................................................................................................... 16
Chapter 3: Installing the String Optimizer ................................................................................17
Getting Started.................................................................................................................................17
Parts and Tools Needed...............................................................................................................................17
Mounting and Grounding the String Optimizer ................................................................................18
Mounting Considerations ............................................................................................................................18
Steps...........................................................................................................................................................19
Making Electrical Connections.......................................................................................................... 20
Understanding Connector Polarity............................................................................................................... 20
Connection/Disconnection Order Matters ................................................................................................... 22
Connecting the Inputs ................................................................................................................................. 22
Connecting the Output................................................................................................................................25
Disconnecting the Output and Inputs............................................................................................... 26
Parts and Tools Needed...............................................................................................................................26
Steps...........................................................................................................................................................27
Appendix ..................................................................................................................................29
Compliance.......................................................................................................................................29
