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
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
Parts and Tools Needed...............................................................................................................................28
