Hoymiles MI-300T Quick Installation Manual Download Page 1

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Region: Global AP040089 REV2.0 © 2020 Hoymiles Power Electronics Inc. All rights reserved.

1. Accessories

Item

Description

AC Bus Cable, 12/10 AWG Cable

M8 × 25 Screws

DC Extension Cable, 1 m

AC Connector Unlocking Tool

Bus Connector Unlocking Tool

AC Sub Cap

AC Bus End Cap, IP67

-  Use the bus connector unlocking tool to 

unlock the port upper cover.

*Note:  All accessories listed above are not included in the package, and need to be purchased separately. Please contact our sales representative 

for pricing information. (M8 screws need to be prepared by installer-self.)

2. Installation Steps

Ensure the microinverter is installed in the required environment. (Refer to product user manual for more details.)

2.1 Pre-installation

A)

  Plan the cable length to make the bus cable aligned with each PV module.

B)

  Install the AC bus end cap:

*Note: Please install the microinverter at least 50 cm above the ground/roof for better communication with the Hoymiles DTU.

2.2  Installation Steps

Step 1. Attach Microinverter on Rail

A)

  Mark the approximate center of each panel on the frame.

B)

  Fix the screw on the rail.

MI-300T/350T/400T Guide Quick Installation Guide

C) 

Hang the microinverter on the screw (as 

shown in the picture below), and tighten 

the screw. The silver cover side of the 

microinverter should be facing the panel.

-  Loosen the three screws with a screwdriver. 

Untighten the cap as circled below, and 

remove the extra cable.

-  Screw the cap back into the port, and insert 

the AC bus end cap.

-  Plug the upper cover back to the bus 

connector.

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