Hoymiles MI-300 Quick Installation Manual

1. Accessories *Note: Please install the microinverter at least 50 cm above the ground/roof for better communication with the Hoymiles DTU. Step 2. Connect AC Cables of Microinverter Item Description AC End Cable (Female), 2 m 12 AWG Cable M8 × 25 Screws DC Extension Cable, 1 m AC Female End Cap, IP67 A) Plug the AC connector of the first microinverter into the connector of the second microinverter to form a continuous AC branch circuit. B) Install the AC end cap on the open AC connector of the last microinverter in the AC branch circuit. *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.) Step 1. Attach Microinverter on Rail A) Mark the approximate center of each panel on the frame. MI-300/350/400 Quick Installation Guide B) Fix the screw on the rail. 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. *Note: The length of AC cable on microinverter is around 1.23 m. If the distance between two microinverters is more than 1.21 m, please use the AC extension cable between two inverters (as shown in the picture below).

Step 6. Energize the System A) Turn on the AC breaker of the branch circuit. B) Turn on the main AC breaker of the house. Your system will start to generate power after about two minutes of waiting time. A) Mount the PV modules above the microinverter. B) Connect the PV modules’ DC cables to the DC input side of the microinverter. Step 4. Create an Installation Map A) Peel the removable serial number label from each microinverter. (The position of the label is shown as below.) B) Affix the serial number label to the respective location on the installation map. *Note: L: Brown wire N: Blue wire G: Yellow/Green wire Please use a 12 AWG cable as the AC end cable. Product information is subject to change without notice. (Please download reference manuals at www.hoymiles.com.) Step 3. Connect AC End Cable Region: Global AP040088 REV2.1 © 2020 Hoymiles Power Electronics Inc. All rights reserved. Step 7. Set Up the Monitoring System Refer to the DTU User Manual, DTU Quick Installation Guide, and Quick Installation Guide for S-Miles Cloud (Hoymiles Monitoring Platform) Online Registration to install the DTU and set up your monitoring system. A) Create the AC end cable. 1. Separate the AC port into 3 parts. 2. Insert the AC cable from Part 3 to Part 2, and complete the wiring for the L, N and Ground inside the Part 1 AC port accordingly. Coated with solder Part 1 Part 2 Part 3 AC Cable Part 1 Part 2 3. Plug the AC port Part 2 into Part 1 once the wiring is complete, then screw on Part 3 to complete the AC extension cable. Part 3 B) Connect the AC end cable to the AC male connector from the first microinverter to complete the circuit. C) Connect the other side of the AC end cable to the distribution box, and wire it to the local grid network.