
© 2019 Hoymiles Power Electronics Inc. All rights reserved.
24
MI-300N/MI-350N/MI-400N
Remove the PV panel from the racking, and cover the panel.
Using a meter to measure and make sure there is no current flowing in the DC wires between
panel and microinverter.
Use the DC disconnect tool to remove the DC connectors.
Use the AC disconnect tool to remove the AC connectors.
Un-screw the fixing screw on the top of the microinverter and remove the microinverter from the
PV racking.
b. How to replace the Microinverter:
Please record down the new Microinverter’s SN.
Please make sure the AC branch circuit breaker if off, and following the Microinverter installation
steps to install the replacement unit.
Go to the monitoring platform (if customer already register this station online), please access the
“Device List” page and find the device that you just replaced. Please click the down arrow next to the
“More” on the right side of the page, and select “Replace”. Input the new Microinverter’s SN and click
“Ok” to complete the station changes.
7. Decommissions
7.1 Decommissions
Disconnect the inverter from DC input and AC output; remove all connection cable from the
Microinverter; remove the Microinverter from the frame.