HM-800NT Series Quick Installation Guide

1. Accessories

Visual representation of accessories: Item A (AC Trunk Cable), Item B (DC Extension Cable), Item C (M8 Screws), Item D (AC Trunk Port Disconnect Tool), Item E (AC Trunk Connector Unlock Tool), Item F (AC Trunk Port Cap), and Item G (AC Trunk End Cap).

*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 the installer.)

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 Trunk End Cap:

• Use the AC Trunk Connector Unlock Tool ? to unlock the port upper cover.
• 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 Trunk End Cap.
• Plug the upper cover back to the bus connector.

Diagram illustrating the installation of the AC Trunk End Cap. It shows using the unlock tool to open a port, loosening screws on a cap, removing an extra cable, screwing the cap back on, inserting the AC Trunk End Cap, and finally plugging the upper cover back.

2.2 Installation Steps

Step 1. Attach Microinverter on Rail

A) Mark the center of each panel on the frame.

B) Fix the screw on the rail.

C) Hang the microinverter on the screw (as shown in the picture), and tighten the screw. The silver cover side of the microinverter should be facing the panel.

Illustration of a microinverter being attached to a solar panel mounting rail. It shows a screw fixed to the rail, and the microinverter being hung on the screw and tightened. The silver side of the microinverter is shown facing the panel.

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

Step 2. Complete AC Connection

A) Attach the AC Trunk Cable to the mounting rail, and secure the cable with ties.

Visual showing an AC Trunk Cable being attached to a mounting rail and secured with ties.

B) Push the AC connector of the microinverter into the trunk cable connector until you hear a clicking sound. ▶️

Diagram depicting the AC connector of a microinverter being pushed into a trunk cable connector until it clicks.

C) If there is any vacant bus port, please insert the AC Trunk Port Cap in the vacant plug to ensure waterproofing and dustproofing. ?

Illustration of an AC Trunk Port Cap being inserted into a vacant bus port for waterproofing and dustproofing.

*Note: Under circumstances that require removing the inverter AC cable from bus port, please use the AC Trunk Port Disconnect Tool and insert the tool into the side of the AC port. ?️

Step 3. Install AC End Cable

A) Prepare an AC end cable with proper length and insert one side of the cable into the cap. Insert the L, N and Ground lines into the appropriate slots. Tighten the screws, and then reinsert the cap tightly in the port. Plug the upper cover back to the bus connector.

Detailed view of AC end cable preparation. It shows an AC end cable with L (Line), N (Neutral), and PE (Protective Earth/Ground) wires being inserted into appropriate slots within a connector cap. Screws are tightened, and the cap is reinserted. The diagram also indicates 'Coated with solder' for the connection points.

B) Connect the other side of the AC end cable to the distribution box, and wire it to the local grid network. ?

Illustration showing the AC end cable connected to a distribution box, with wiring to the local grid network.

Step 4. Create an Installation Map

A) Peel the removable serial number label from each microinverter (the position of the label is shown on the right). ?️

B) Affix the serial number label to the respective location on the installation map.

Visual of a removable serial number label being peeled from a microinverter, and an installation map template. The map has rows and columns for recording serial numbers and other installation details.

Step 5. Connect PV Modules

A) Mount the PV modules above the microinverter.

B) Connect the PV modules' DC cables to the DC input side of the microinverter. ⚡

Diagram showing PV modules mounted above microinverters, with their DC cables connecting to the DC input side of the microinverters.

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 in about two minutes.

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 to install the DTU and set up your monitoring system.