TSUN Microinverter Quick Installation Guide

DANGER

• Only qualified personnel should install, troubleshoot, or replace TSUN microinverters or the cable and accessories.
• Before installation, check the unit to ensure absence of any transport or handling damage, which could affect insulation integrity or safety clearances.
• Unauthorized removal of necessary protections, improper use, incorrect installation and operation may lead to serious safety and shock hazards or equipment damage.
• Be aware that installation of this equipment includes risk of electric shock.

Step 1. Make an installation map

CAUTION

• If there are more than one installation site, please make the installation map separately and give a clear description about the installation site.
• The row of the table corresponds to the shorter side of the PV module and the column of the table corresponds to the longer side of the PV module. The direction on the upper left corner means the actual installation orientation.

Take out the SN labels and installation map from the package. Paste the SN labels on the installation map as below and complete the information of the solar plant.

TSOL- MS400/MS350/MS300

TSOL- MS800/MS700/MS600

Step 2. Fix the microinverter.

DANGER

• Do not install the equipment in adverse environment conditions such as flammable, explosive, corrosive, extreme high or low temperature, and humid.

WARNING

• Choose installation location carefully and adhere to specified cooling requirements. Microinverters should be installed in a suitable position with good ventilation and no direct sunlight.

CAUTION

• There are no screws and nuts in the package.
• The distance between every two microinverters should meet the length of AC cables. The length of AC cables are shown as below:

Choose an installation position. Using two pairs of screws and nuts to fix the microinverter on the frame. Make sure that the label of the microinverter should be upside.

Step 3. Connect the AC cable of two microinverters

WARNING

• According to the max current of the AC cables, there is a max installation quantity for the microinverter in each cable section.

Every microinverter could be connected to the other one by its AC cables. Plug the female AC connector of one microinverter into a male AC connector of another microinverter to form a continuous AC branch circuit.

Use Nylon cable ties to fix the AC cables onto the frame.

Use a Connector Protective Cap to make sure the unused AC connector is closed.

Step 4. Connect the AC end cable of each cable section

DANGER

• Do not install the AC junction box without first removing AC power from the system.
• To prevent electrical hazards, make sure the microinverter system is disconnected from the home distribution network and the AC breaker is open.

WARNING

• Ensure that all AC cables are correctly wired and that none of the wires are pinched or damaged.
• Use AWG 12 (4 mm²) cable for AC end cable.

CAUTION

• The installation technician is responsible for selecting a kind of AC cable and connecting the microinverter system into the home distribution network correctly.
• The AC connectors may be provided by different suppliers. The port definitions are subject to actual objects.

Take out the AC connector from the package. Separate the AC connector as shown below.

Get the AC cable through the shell of the AC connector and connect the cable to the right port.

The definition of the port is shown below:

• Live (Brown/Red)
• Neutral (Blue/Black)
• PE (Ground/Yellow-Green)

If the microinverter is connected to 120/240V split-phase power grid, connect two live lines to port L and port N.

If the microinverter is connected to 230/400V three-phase WYE power grid, connect the live line to port L and connect the neutral line to port N, as the connection of single-phase power grid.

If the microinverter is connected to 127/220 V three-phase power grid, connect one live line to port L and connect another live line to port N.

Plug the AC connector into the microinverter and connect the AC cable to the AC distribution box.

Step 5. Connect the DC cable

DANGER

• When the photovoltaic array is exposed to light, it supplies a DC voltage to the inverter.

WARNING

• Ensure that all DC cables are correctly wired and that none of the wires are pinched or damaged.
• The DC conductors of this photovoltaic system are ungrounded and may be energized.
• The maximum open circuit voltage of the PV module must not exceed the specified maximum input DC voltage of the TSUN microinverter.

CAUTION

• If the DC cable is too short for installation, use a DC Extension Cable to connect PV modules to the microinverter.
• Use MC4 compatible DC connectors on the inverter side of the DC extension cable, or get the DC connectors from TSUN.
• Contact PV module manufacturers for the requirements of DC connectors on the module side of the DC extension cable.

Install the PV modules and connect the DC cable to the microinverter.

Step 6. Start the System

DANGER

• Only qualified personnel should connect this system to the utility grid.

CAUTION

• Do not connect microinverters to the grid or energize the AC circuit(s) until you have completed all the installation procedures and have received prior approval from the electrical utility company.

After installation is complete, turn on the main utility-grid AC circuit breaker. Your system will start producing power after about a two-minute wait time.

The LED will flash green and red at startup. The definition of the LED is shown as below: