indiamart VN2T08US Single Phase Micro Inverter User Manual

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VN2T08US Single Phase Micro Inverter

Single Phase Micro-Inverter
User Manual
VN2T08US

About Micro-inverters
VN2T08US series micro-inverter belongs to the one-to-two series of micro- inverters, and each micro-inverter can be connected to two photovoltaic modules. This series of micro-inverters can efficiently convert DC power into AC power that meets the grid requirements, and integrated into Grid.
Each of our inverter VN2T08US series can operate independently and monitor the power generation status of each photovoltaic module in real time. This feature provides a high degree of flexibility and reliability, ensuring that each photovoltaic module generates sufficient power.

About this manual
This manual contains important instructions about the VN2T08US , users should read this manual thoroughly before installing or debugging the micro-inverter. For safety’s sake, the technical personnel responsible for the installation, operation and maintenance of this micro inverter must have corresponding qualifications, have received relevant training and master relevant skills, and should strictly follow the instructions contained in this manual during installation, operation and maintenance.

other information
Product information is subject to change without notice. The user manual will be updated regularly.

Important notes

1.1 Scope of application
This manual mainly introduces the assembly, installation, commissioning, maintenance and troubleshooting methods of the following types of micro- inverters:

• VN2T08US
• *Note:
• “08” means 800W

1.2 Target audience
This manual is intended for professional technical personnel only. For the sake of safety, the technical personnel responsible for the installation, operation and maintenance of this micro-inverter must have corresponding qualifications, have received relevant training and master relevant skills, and should strictly follow the instructions contained in this manual during installation, operation and maintenance.

1.3 Safety symbols
The safety symbols used in this user manual are as follows:

electric shock hazard, serious personal injury, or fire.
| This symbol indicates that instructions must be followed strictly to avoid potential safety hazards such as equipment damage or personal injury.
| This symbol indicates that the operation is prohibited. Personnel involved should suspend the operation and proceed only with the utmost caution and with a full understanding of the operation in question.

1.4 Radio wave interference statement
This micro-inverter has been tested and complies with relevant CE EMC requirements and is free from electromagnetic interference. Please note that if not installed properly, this product may cause electromagnetic interference.
You can test whether radio or TV reception is being interfered by this equipment by switching the microinverter off and on again. If this equipment interferes with radio or television reception, please try to correct the effect by doing the following:

1. Adjust the antenna installation position of other electrical appliances.
2. Increase the distance between the micro-inverter and the antenna.
3. Separate the micro-inverter from the antenna with a shield such as metal/concrete material or a roof.
4. Consult your local dealer or an experienced radio technician for help.

Safety Instructions

2.1 Important Safety Instructions
VN2T08US series micro-inverters are designed and tested in strict accordance with relevant international safety standards. However, you must still read and follow all instructions, precautions and warnings in this installation manual when installing and using this micro-inverter.

• All operations, such as transportation, installation, start-up and maintenance, must be performed by qualified professionals who have received relevant training.

• Before installation, please check the product to make sure there is no damage during transportation. If damaged, the insulation performance or safety distance of the micro-inverter may be affected. Please choose the installation location carefully and  observe the specified cooling requirements.
  Unauthorized removal of necessary protective facilities, improper use, and improper installation and operation may lead to equipment damage, or even serious safety accidents and electric shocks.

• Before connecting the micro-inverter to the grid, please contact the local power department. The inverter can be connected to the grid only after obtaining permission from the power department. All connection operations must be completed by qualified technical personnel. It is the installer’s responsibility to provide an external disconnect switch and over-current protective device (OCPD).

• Each input of the micro-inverter is connected to one photovoltaic module. Do not connect batteries or other power sources. When using the micro-inverter, please ensure that the parameters of the working environment are within the range shown in the technical specification table.

• Do not install this equipment in flammable, explosive, corrosive, extreme heat/cold, or humid environments. Do not use this equipment if safety devices are disabled in such environments.

• Be sure to wear personal protective equipment such as protective gloves and goggles during installation.

• Consult the manufacturer for non-standard installation conditions.

• Do not use the device if it operates abnormally.

• If the equipment needs to be repaired, please be sure to use qualified parts. Relevant parts may only be used for the intended purpose and shall be installed by an authorized contractor or our authorized service representative.

• Any liability arising from the use of components from other manufacturers is disclaimed.

• After the micro-inverter is disconnected from the public grid, some components may still be charged, so please be careful to avoid electric shock. Before touching the micro-inverter, ensure that the surface temperature of the device is safe and that the voltage potential of the entire device is within a safe range.

• Our company is not responsible for any damage caused by improper operation.

• Electrical installation and maintenance should be done by qualified electricians, and wiring should comply with local regulations.

2.2 Symbols

In compliance with European Directive 2002/96/EC on waste electrical and electronic equipment and its implementation as national law, electrical equipment at the end of its useful life must be collected separately and sent to an approved recycling facility. Any used equipment must be returned to an authorized dealer or approved collection and recycling facility.
| Notice
When the micro-inverter is running, please do not step within 0.2 meters around it.
| High voltage danger
Micro-inverters generate high voltages that can be life-threatening.
| High temperature on the surface
Do not touch metal surfaces as this micro-inverter becomes hot during operation.
****| CE mark
This micro-inverter complies with EU low voltage standards.
| Please read the manual first
Before installation, operation and maintenance, please read the installation manual carefully.

Product Introduction

3.1 Photovoltaic Grid-connected system
Common photovoltaic grid-connected systems include photovoltaic modules, micro-inverter, electric meters and grids, as shown in the figure below. The photovoltaic modules generate direct current, the micro-inverter converts the direct current into alternating current that meets the requirements of the grid, and the meter feeds the converted AC power to the grid.

3.2 Micro-inverter
A micro-inverter is a component-level photovoltaic inverter that can effectively solve single-point system failures in photovoltaic power generation systems.
Our VN2T08US micro-inverter integrates dual-channel MPPT function, even if a single photovoltaic module fails or is blocked by shadows, other modules are still working normally. This feature maximizes the power generation performance of photovoltaic systems in a cost-effective manner.
This series of micro-inverters has a component-level monitoring function, which can monitor the current, voltage and power data of each component.
In addition, the DC voltage of this series of micro-inverters is only tens of volts (less than 60V), which can minimize potential safety hazards.

3.3 One-to-two system
According to the number of connected photovoltaic modules, micro-inverters can be divided into one-toone, one-to-two, and one-to-four series, that is, micro- inverters can be connected to one, two or four PV modules respectively, as shown in the figure below.

This manual mainly introduces our company’s one-to-two series of micro- inverters. The output power of this series of micro-inverters is as high as 800 VA, which is outstanding among the one-to-two series of micro-inverters.
Each micro-inverter can connect up to two photovoltaic modules, with dual- channel MPPT and modulelevel data monitoring functions, higher power generation and more convenient maintenance.

3.4 WIFI technology
VN2T08US series micro-inverter adopts WIFI wireless communication solution.
After Micro-inverter is connected to the user’s router by WiFi, it communicates with the server through Internet access, and the background server communicates with the user’s app to realize the interaction of power generation data.

3.5 Product Highlights

• Maximum output power up to 800 W
• Peak Efficiency 95.60%
• Static MPPT efficiency up to 99.80%; Cloudy dynamic MPPT efficiency up to 99.76%
• Power factor (adjustable)
• WIFI communication, more stable
• IP67 enclosure

3.6 Port description

3.7 Dimensions (in)

Installation preparation

4.1 Location and spacing requirements
Please install the micro-inverter and all DC connections under the photovoltaic modules, avoiding direct sunlight, rain, snow, ultraviolet radiation, etc. A clearance of at least 1 in should be left around the microinverter enclosure to ensure ventilation and heat dissipation.

4.2 Multiple photovoltaic modules connected to Microinverters
General guidelines:

1. The photovoltaic module should be connected to the DC input port of the micro-inverter.
2. If the length of the original cable is not enough, please use a DC extension cable. Please consult your local power operator to confirm that this DC cable complies with local regulations.

Common wiring methods are shown in the figure below:

Note: Considering the influence of extreme local temperature, the module voltage must not exceed the maximum input voltage of the micro-inverter, otherwise the micro-inverter may be damaged (refer to the “Technical Specifications” section to determine the maximum input voltage).

4.3 Installation tools
In addition to the recommended tools below, other aids may be used on site.

4.4 AC branch capacity
Our VN2T08US can be used with the built-in 12 AWG or 10 AWG AC bus and AC bus T-junction. The  number of micro-inverters that can be connected to each AC leg (12 AWG or 10 AWG) must not exceed the following limits.

| VN2T08US| | | Maximum over current protection
device (OCPD)
---|---|---|---|---
Maximum number of micro-inverters
per spur (12 AWG)| 5@220 V
5@230 V
5@240 V| | | 20 A
Maximum number of micro-inverters
per spur (10 AWG)| 9@220 V
9@230 V
9@240 V| | | 32 A

Note:

1. The number of micro-inverters that can be connected to each AC branch line depends on the current carrying capacity of the cables and connectors.
2. One-to-one, one-to-two and one-to-four series micro-inverters can be connected to the same AC branch line as long as the total current does not exceed the ampacity specified by local regulations.

4.5 Notes
This equipment shall be installed according to the following system design requirements:

• During installation, the device must be disconnected from the grid (disconnect switch), and the photovoltaic modules must be shielded or isolated.
• Confirm that the environmental conditions meet the protection level, temperature, humidity, altitude and other requirements specified in the “Technical Specifications” section of the micro-inverter.
• Do not expose the device to direct sunlight to prevent power derating of the micro inverter due to internal overheating.
• The micro-inverter should be installed in a well-ventilated place to avoid overheating.
• The micro inverter should be installed away from gas or flammable substances.
• During installation, try to avoid electromagnetic interference, otherwise it may affect the normal operation of electronic equipment.

The installation location should meet the following conditions:

• Special brackets for installation of photovoltaic modules and other equipment (such equipment shall be provided by the installation technician).
• Please install the micro-inverter under the photovoltaic module to ensure that it works in a shaded environment, otherwise it may lead to a decrease in the power generation of the micro-inverter.

Micro-inverter installation

| Product Description
---|---
A| Photovoltaic panels
B| DC extension cable
C| M6 screws (provided by the installer)
D| Input adapter cable

• Note: Part of the accessories are not included in the product package and need to be purchased separately. Please contact our sales staff to obtain the latest price information.

LED status

Fast flashing blue light several times before grid connection. Full green flashing (1 second interval) indicates normal startup.

• Slow flashing blue light: does not meet grid connection conditions
• Fast flashing blue light: test status before grid connection
• Green light flashing: grid connected successfully, normal output
• Red light flashing: short on short off long, warning (recoverable), it may be detected that the status does not meet the grid connection in an instant
• Red light flashing: long on, short off short, fault (possibly hardware problem)

* Note:

1. The micro-inverter is powered by the DC side. If the LED is off, check the DC side wiring. If the wiring and input voltage are working, please contact the local dealer or our technical support team.

Technical Parameters

Micro inverter

Model| VN2T08US
Power| 800W
WIFI or BT| WIFI+BT
Input Date(DC)
Recommended Module Power [W]| 2 Group 300 ~ 550
Start up Voltage per Input [V]| 18
MPPT Voltage Range per Input [V]| 16-60
Max. Input Voltage per Input [V]| 60
Max. Input Current per Input [A]| 13
Max. Input Short-circuit Current per Input[A]| 38
Output Date(AC)
Max. Continuous Output Power [VA]| 800
Nominal Continous Output Power [W]| 800
Nominal Output Current [A] (240VAC)| 3.33
Nominal Output Current [A] (208VAC)| 3.84
Nominal Output Voltage [V]| 208/240, L1/L2/PE
LNominal Frequency [Hz]| 60
Power Factor Power factor| >0.99 default
Output Current Harmonic Distortion| <3%
Max. Units Per Branch The maximum units per branch| 9
Efficiency
Peak Inverter Efficiency Peak Inverter Efficiency| 95.60%
CEC Weighted Efficiency weighted efficiency| 95.50%
EU Efficiency| 95.30%
Nominal Mppt Efficiency Nominal MPT Efficiency| 99.90%
Night Time Power Consumption [mW]| <50
Mechanical Date
Dimensions (W×H×D in)| 9.178.151.65
Weight [lb]| 4.2

App monitoring platform

Download the Easy PV software and install it on your phone

https://inverter-en.easycharging- tech.com/download/index.html

8.1 Registration / Login

• The first time you log into the app, you need to set the language in the top right corner.
• When users enter APP, they need to register/login an account before they can enter APP homepage, the main registration/login methods provided by APP for users are: email registration/login, such as (Figure 8.1.0, Figure 8.1.1).
• The registered account forgets the password to retrieve the password, such as (Figure 8.1.2).

Power station
8.2 Creating a power station

• The entry point for creating a power station is by clicking on the “+” in the upper right corner (Figure 8.2.1).
• Enter the page of creating power station details: click the serial number “①” to input the search location precisely; click the modify button of serial number “②” to modify the longitude and latitude; click the serial number “③ “③” can modify the manual input of the detailed address; click “⑤” to zoom in and out the map display; click “④” to enter the page to improve the power station data (Figure 8.2.2, Figure8. 2.3).

8.3 Completion of power station creation

• By clicking the “View this power station” button, you can go to the power station details page (Figure 8.3.1)
• Power station details page, you can focus on the power station name, data update time and other data (Figure 8.3.2)

8.4 Power station detail page

• Under the real-time category, users can follow the power generation of the power plant and the trend of the power generation of the power plant within 24 hours
• Under the statistics category, users can focus on data such as the number of days of power plant operation, cumulative power generation, and environmental data such as the amount of trees planted.
• In the column of historical data, users can switch the table data display by selecting “month”, “year” or “total” to view the power generation data of the power plant at different times.
• Under the device category, users can view the names of the devices that have been bound
• Click the device name to enter the device details page, where you can see some basic information of the device and also unbind the device.
• Under the equipment category, users can view the abnormal information generated during the operation of the power station (not displayed if there are no abnormalities) (as shown in Figure 8.4.1)
• Click on an exception message to enter the alarm details page, where you can see the alarm description, detailed description of the alarm and video. (As shown in Figure 8.4.2)
• Click the “…” icon in the upper right corner of the page icon, an editing pop-up window will appear, in which you can add micro-reverse, view power station information, delete power stations and other functions(As shown in Figure 8.4.3)

8.5 Adding micro-inverse devices

• Users can bind devices in two ways
• Way 1: After entering the device serial number, click the “Add” button (Figure 8.5.1)
• Way 2: Click on the QR code icon, enter the QR code scanning page, and bind the device by scanning the device QR code (as shown in Figure 8.5.2)

8.6 Equipment distribution network and binding equipment

• If the user is binding the device for the first time, he needs to configure the network for the device first (as shown in Figure 8.6.1)
• After successful network distribution, the page jumps to the device binding page, and the user clicks the “Bind Device” button, the device binding is successful (Figure 8.6.2)

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