GOODWE UT Series Grid Tied PV Inverter User Manual

GOODWE UT Series Grid Tied PV Inverter

Product Information

The Grid-Tied PV Inverter UT Series is a product manufactured by GoodWe Technologies Co.,Ltd. It is a grid-tied photovoltaic (PV) inverter designed to convert the DC power generated by solar panels into AC power that can be fed into the electrical grid. This user manual, version V1.0-2023-03-20, provides detailed instructions on the installation, electrical connection, and commissioning of the Grid-Tied PV Inverter.

Product Usage Instructions

About This Manual

1. Applicable Model: This manual is applicable to the UT Series of Grid-Tied PV Inverters.
2. Target Audience: This manual is intended for users who will be installing, connecting, and commissioning the inverter.
3. Symbol Definition: This section provides definitions of symbols used throughout the manual.
4. Updates: This manual may be subject to updates. Users should refer to the latest version available for accurate information.

Safety Precaution

• This section provides important safety instructions that must be followed during the installation and operation of the inverter.
• Users should read and understand these precautions before proceeding.

Product Introduction

• This section provides an overview of the Grid-Tied PV Inverter, including its features and specifications.

Check and Storage

• Check Before Receiving: Instructions on how to perform a thorough check of the inverter upon receiving it.
• Deliverables: A list of items that should be included with the inverter.
• Storage: Guidelines on how to properly store the inverter before installation.

Installation

• Installation Requirements: This section outlines the requirements and considerations for installing the inverter.
• Inverter Installation: Detailed instructions on moving and installing the inverter, including step-by-step procedures.

Electrical Connection

• Connecting RS485 Communication Cable: Instructions on how to connect the RS485 communication cable.
• Connecting PLC Communication Cable: Instructions on how to connect the PLC communication cable.
• Installing the Communication Module (Optional): Guidelines for installing the optional communication module.

Equipment Commissioning

• Check Before Power ON:  Precautions and checks to be performed before turning on the inverter.
• Power On: Instructions on how to safely power on the inverter.

System Commissioning

• This section provides guidance on commissioning the entire system after the inverter has been installed and powered on.

Copyright ©GoodWe Technologies Co.,Ltd. 2023. All rights reserved. No part of this manual can be reproduced or transmitted to the public platform in any form or by any means without the prior written authorization of GoodWe Technologies Co.,Ltd.

Trademarks

and other GOODWE trademarks are trademarks of GoodWe Technologies Co.,Ltd. All other trademarks or registered trademarks mentioned in this manual are owned by the company.

NOTICE:  The information in this user manual is subject to change due to product updates or other reasons. This manual cannot replace the safety instructions or labels on the equipment unless otherwise specified. All descriptions here are for guidance only.

About This Manual

This manual describes the product information, installation, electrical connection, commissioning, troubleshooting, and maintenance. Read through this manual before installing and operating the product. All the installers and users have to be familiar with the product features, functions, and safety precautions. This manual is subject to update without notice. For more product details and latest documents, visit https://en.goodwe.com.

Applicable Model

This manual applies to the listed inverters below (UT for short) :

Model GW320K-UT GW320KH-UT GW350K-UT GW350KH-UT

Nominal Output Power 320kW 350kW

Nominal Output Voltage 800V,3L/PE

Target Audience

This manual applies to trained and knowledgeable technical professionals. The technical personnel has to be familiar with the product, local standards, and electric systems.

Symbol Definition

Different levels of warning messages in this manual are defined as follows:

DANGER: Indicates a high-level hazard that, if not avoided, will result in death or serious injury.
WARNING: Indicates a medium-level hazard that, if not avoided, could result in death or serious injury.
CAUTION: Indicates a low-level hazard that, if not avoided, could result in minor or moderate injury.
NOTICE: Highlights key information and supplements the texts. Or some skills and methods to solve product-related problems to save time.

Updates

The latest document contains all the updates made in earlier issues.
V1.0 03/20/2023 First Issue

Safety Precaution

NOTICE

The inverters are designed and tested strictly to comply with related safety rules. Read and follow all the safety instructions and cautions before any operations. Improper operation might cause personal injury or property damage as the inverters are electrical equipment.
General Safety

NOTICE

• The information in this user manual is subject to change due to product updates or other reasons. This manual cannot replace the safety instructions or labels on the equipment unless otherwise specified. All descriptions here are for guidance only.
• Before installations, read through the user manual to learn about the product and the precautions.
• All operations should be performed by trained and knowledgeable technicians who are familiar with local standards and safety regulations.
• Use insulating tools and wear personal protective equipment when operating the equipment to ensure personal safety. Wear anti-static gloves, clothes, and wrist strips when touching electronic devices to protect the inverter from damage.
• Strictly follow the installation, operation, and configuration instructions in this manual. The manufacturer shall not be liable for equipment damage or personal injury if you do not follow the instructions. For more warranty details, please visit https://en.goodwe.com/ warranty.

PV String Safety

DANGER

• Connect the DC input cables using the included PV connectors or terminals. Severe damage might happen if other types of PV connectors or terminals are used, which is beyond the manufacturer’s liability.
• Do not connect the inverter to PV string that requires positiver or negative grounding.

WARNING

• Ensure the component frames and the bracket system are securely grounded. · Ensure the DC cables are connected tightly, securely and correctly. · Measure the DC cables with a multimeter to avoid reverse polarity connection. Also, the voltage should be under the permissible range. · Do not connect one PV string to more than one inverter at the same time. Otherwise, it may damage the inverter. · Ensure that the positive or negative poles of the PV string do not short-circuit to the ground. Otherwise, severe damage might happen, which is beyond the manufacturer’s liability.

Inverter Safety

WARNING

• The voltage and frequency at the connection point meet the inverter grid connection requirements.
• Additional protective devices like circuit breakers or fuses are recommended on the AC side. Specification of the protective device should be at least 1.6 times the maximum AC output current.
• Make sure that all the grounding cables are tightly connected. When there are multiple inverters, make sure that all the grounding points on the enclosures are equipotental connected.
• You are recommended to use copper cables as AC output cables. A copper to aluminum adapter terminal is required when an aluminum cable is used.

DANGER

• Do not apply mechanical load to the terminals, otherwise the terminals can be damaged. · All labels and warning marks should be visible after the installation. Do not scrawl, damage, or cover any label on the device. · Warning labels on the inverter are as follows.
• DANGER High voltage hazard. Disconnect all incoming power and turn off the product before working on it.
• Read through the user manual before any operations.
• High-temperature hazard. Do not touch the product under operation to avoid being burnt.

CE Mark

• Delayed discharge. Wait 5 minutes after power off until the components are completely discharged.
• Potential risks exist. Wear proper PPE before any operations. Grounding point.
• Do not dispose of the inverter as household waste.Discard the product in compliance with local laws and regulations, or send it back to the manufacturer.

Personnel Requirements

NOTICE

• Personnel who install or maintain the equipment must be strictly trained, learn about safety precautions and correct operations.
• Only qualified professionals or trained personnel are allowed to install, operate, maintain, and replace the equipment or parts.

EU Declaration of Conformity

GoodWe Technologies Co., Ltd. hereby declares that the inverter with wireless communication modules sold in the European market meets the requirements of the following directives: · Radio Equipment Directive 2014/53/EU (RED) · Restrictions of Hazardous Substances Directive 2011/65/EU and (EU) 2015/863 (RoHS) · Waste Electrical and Electronic Equipment 2012/19/EU · Registration, Evaluation, Authorization and Restriction of Chemicals (EC) No 1907/2006 · (REACH) GoodWe Technologies Co., Ltd. hereby declares that the inverter without wireless communication modules sold in the European market meets the requirements of the following directives: · Electromagnetic compatibility Directive 2014/30/EU (EMC) · Electrical Apparatus Low Voltage Directive 2014/35/EU (LVD) · Restrictions of Hazardous Substances Directive 2011/65/EU and (EU) 2015/863 (RoHS) · Waste Electrical and Electronic Equipment 2012/19/EU · Registration, Evaluation, Authorization and Restriction of Chemicals (EC) No 1907/2006 · (REACH) You can download the EU Declaration of Conformity on https://en.goodwe.com.

Features

Power derating For a safe operation, the inverter will automatically reduce the output power when the operating environment is not ideal. The following are the factors that may occur power derating. Please try to avoid them when the inverter is working. · Unfavorable environmental conditions, e.g., direct sunlight, high temperature, etc. · Inverter’s output power percentage has been set. · Over-frequency derating. · Higher input voltage value. · Higher input current value.

Example: output power derating due to altitude change

Output power (kW)

• 355 350 345 340 335 330 325 320 315 310 305 300
• 3000 3200 3400 3600 3800 4000 4200 4400 4600 4800 5000

Altitude (m)

Reactive power control At night (SVG, optional) To improve the power generation performance of the power station at night, the inverter supports night SVG function. Issuing a reactive power compensation command via the power station monitoring platform, which makes the inverter keep working even when there is no active power output.

Weak grid support

Short circuit ratio (SCR) of the grid system determines the strength of the grid. The grid is defined as a weak grid when SCR is less than 10. The weak grid support function keeps the inverter be on-grid and output current steadly even when the SCR is higher than 1.2.

Replace the fan on-grid Disconnect a single inverter from the utility grid and change its fan, which means the power generation of other inverters in the power station will not be influenced.

Potential Induced Degradation (PID, optional) When the inverter is connected to the grid, the potential difference between the negative pole of the PV array and the module frame decreases the energy generated by the PV modules. That is the PID effect. · Anti-PID function The inverter rises the voltage of the negative pole of the PV array to ground through the PID module. When the voltage to ground is close to zero, the PID effect is suppressed. · PID recovery function The inverter rises the voltage of the negative pole of the PV array to ground to approx. 1/2 DC BUS voltage through the PID module to recover the PID effect. Anti-PID function and PID recovery function can work properly only when the inverter is applied to an IT system.

Description

1. DC switch reset button 1
   • Reset the DC switch manually if it is tripped due to the inverter fault. Press the RESET button using the reset tool and turn the switch from OFF to ON. Controls DC switch 1-3.
2. DC switch 1-3 (DC SWITCH 1-3)
   • Controls PV input terminal 1-3 (MPPT 1-3) to connect or disconnect the PV string.
3. PV input terminal 1-3 (MPPT1-3)
   • Controlled by DC switch 1-3. Used to connect the PV strings.
4. PV input terminal 7-9 (MPPT7-9)
   • Controlled by DC switch 7-9. Used to connect the PV strings.
5. DC switch reset button 2
   • Controls DC switch 4-6.
6. DC switch 7-9 (DC SWITCH 7-9)
   • Controls PV input terminal 7-9 (MPPT 7-9) to connect or disconnect the PV string.
7. PV input terminal 10-12 (MPPT10- Controlled by DC switch 10-12. Used to connect the PV strings.

LED Indicator

Indicates working state of the inverter.

LCD (optional) 23 Button (optional) 24 Grounding point 25 AC cable wiring box
Mounting handles
Bottom handles

Optional. To check the parameters of the inverter.
Optional. To control contents displayed on the screen.
Connects grounding cables to the two grounding points for protection.
Protects the AC output cables. Connects or disconnects the AC cables after opening the AC wiring box.
Two mounting handles To attach the handles, move the inverter, and hand the inverter to the moungting bracket.
Two bottom handles. To attach the handles, move the inverter, and hand the inverter to the moungting bracket.

Nameplate

The nameplate is for reference only.

Product: Grid-Tied PV Inverter Model : GW***-UT

UDCmax : *** Vd.c .

• PV Input
  • UMPP: Vd.c. IDC,max: Ad.c.
  • ISC PV:*** Ad.c
  • UAC, r: 3L/PE~ ***V a.c .
• Output
  • fAC, r: Hz PAC,r: k W IAC,max: Aa.c. Sr: kVA
  • Smax: ***kVA
• P.F.: ~1,0.8cap…0.8ind,Toperating: -~+ ALT: 5000m (>4000m derating)
  • Non-isolated, IP66 , Protective Clas s I, OVC DCII/ACIII

Check and Storage

Check Before Receiving

Check the following items before receiving the product. Check the outer packing box for damage, such as holes, cracks, deformation, and other signs of equipment damage. Do not unpack the package and contact the supplier as soon as possible if any damage is found. Check the inverter model. If the inverter model is not what you requested, do not unpack the product and contact the supplier. Check the deliverables for correct model, complete contents, and intact appearance. Contact the supplier as soon as possible if any damage is found.

Deliverables

NOTICE:  The bluetooth module is optional, and delivered individually. · Connect the DC cables with the delivered PV connectors. The manufacturer shall not be liable for the damage if other terminals are used. · N represents the accessories’ quantity delivered varies depending on the specific inverter type. The number of PV connectors and the PV terminals in the inverter is the same.

Storage

If the equipment is not to be installed or used immediately, please ensure that the storage environment meets the following requirements: 1. Do not unpack the outer package or throw the desiccant away. 2. Store the equipment in a clean place. Make sure the temperature and humidity are appropriate and no condensation. 3. The height and direction of the stacking inverters should follow the instructions on the packing box. 4. The inverters must be stacked with caution to prevent them from falling. 5. If the inverter has been long term stored, it should be checked by professionals before being put into use.

Installation

Installation Requirements

Installation Environment Requirements

1. Do not install the equipment in a place near flammable, explosive, or corrosive materials.
2. Install the equipment on a surface that is solid enough to bear the inverter weight.
3. Install the equipment in a well-ventilated place to ensure good dissipation. Also, the installation space should be large enough for operations.
4. The equipment with a high ingress protection rating can be installed indoors or outdoors. The temperature and humidity at the installation site should be within the appropriate range.
5. Recommended install the equipment in a sheltered place to avoid direct sunlight, rain, and snow. Build a sunshade if it is needed.
6. Do not install the equipment in a place that is easy to touch, especially within children’s reach. High temperature exists when the equipment is working. Do not touch the surface to avoid burning.
7. Install the equipment at a height that is convenient for operation and maintenance, electrical connections, and checking indicators and labels.
8. Install the equipment far away from noise-sensitive areas, such as residential areas, schools, hospitals, etc, to avoid the noise from bothering people nearby.
9. Consult the manufacturer before installing the equipment outdoors in salt affected areas. A salt affected area refers to the region within 500 meters offshore, and will be related to the sea wind, precipitation and topography
10. Install the equipment away from electromagnetic interference. If there is any radio or wireless communication equipment below 30MHz near the equipment, you have to: · Add a multi-turn winding ferrite core at the DC input line or AC output line of the inverter, or add a low-pass EMI filter. · Install the inverter at least 30m far away from the wireless equipment.

Mounting Support Requirements

The mounting support shall be nonflammable and fireproof. · Install the equipment on a surface that is solid enough to bear the inverter weight. · Do not install the equipment on the support with poor sound insulation to avoid the noise generated by the working equipment, which may annoy the residents nearby.

NOTICE

Avoid the water pipes and cables buried in the wall when drilling holes. · Wear goggles and a dust mask to prevent the dust from being inhaled or contacting eyes when drilling holes. · Prepare and secure the mounting bracket if you want to install the inverter on the bracket. · If you need to use the handles or hoisting rings, please contact after-sale service for purchase. Step 1 Put the plate on the wall horizontally and mark positions for drilling holes. Step 2 Drill holes to a depth of 65mm using the hammer drill. The diameter of the drill bit should be 13mm. Step 3 Fix the mounting plate on the wall or the bracket. Wall mounting Avoid the water pipes and cables buried in the wall when drilling holes. The M10 expansion bolts should be prepared by customers.

Installing the Inverter

• Step 1:  Install the handles or hoist rings to the sides of the inverter.
• Step 2: Grab the handles to lift or hoist the inverter to place it on the mounting plate.
• Step 3: Tighten the nuts to secure the mounting plate and the inverter.

Lifting the Inverter

CAUTION

Follow the instructions below to avoid personal injury or equipment damage: · Consider the weight of the equipment before moving it. Assign enough personnel to move the equipment to avoid personal injury. · Make sure all four handles are securely mounted and can withstand the weight of the equipment. · Grab the handle only when moving the equipment. Never use the terminals or base as a handle.

NOTICE: [1] A copper to aluminum wiring terminal is required when using an aluminum cable. [2] Cable length of the RS485 communication cable: 1000m. The values in this table are valid only if the external protective earthing conductor and the phase conductors are the same material. Otherwise, the cross-sectional area of the external protective earthing conductor is to be determined in a manner which produces a conductance equivalent to that which results from the application of this table.

WARNING

The grounding points on the enclosure are preffered. · Make sure that all the grounding points on the enclosure are equipotential connected when there are multiple inverters. · To improve the corrosion resistance of the terminal, you are recommended to apply silica gel or paint on the ground terminal after installing the PE cable. · The PE cable should be prepared by the customer. · The M8 OT terminal should be prepared by customers.

Connecting the PV Input Cable

DANGER: 1. Confirm the following information before connecting the PV string to the inverter. Otherwise, the inverter may be damaged permanently or even cause fire and cause personal and property losses. · Make sure that sum of the max short circuit current of the strings per MPPT are within the permissible range, and the max input voltage is within the permissible range. · Make sure that the positive pole of the PV string connects to the PV+ of the inverter. And the negative pole of the PV string connects to the PV- of the inverter. 2. Do not plug or unplug the connectors when the equipment is working.

WARNING:  1. Connect the DC cables using the delivered PV connectors. The manufacturer shall not be liable for the damage if other connectors are used. 2. The PV strings cannot be grounded. Ensure the minimum isolation resistance of the PV string to the ground meets the minimum isolation resistance requirements before connecting the PV string to the inverter. 3. The DC cable should be prepared by the customer.

WARNING

• Pay attention to the silkscreens L1, L2, L3, and PE on the AC terminal. Connect the AC cables to the corresponding terminals. The inverter may be damaged if the cables are connected inappropriately.
• The grounding point inside the wiring box is used for connecting the PE cable of the multi core AC cable.
• Make sure that the whole cable cores are inserted into the AC terminals. No part of the cable core can be exposed.
• Make sure that the cables are connected securely. Otherwise, the terminal may be too hot to damage the inverter when the inverter is working.
• Reserve certain length of PE cable. Make ensure that the PE cable is the last one to bear the stress when the AC output cable is under tension.
• The waterproof rubber seal ring for the AC outlet hole is delivered with the inverter, which is located in the AC wiring box of the inverter. Please select the rubber seal ring types according to the actual using cables’ specification.
• The M8 OT terminal for PE cable and M12 OT terminal for AC cable should be prepared by customer.
• When multiple inverters are connected to the utility grid in parallel, up to 14 inverters can be connected to a single winding of the box transformer.

Communication Connection

Connecting RS485 Communication Cable

NOTICE

• Make sure that the communication device is connected to the right COM port. Route the communication cable far away from any interference source or power cable to prevent the signal from being influenced.
• Connect the RS485 port of the inverter to other inverters, smart communication unit, or smart datalogger. The total length of the connection cable is less than 1000m.
• If more than 2 inverters are connected and also connected to the smart communication unit or datalogger, at most 20 inverters are allowed on the daisy chain.

Connecting PLC Communication Cable

A PLC communication module is integrated into the inverter to communicate with the smart datalogger or smart communicaiton unit via the AC output cable. Refer to the user manual of the smart datalogger or communication unit for more detailed instructions. Max communication distance between the inverter and the box-type transformer: · The max distance is 1000m when multi-core AC cables are used. · The max distance is 800m when single-core AC cables are used. PLC network scenario

Installing the Communication Module (Optional)

• Plug a bluetooth module into the inverter to establish a connection between the inverter and the smartphone or web pages.
• Set inverter parameters, check running information and fault information, and observe system status in time via the smartphone or web pages.

NOTICE: Refer to the delivered communication module user manual to get more introduction to the module. For more detailed information, visit www.en.goodwe.com.

LCD Button Description

• Stop pressing the button for a period on any page, the LCD will get dark and go back to the initial page.
• Short press the button to switch menu or adjust parameter values. · Long press the button to enter the submenu. After adjusting the parameter values, long press to set it.

System Commissioning

SolarGo App is one smart phone application used to communicate with the inverter via bluetooth, WiFi, 4G or GPRS modules. Commonly used functions are as follows:

1. Check the operating data, software version, alarms, etc.
2. Set grid parameters, communication parameters, etc.
3. Equipment maintenance. For more details, refer to SolarGo User Manual. Scan the QR code or visit SolarGo User Manual to get the user manual.

Maintenance

Power OFF the Inverter

DANGER

• Power off the inverter before operations and maintenance. Otherwise, the inverter may be damaged or electric shocks may occur.
• Delayed discharge. Wait until the components are discharged after power off.

Removing the Inverter

WARNING

• Make sure that the inverter is powered off.
• Wear proper PPE before any operations.

1. Step 1: Disconnect all the cables, including DC input cables, AC output cables, communication cables, the communication module, and PE cables.
2. Step 2: Remove the inverter from the mounting plate.
3. Step 3: Remove the mounting plate. Step 4 Store the inverter properly. If the inverter needs to be used later, ensure that the storage conditions meet the requirements.

Disposing of the Inverter

If the inverter cannot work anymore, dispose of it according to the local disposal requirements for electrical equipment waste. The inverter cannot be disposed of together with household waste.

Routine Maintenance

DANGER: Power off the inverter before operations and maintenance. Otherwise, the inverter may be damaged or electric shocks may occur.

Maintaining Item Maintaining Method

• Check the heat sink, air intake, and air outlet for foreign matter or dust.
• Check the fan for proper working status, Fan low noise, and intact appearance.

DC Switch

• Turn the DC switch on and off ten consecutive times to make sure that it is working properly.

Electrical Connection

• Check whether the cables are securely connected. Check whether the cables are broken or whether there is any exposed copper core.

Sealing

• Check whether all the terminals and ports are properly sealed. Reseal the cable hole if it is not sealed or too big.

Technical Parameters

Technical Parameters

Input Max. Input Voltage (V) MPPT Operating Voltage Range (V) MPPT Voltage Range for Nominal Power Start-up Voltage (V) Nominal Input Voltage (V) Max. Input Current per MPPT (A) Max. Short Circuit Current per MPPT (A) No. of MPP Trackers No. of Input Strings per MPPT Output Nominal Output Power (kW) Nominal Output Apparent Power(kVA) Max. AC Active Power (kW) Max. AC Apparent Power (kVA) Nominal Output Voltage (V) Nominal AC Grid Frequency (Hz) Max. Output Current (A) Output Power Factor Output THDi (@Nominal Output) Efficiency Max. Efficiency European Efficiency Protection PV String Current Monitoring Internal Humidity Monitoring Residual Current Monitoring Unit PV Insulation Resistance Detection Anti-islanding Protection

PV Reverse Polarity Protection DC Surge Arrester AC Surge Arrester AC Overcurrent Protection AC Short Circuit Protection AC Overvoltage Protection Reactive Power Control At Night DC Switch Remote Shutdown Emergency Power Off Anti-PID General Data Operating Temperature Range () Relative Humidity

Max Operating Altitude (m)

Communication

Weight (Kg) Dimensions (W×H×D mm) Protection Degree Night Self Consumption (W) Noise (dB) Topology

• Integrated Type II Type II
  • Integrated Integrated Integrated Optional Integrated Optional Optional Optional
• Integrated Type II Type II
  • Integrated Integrated Integrated Optional Integrated Optional Optional Optional
• Integrated Type II Type II
  • Integrated Integrated Integrated Optional Integrated Optional Optional Optional
• Integrated Type II Type II
  • Integrated Integrated Integrated Optional Integrated Optional Optional Optional

Official Website

GoodWe Technologies Co.,Ltd. No. 90 Zijin Rd., New District, Suzhou, 215011, China
www.goodwe.com
service@goodwe.com

References

• GoodWe: Smart Energy Innovator
• GoodWe: Smart Energy Innovator

Read User Manual Online (PDF format)

Download This Manual (PDF format)

Download this manual  >>