Sungrow PVS-16MH User Manual
Pv intelligent combiner box
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Troubleshooting
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Summary of Contents for Sungrow PVS-16MH
- Page 1 User Manual PV Intelligent Combiner Box PVS-16MH/PVS-18MH/PVS-20MH/PVS-24MH PVS-16MH/PVS-18MH/PVS-20MH/PVS- PV Intelligent Combiner BoxUser 24MH ManualPVS-16_18_20_24MH-CN- UEN-Ver81-202412M0D00224 PVS-16_18_20_24MH-CN-UEN-Ver81-202412...
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Page 3: Table Of Contents
Contents 1 About This Manual ...................1 1.1 Validity......................1 1.2 Target Group ....................1 1.3 How to Use This Manual .................1 1.4 Symbol Explanations ..................2 1.5 Model Description...................3 1.6 Related Documents ..................3 2 Safety Instructions ....................4 3 Product Description ..................7 3.1 Product Introduction..................7 3.1.1 Overview ....................7 3.1.2 Main Features..................7 3.1.3 Application Scenarios ................8... - Page 4 5.4.1.2 Dual-post Mounting Structure .............20 5.4.1.3 Subsequent Processing (Optional)..........20 5.4.2 Horizontal Installation ................21 5.4.2.1 Installation Requirements ............21 5.4.2.2 Procedure .................21 5.4.2.3 Cable Securing and Protection ...........22 6 Electrical Connection ..................23 6.1 Safety Instructions ..................23 6.2 Wiring diagram .....................23 6.3 Preparation before Electrical Connections ............24 6.3.1 Opening Cabinet Door.................24 6.3.2 Power-off Preparation................24 6.3.3 Cable Requirements................25...
- Page 5 8.8.1 Installation Guide ................50 8.8.2 Parameter Settings ................51 8.8.3 Firmware Update ................54 8.8.4 Modify Password.................55 8.8.5 About ....................56 9 Routine Maintenance ..................58 9.1 Brief Introduction ..................58 9.2 Maintenance Work..................58 9.3 Fuse Replacement ..................59 9.4 Sealing Strip Replacement ................60 10 Troubleshooting ....................61 10.1 Before Troubleshooting ................61 10.2 Troubleshooting..................62...
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Page 7: About This Manual
About This Manual Validity This manual is valid for the following PV intelligent combiner boxes: • PVS-16MH • PVS-18MH • PVS-20MH • PVS-24MH Unless otherwise specified, any of the above products is hereinafter referred to as "PVS". The above models are the same as PVS-24MH in electrical structure, installation method, and usage. -
Page 8: Symbol Explanations
In order to continuously improve customer satisfaction, products, and product manuals of SUNGROW are always in the process of improvement and upgrade. If your manual is not in accord with the product, it may due to the product version upgrade, and the actual product shall prevail. -
Page 9: Model Description
User Manual 1 About This Manual Marks Explanation High voltage inside! Risk of electric shock by touching it! Protective ground terminal which needs to be firmly grounded to ensure the safety of operators. Model Description Description of the PVS model is as follows: Each letter means: •... -
Page 10: Safety Instructions
Safety Instructions Please read this chapter carefully when installing and using the PVS. SUNGROW reserves the right not to assume responsibility and quality assurance for any personal injury or device damage due to failure to observe these safety precautions. There is a high voltage in the PV string. Accidental contact may cause fatal electric shock or severe burns. - Page 11 User Manual 2 Safety Instructions The grounding cable must be well connected to ground, otherwise: • It may cause fatal electric shock to the operator in case of failure! • The equipment may be damaged when struck by lightning! Incorrect cable connection can cause damage to PV modules, the PVS, and inverters.
- Page 12 2 Safety Instructions User Manual Be sure to lock the door after operation. Do not open the door cover of the PVS frequently to avoid affecting its waterproof performance. Touching the PCB or other static sensitive components may cause damage to components.
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Page 13: Product Description
DC combiner device between PV modules and inverters to minimize cable connections, facilitate maintenance, and improve reliability. The PVS independently developed and produced by SUNGROW is an outdoor combiner box. It is designed for meeting these requirements and provides a Turnkey solution for PV systems together with SUNGROW's PV inverters. -
Page 14: Application Scenarios
User Manual 3.1.3 Application Scenarios The PVS in line with outdoor standards developed and produced by SUNGROW is mainly used in large and medium-sized PV plants. It adopts a modular design to achieve fast installation and to ensure a long-term, reliable, and safe grid-connected operation of the PV plant. -
Page 15: External Dimensions
User Manual 3 Product Description Name Door lock Mounting hanger Waterproof terminal Special connector for PV cable 3.2.2 External Dimensions The external dimensions of the combiner box are shown in the following figure. Internal Structure Taking PVS-24MH-CN as an example, the internal structure of the PVS is shown in the fig- ures below. - Page 16 3 Product Description User Manual Description Positive DC fuse holder and fuse Extended handle for operating load switches/circuit breakers Monitoring panel RS485 communication terminal Grounding point, for equipotential connection DC output wiring terminal Load switch/ Circuit breaker Negative DC fuse holder and fuse Monitoring Panel The monitoring panel monitors the current of each string and uploads the current data to the host computer through RS485 or DC PLC communication.
- Page 17 User Manual 3 Product Description figure 3-3 Close the load switch/circuit breaker...
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Page 18: Delivery And Storage
Delivery and Storage Scope of Delivery Description Quantity Name Including certificate, war- Related ranty card, factory inspec- documents tion report, user manual, etc. To open the cabinet door of the PVS Bolt assembly 16 pairs Special con- 18 pairs To connect the PV input nector for PV 20 pairs cable... -
Page 19: Checking For Transport Damages
Check the internal and external components to see if any damage has occurred during transportation. Contact the forwarding company or SUNGROW in case of any damage or incompleteness. Only intact and undamaged PVS can be installed and started for commissioning. - Page 20 4 Delivery and Storage User Manual • The storage environment should be at the temperature of -40 ℃ ~ +70 ℃ and the relative humidity of 0 ~ 95%, and free of condensation. • Pay attention to possible hazards in the surrounding environment, such as sudden temperature changes or collisions, to prevent any damage to the PVS.
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Page 21: Transport And Installation
Transport and Installation Transport The combiner box will be transported to the power station site, and the on-site management personnel of the power station will negotiate and arrange for delivery and unloading. Transfer of combiner box after delivery. Move to the final position and select the corresponding transportation method according to the factory packaging. -
Page 22: Transporting With A Crane
5 Transport and Installation User Manual Strictly adhere to the relevant safe operating procedures throughout the entire transportation process. 5.1.3 Transporting with a Crane Cranes can be used to lift and move the PVS. Before lifting, attach two flexible synthetic slings to the designated lifting points at the bottom of the outer packaging box. -
Page 23: Preparation Before Installation
User Manual 5 Transport and Installation Moisture during the installation process will cause damage to the PVS. Do not install the PVS in rainy days or when the air humidity is high. After installation, the waterproof terminal must be tightened to prevent water vapor from entering. -
Page 24: Installing Pvs
5 Transport and Installation User Manual General Tools M10 electric φ11 impact drill Wire stripper screwdriver M10 screwdriver Wrench for special connector for PV Hydraulic clamp Crimping tool Wire cutter cable Installing PVS Overview The PVS is fixed to the installation plane by hangers. Therefore, ensure that hangers are installed to the back of the PVS before fixing the PVS to the installation plane. -
Page 25: Vertical Installation
User Manual 5 Transport and Installation 5.4.1 Vertical Installation Install the PVS on the bracket or the back of the PV module at a suitable height to facilitate future maintenance. Add washers to compensate for any misalignment between the surfaces of the two beams on the PV module bracket. -
Page 26: Dual-Post Mounting Structure
5 Transport and Installation User Manual 5.4.1.2 Dual-post Mounting Structure Step 1 Mark positions on the back of the PV module according to the distance between the hang- ers, and drill holes according to the marks. Step 2 Anchor the PVS to the bracket in the sequence shown in the figure below, where the recom- mended torque is: 51±0.7 N.m. -
Page 27: Horizontal Installation
User Manual 5 Transport and Installation 5.4.2 Horizontal Installation The combiner box supports installation in a floating power station environment on the water surface. When applied in this scenario, it is recommended to use a horizontal installation method. 5.4.2.1 Installation Requirements Take into account the below requirements when designing a mounting structure for the PVS: •... -
Page 28: Cable Securing And Protection
5 Transport and Installation User Manual 5.4.2.3 Cable Securing and Protection • The installation angle should meet the specified requirements. • The waterproof connectors should be ≥550mm off the ground. • Secure the cables with cable ties at a distance of 300– 400mm from the waterproof connectors. -
Page 29: Electrical Connection
Electrical Connection Safety Instructions Electrical Hazard! All operations must only be performed by qualified personnel. Do not connect the positive and negative cables in reverse. Otherwise, the device may be damaged. Do not work on the device while it is connected to a load. Fuse installation and removal must only be carried out when no load is connected. -
Page 30: Preparation Before Electrical Connections
6 Electrical Connection User Manual Preparation before Electrical Connections 6.3.1 Opening Cabinet Door To prevent moisture from entering the cabinet, do not open the cabinet door in rainy or snowy days. If it is unavoidable, please take protective measures. Use the dedicated key in the delivery to open the combiner box. 6.3.2 Power-off Preparation Step 1 Check whether the load switch / circuit breaker of the PVS is in the "OFF"... -
Page 31: Cable Requirements
User Manual 6 Electrical Connection 6.3.3 Cable Requirements Model PVS-16MH / 18MH / 20MH /24MH Specifications: special connector for PV cable Input cable Stripped length: 10 mm Tightening torque:2.5~3N.m Specifications: 120~400 mm (copper wire) flame-retardant cable Stripped length: 35 mm... - Page 32 6 Electrical Connection User Manual Name Cable trench Supporting arm of positive output cable Supporting arm of negative output cable Supporting arm of communication cable The PVS adopts PLC communication. Ensure the output cables meet the following require- ments during wiring: •...
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Page 33: Waterproof Connector And Cable Specification
User Manual 6 Electrical Connection If the length difference between the two sets of cables exceeds the limit, the communication may be compromised due to signal waveform distortion from signal reflection. 6.3.5 Waterproof Connector and Cable Specification The bottom of the combiner box is equipped with waterproof terminals for input, output, com- munication, grounding, etc. -
Page 34: Input Connections
6 Electrical Connection User Manual Cable outer diameter Description Model （mm） Waterproof terminal for negative output If no waterproof connectors are used, use a plug cap to seal the gap. Input Connections 6.4.1 Safety Precautions There is a high voltage in the PV string. Accidental contact may cause fatal electric shock or severe burns. -
Page 35: Special Connector For Pv Cable
User Manual 6 Electrical Connection 6.4.2 Special Connector for PV Cable Step 1 Strip off the insulation layer of 10mm from the positive and negative DC cables. Step 2 Crimp the metal contacts onto the stripped wires using a crimping tool. Step 3 Connect the cables as shown below. -
Page 36: Output Connections
6 Electrical Connection User Manual Step 4 Gently pull the cable backward to ensure firm connection. Tighten the cable gland and the insulator (torque 2.5 N.m to 3 N.m). Step 5 Connect the PV connectors to corresponding terminals until there is an audible click. Step 6 Connect other PV terminals according to the above steps. - Page 37 User Manual 6 Electrical Connection Note: The figure is for reference only and the actual product shall prevail. Step 1 Lead the “DC +” cable through the "OUTPUT DC (+)" waterproof connector. Enough cable bending space should be ensured. Step 2 Strip the protective layer and insulation layer of the cable to expose the copper core of L ≈ 25mm, crimp the cable to the appropriate DT terminal, and tighten them with a heat shrinkable tubing.
- Page 38 6 Electrical Connection User Manual Step 3 Fix the crimped DT terminal to the output terminal. When copper wire is used, fix the DT terminal to the output terminal in an order shown in the figure below, and the tightening torque is 119~140N.m. figure 6-1 Schematic of copper wire connection Copper Spring...
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Page 39: Ground Connection
(Stäubli). • If the cross-sectional area of the DC cable is 10 mm², purchase PV connectors separately or contact SUNGROW to place an order. The recommended PV connectors are: PV-KST4-EVO 2/10II-UR / PV-KBT4-EVO 2/10II-UR (Stäubli). Make sure that fastening screws on terminals are fastened in place. If the copper core has not been fully and tightly contacted with the wiring terminal, long-time work may burn the terminal. - Page 40 6 Electrical Connection User Manual Relevant standards and regulations must be observed. • Grounding cables must be connected firmly with both the device and ground terminals. • The ground resistance shall be measured after the ground connection is finished, and its resistance value shall be no more than 1Ω. Grounding Hole There are grounding holes reserved for M5 and M8 riveting screws in the PVS, as shown in the figure below.
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Page 41: Communication Connection
User Manual 6 Electrical Connection Step 5 Fix it to the ground copper bar in the sequence of screw, spring washer, flat washer, OT terminal, and grounding hole. Refer to"table 6-1 Wiring requirements" for the tightening torque. Step 6 Tighten the nut of the waterproof terminal clockwise. - - End Communication Connection 6.7.1 Communication Solution... -
Page 42: Rs485 Communication Wiring
6 Electrical Connection User Manual • The client node of the first PVS communicates with the host node of the inverter; • The client node of the second PVS communicates with the host node of the inverter. And so on, all PVS client nodes communicate with the host nodes of the inverter. The monitoring panel only works when the PV string voltage reaches the rated working voltage of the switching power supply of the PVS. -
Page 43: Subsequent Processing
User Manual 6 Electrical Connection Step 5 Connect the wires of the output cable to A2, B2, and PE terminals in the same way. Step 6 Insert the adapter terminal into the terminal block of the monitoring board to complete the wiring of the RS485 communication. - Page 44 6 Electrical Connection User Manual During the sealing process, avoid direct contact between DT terminals and fireproof material, which may cause serious accidents. Blocking the waterproof vent valve may cause condensation in the PVS and even damage the equipment inside the PVS. After installation or maintenance is completed, lock the door cover and tighten the waterproof cover of the lock core to prevent water leakage.
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Page 45: Commissioning
Commissioning Follow the steps below to check whether the PVS operates normally after installation: Step 1 Measure the input voltage between positive and negative polarities of each input to make sure they are basically same and there is no reverse connection. Step 2 Fasten the fuse holder, the PVS has been powered on. -
Page 46: Isolarcloud App
iSolarCloud App About iSolarCloud The iSolarCloud App can communicate with the PVS over WLAN. This enables local PVS maintenance and allows users to view the PVS information, check its alarms, and set its pa- rameters on the App. User interfaces presented in this manual come from V15.4.1 iSolarCloud App in- tended for iOS devices, which may be different from those actually shown on your screen. -
Page 47: Login
User Manual 8 iSolarCloud App Login 8.3.1 Requirements Before logging in to the App, please make sure: • The PVS is powered on. • Your mobile phone is within 5 meters of the PVS, with no obstructions in between. • WLAN is enabled on your phone. - Page 48 8 iSolarCloud App User Manual Steps Step 1 Tap Local Access at the bottom of the login screen.
- Page 49 User Manual 8 iSolarCloud App Step 2 Turn on WLAN on your phone. You can connect to the PVS in the following two ways. Scan the QR code on the PVS enclosure for WLAN connection. No password is required by default. If a password is needed, it will be the S/N on the PVS nameplate.
- Page 50 8 iSolarCloud App User Manual Click Manual Connection at the bottom and choose Others. A list of device types will show up on the screen. Choose PVS from the list for connection. figure 8-2 Manual Connection - - End The first time the connection is established, a pop-up window will show up, prompting you to complete the settings for Array Name, Device Address, and Actual Access String Configuration.
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Page 51: Function Overview
User Manual 8 iSolarCloud App Tap Go to set to go to "Installation Guide" and complete the settings based on the on-site conditions. This prompt will not appear for subsequent connections. The "Device Address" ranges from 1 to 231, and the "Actual Access String Config- uration"... -
Page 52: Home
8 iSolarCloud App User Manual figure 8-3 Function Tree of the iSolarCloud App Home Once logged in, you will go to the home screen, as shown below. -
Page 53: Run Information
User Manual 8 iSolarCloud App table 8-1 Introduction to Home Screen Description Definition Real-time Indicates whether there is a fault in the PVS. fault alarm Arrows between the icons indicate that there is energy flowing between the devices. The direction in which the arrow points in- Power flow dicates the direction of the energy flow. -
Page 54: Records
8 iSolarCloud App User Manual Records Tap Records in the navigation bar to go to the “Records” screen, as shown below. -
Page 55: More
User Manual 8 iSolarCloud App figure 8-4 Records Tap Fault Alarm Record to view the fault alarm history. You can tap and specify the start time and end time to view the record within a specific period. The PVS can record the recent 8000 entries at most. More Click More in the navigation bar to go to the More screen, as shown below. -
Page 56: Installation Guide
8 iSolarCloud App User Manual figure 8-5 More 8.8.1 Installation Guide Click Installation Guide. Then, set the Array Name and Device Address, and complete the Actual Access String Configuration, as shown below. -
Page 57: Parameter Settings
User Manual 8 iSolarCloud App figure 8-6 Installation Guide The "Device Address" ranges from 1 to 231, and the "Actual Access String Config- uration" ranges from CH1 to CH24. 8.8.2 Parameter Settings System Parameters Choose “Settings→System Parameters”. You'll then see the screen below. - Page 58 8 iSolarCloud App User Manual figure 8-7 System Parameters Click Restore Defaults to restore the PVS settings to their defaults. Click Date Setting to set the date on the PVS. Click Time Setting to set the time on the PVS. Communication Parameters Choose “Settings→...
- Page 59 User Manual 8 iSolarCloud App figure 8-8 Communication Parameters Click “MPLC Parameters” to set the MPLC parameters for the PVS.
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Page 60: Firmware Update
8.8.3 Firmware Update Download the firmware package to your mobile device. Please contact SUNGROW for the firmware package. Step 1 Log in to the iSolarCloud App. Step 2 Choose More at the bottom of the screen, and then tap Firmware Update. -
Page 61: Modify Password
User Manual 8 iSolarCloud App Step 3 Select the update package. A confirmation dialog will pop up. Tap Update Immediately to start. Step 4 Wait for the update to complete. Once finished, a success message will show up on the screen. -
Page 62: About
8 iSolarCloud App User Manual figure 8-10 Modify Password The password should be 8–20 character long and contain letters or numbers. 8.8.5 About Click About. You’ll then see the screen below. - Page 63 User Manual 8 iSolarCloud App figure 8-11 About You can check the current version of the iSolarCloud App here.
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Page 64: Routine Maintenance
Routine Maintenance Brief Introduction Due to the influence of ambient temperature, humidity, dust and vibration, the internal components of the PVS will age and wear, which may lead to potential failures of the PVS. Therefore, it is necessary to implement daily and regular maintenance on the PVS to ensure its normal operation and service life. -
Page 65: Fuse Replacement
User Manual 9 Routine Maintenance The recommended routine maintenance periods in the table are only for reference. The actual maintenance period shall be determined reasonably in consideration of the specific installation environment of the product. Power plant scale, location, site environment, and other factors also affect the maintenance period of the product. -
Page 66: Sealing Strip Replacement
The internal sealing strip wraps around the door, shown as “A” in the figure below. It is recommended to check the sealing strip regularly. If there is any damage caused due to non-human factors, please contact SUNGROW immediately to replace the door and the sealing strip. -
Page 67: Troubleshooting
10 Troubleshooting 10.1 Before Troubleshooting Please notice the following items before troubleshooting: • Disconnect the load switch before operation. • Do not touch bare metal parts such as copper bar under the protective plate. • Pull out the fuse holder to disconnect the input for maintenance of the combiner busbar. High voltage may still exist in terminals of the load switch when it is disconnected! The fuse holder may still be live when the fuse is removed. -
Page 68: Troubleshooting
If the fault does not arise for the afore- mentioned reason and still cannot be resolved, please contact SUNGROW Customer Service. Check whether the internal wiring of the system is broken or whether the The internal module of the terminals are loose. - Page 69 AFCI fault on the DC side. After completing the DC side inspec- tions in Step 1, reconnect DC power and turn on the DC switch. The device will resume operation. If the AFCI fault repeats, please con- tact SUNGROW Customer Service.
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Page 70: Appendix
Max. operating altitude Accessories PV specific SPD SPD failure monitoring PV module power supply RS485 communication Switch status monitoring Yes (only used with SUNGROW 1+X inverters) Parallel arc fault protection Yes (only used with SUNGROW 1+X inverters) Smart string diagnosis... - Page 71 11 Appendix Type designation PVS-16MH-CN PVS-18MH-CN Special connector for PV JK03M2 cable Local WiFi Optional (only used with SUNGROW 1+X inverters) DC PLC communication PVS-20MH-CN/PVS-24MH-CN Type designation PVS-20MH-CN PVS-24MH-CN Max. PV string voltage 1500 V Max. PV string parallel inputs...
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Page 72: Quality Assurance
• The customer shall give SUNGROW a reasonable period to repair the faulty device. Exclusion of Liability In the following circumstances, SUNGROW has the right to refuse to honor the quality guarantee: • The free warranty period for the whole machine/components has expired. -
Page 73: Contact Information
User Manual 11 Appendix 11.3 Contact Information In case of questions about this product, please contact us. We need the following information to provide you the best assistance: • Model of the device • Serial number of the device • Fault code/name •... - Page 74 Sungrow Power Supply Co., Ltd. www.sungrowpower.com...
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