Download
Share
Print this page
Sungrow SG305HX User Manual
  1. Manuals
  2. Brands
  3. Sungrow Manuals
  4. Inverter
  5. SG305HX
  6. User manual
Sungrow SG305HX User Manual

Sungrow SG305HX User Manual

Pv grid-connected inverter
Hide thumbs Also See for SG305HX:

Advertisement

Quick Links

Download this manual
User Manual
PV Grid-Connected Inverter
SG305HX / SG320HX-20 / SG350HX-20
SG305HX_SG320HX-20_SG350HX-20-UEN-Ver11-202401

Advertisement

loading
Need help?

Need help?

Do you have a question about the SG305HX and is the answer not in the manual?

Questions and answers

Related Manuals for Sungrow SG305HX

Summary of Contents for Sungrow SG305HX

  • Page 1 User Manual PV Grid-Connected Inverter SG305HX / SG320HX-20 / SG350HX-20 SG305HX_SG320HX-20_SG350HX-20-UEN-Ver11-202401...

  • Page 3: All Rights Reserved

    Software Licenses • It is prohibited to use data contained in firmware or software developed by SUNGROW, in part or in full, for commercial purposes by any means. • It is prohibited to perform reverse engineering, cracking, or any other operations that com­...

  • Page 4: About This Manual

    Please read this manual carefully before using the product and keep it properly at a place for easy access. All contents, pictures, marks, and symbols in this manual are owned by SUNGROW. No part of this document may be reprinted by the non-internal staff of SUNGROW without written au­...
  • Page 5 Symbols This manual contains important safety instructions, which are highlighted with the following symbols, to ensure personal and property safety during usage, or to help optimize the product performance in an efficient way. Please carefully understand the meaning of these warning symbols to better use the manual. DANGER Indicates high-risk potential hazards that, if not avoided, may lead to death or serious injury.

  • Page 6: Table Of Contents

    Contents All Rights Reserved......................I About This Manual......................II 1 Safety Instructions ....................1 1.1 Unpacking and Inspection..................2 1.2 Installation Safety....................3 1.3 Electrical Connection Safety.................3 1.4 Operation Safety....................5 1.5 Maintenance Safety....................6 1.6 Disposal Safety.....................7 2 Product Description ....................
  • Page 7 4.3 Installation Tools....................26 4.4 Moving Inverter....................28 4.4.1 Manual Transport..................29 4.4.2 Hoisting Transport..................29 4.5 Installing Mounting-bracket.................31 4.5.1 Bracket-Mounted Installation..............32 4.5.2 Pole-Mounting...................33 4.6 Installing the Inverter..................35 5 Electrical Connection ..................37 5.1 Safety Instructions....................37 5.2 Terminal Description...................39 5.3 Electrical Connection Overview................40 5.4 Crimp OT/DT terminal..................
  • Page 8 5.10.2 AC Wring Rules..................87 5.10.3 PLC Wiring..................... 92 6 Commissioning ..................... 94 6.1 Inspection Before Commissioning..............94 6.2 Commissioning Procedure..................94 7 iSolarCloud App ....................97 7.1 Brief Introduction....................97 7.2 Installing App...................... 97 7.3 Login........................98 7.3.1 Requirements................... 98 7.3.2 Login Procedure..................98 7.4 Function Overview....................
  • Page 9 9 Appendix ........................ 134 9.1 Technical Data....................134 9.2 Quality Assurance.....................138 9.3 Contact Information..................138...

  • Page 10: Safety Instructions

    Level 6 or stronger winds. SUNGROW shall not be held liable for any damage to the device due to force majeure, such as earth­...

  • Page 11: Unpacking And Inspection

    Perform operations considering actual onsite conditions. • SUNGROW shall not be held liable for any damage caused by violation of gen­ eral safety operation requirements, general safety standards, or any safety in­ struction in this manual.

  • Page 12: Installation Safety

    If there are problems with the above inspection items, do not install the device and contact your distributor first. If the problem persists, contact SUNGROW in time. 1.2   Installation Safety DANGER •...
  • Page 13 1 Safety Instructions User Manual DANGER The PV string will generate lethal high voltage when exposed to sunlight. • Operators must wear proper personal protective equipment during electrical con­ nections. • Must ensure that cables are voltage-free with a measuring instrument before touching DC cables.

  • Page 14: Operation Safety

    • Determine the specifications of AC circuit breakers strictly in compliance with the applicable local laws and regulations and safety standards or the recommendation by SUNGROW. Otherwise, the switch may not open in time in the event of some­ thing abnormal, which may then lead to safety incidents.

  • Page 15: Maintenance Safety

    1 Safety Instructions User Manual DANGER When the product is working: • Do not touch the product enclosure. • It is strictly forbidden to plug and unplug any connector on the inverter. • Do not touch any wiring terminal of the inverter. Otherwise, electric shock may occur.

  • Page 16: Disposal Safety

    NOTICE To avoid the risk of electric shock, do not perform any other maintenance operations beyond this manual. If necessary, contact SUNGROW for maintenance. Otherwise, the losses caused is not covered by the warranty. NOTICE •...

  • Page 17: Product Description

    2-1 Inverter Application in PV Power System Item Description Note Monocrystalline silicon, polycrystalline silicon and thin-film with­ PV strings out grounding Inverter SG305HX / SG320HX-20 / SG350HX-20 Raises the output voltage of the inverter to a level that meets Transformer the requirements of the grid...

  • Page 18: Product Introduction

    User Manual 2 Product Description Item Description Note The grid form supported by the inverter is shown in the figure Utility grid below 2.2   Product Introduction Model Description The model description is as follows. Appearance The following figure shows the appearance of the inverter. figure 2-2 Appearance The image shown here is for reference only.
  • Page 19 The following figure shows the dimensions of the inverter. figure 2-3 Product Dimensions(in mm) Model Dimensions Weight SG305HX/SG320HX-20/ 1148 mm * 779 mm * 3 71 mm ≤ 106 kg SG350HX-20 *:Due to the multi-supplier for some key components, the actual weight may have a ±8% de­...

  • Page 20: Symbols On Product

    User Manual 2 Product Description 2.3   Symbols on Product Symbol Explanation Do not dispose of the inverter together with household waste. Read the user manual before maintenance! TUV mark of conformity. CE mark of conformity. EU/EEA Importer UKCA mark of conformity. The height of the label should not exceed 5 mm.

  • Page 21: Dc Switch

    2 Product Description User Manual table 2-1 LED Indicator State Description LED Color State Definition The device is connected to the grid and operating nor­ mally. Fast blink The Bluetooth connection is established, and there is (Period: 0.2s) data communication. No system fault occurs.

  • Page 22: Circuit Diagram

    User Manual 2 Product Description *The images shown are for illustration purposes only and may not be an exact representation of the actual product. table 2-2 DC switch PV terminals controlled by the switch AUXILIARY SWITCH DC SWITCH 1 PV1 ~ PV10 DC SWITCH 2 PV11 ~ PV20 DC SWITCH 3...

  • Page 23: Function Description

    2 Product Description User Manual • The AC relay isolates the AC output of the inverter from the grid, making the inverter safe from the grid in case of inverter failure or grid failure. • The AC SPD provides a discharge circuit for the AC side overvoltage to prevent it from damaging the internal circuits of the inverter.

  • Page 24: Unpacking And Storage

    • Check the scope of delivery for completeness according to the packing list. • Check the inner contents for damage after unpacking. Contact SUNGROW or the transport company in case of any damage or incompleteness, and provide photos to facilitate services.

  • Page 25: Unpacking Steps

    3 Unpacking and Storage User Manual 3.2   Unpacking Steps step 1 Use a utility knife to cut the packing tape. Remove horizontal and vertical paper angle beads. step 2 Open the packaging box. step 3 Remove the paper angle bead around the inverter.

  • Page 26: Inverter Storage

    User Manual 3 Unpacking and Storage step 4 Take out the accessories from the box and keep them in a proper place. step 5 Take out the inverter and place it on a flat surface covered with protective materials such as foam or a sponge mat.
  • Page 27 3 Unpacking and Storage User Manual • Store the inverter in a clean and dry place to prevent dust and water vapor from eroding. • Do not store the inverter in places with corrosive substances or susceptible to rodents and insects.

  • Page 28: Mechanical Mounting

    For specific requirements for the installation environment, see 4.2.1 Installation Envi­ ronment Requirements. In case the environment where the device is installed does not meet the requirements, SUNGROW shall not be held liable for any property dam­ age arising therefrom. CAUTION Improper handling may cause personal injury! •...

  • Page 29: Location Requirements

    4 Mechanical Mounting User Manual 4.2   Location Requirements To a large extent, a proper installation location ensures safe operation, service life, and per­ formance of the inverter. • The inverter should be installed at a height that allows easy viewing of the LED indicator panel, as well as easy electrical connection, operation and maintenance.
  • Page 30 • Install the inverter in a place with shelter, or build a sunshade for it. • Please consult SUNGROW before installing inverters outdoors in areas prone to salt dam­ age, which mainly are coastal areas within 500 meters of the coast. The sedimentation amount of salt spray is correlated to the characteristics of the seawater, sea winds, precip­...

  • Page 31: Carrier Requirements

    4 Mechanical Mounting User Manual - If the inverter is installed in a sandy and windy environment, please add safeguards against sand and dust on the air inlet and outlet of the air duct, so as to avoid impacts on fan operation caused by air duct blockage. Please remove the safeguards before putting the inverter into operation.
  • Page 32 User Manual 4 Mechanical Mounting In case the installation site is a level surface, mount the inverter to the bracket to meet the mounting angle requirements, as shown in the figure below. Take the following items into account when designing the bracket scheme: •...

  • Page 33: Installation Space Requirements

    4 Mechanical Mounting User Manual 4.2.4 Installation Space Requirements Space around the inverter Make sure there is sufficient space around the inverter for good ventilation. The space require­ ments for installing a single inverter are shown in the figure below. NOTICE If the actual space reserved for the inverter is smaller than that required in the figure, before fan maintenance, lift the inverter away from the bracket or wall.
  • Page 34 User Manual 4 Mechanical Mounting Air inlets/outlets of the inverter Make sure there is no obstruction to the inverter's air inlets/outlets, to avoid impacting its heat dissipation. The air inlets/outlets of the inverter are shown in the figure below. Inverters installed against the wall If the inverter is installed against the wall, keep it at least 700mm away from the wall.

  • Page 35: Installation Tools

    User Manual When installing more than two inverters back-to-back, sufficient space should be reserved between the adjacent inverters. If the above installation requirements cannot be met, please contact SUNGROW for support. 4.3   Installation Tools Installation tools include but are not limited to the following recommended ones. If necessary,...
  • Page 36 User Manual 4 Mechanical Mounting table 4-1 Tool specification Goggles Earplugs Dust mask Safety gloves Safety shoes Utility knife Slotted screwdriver Phillips screwdriver (M2, M3, M6) (M4, M6, M8) Hammer drill Pliers Marker Level (φ12) Rubber mallet Socket wrench set Open-end wrench Anti-static wrist strap (M4, M8, M12)

  • Page 37: Moving Inverter

    4 Mechanical Mounting User Manual crimping Connector wrench Multimeter Vacuum cleaner tool(4–6mm (≥ 1500 Vdc) Model: PV- CZM-41100 Manufactur­ er: STAUBLI Scissors Hexagon sock­ Electric drill et wrench (φ12) (T30) 4.4   Moving Inverter Move the inverters by carrying them manually or using a hoisting tool based on site conditions. CAUTION Improper handling may cause personal injury! •...

  • Page 38: Manual Transport

    User Manual 4 Mechanical Mounting 4.4.1 Manual Transport Install the four screw-in handles that are provided to the inverter lugs and the base. Lift and move the inverter to the destination by holding the bottom handles and the four installed han­ dles.
  • Page 39 4 Mechanical Mounting User Manual step 1 Release the sealing screws on the mounting lugs and store them properly. Anchor two M12 thread lifting rings to the lugs of the inverter. NOTICE When handling the inverter, do not remove the cushion to avoid damage to the housing or bottom terminals.

  • Page 40: Installing Mounting-Bracket

    User Manual 4 Mechanical Mounting step 4 Remove the lifting rings and reassemble the sealing screws released in Step 1. CAUTION Keep the inverter balanced throughout the hoisting process and avoid collisions with walls or other objects. Stop hoisting in the event of severe weather, such as heavy rain, thick fog, or strong wind.

  • Page 41: Bracket-Mounted Installation

    4 Mechanical Mounting User Manual Reserve enough space when installing the mounting-bracket to meet the installation space requirements of the inverter. 4.5.1 Bracket-Mounted Installation Tools Item Specification Marker Level Electric drill Drill bit: φ12 Wrench Opening: 16 mm Spare parts Item Quantity Specification...

  • Page 42: Pole-Mounting

    User Manual 4 Mechanical Mounting step 2 Secure the mounting-bracket with bolts. (A) Mounting-bracket (B) Full threaded bolt (C) Metal bracket (D) Flat washer (E) Spring washer (F) Hex nuts - - End 4.5.2 Pole-Mounting Tools Item Specification Marker — Level —...
  • Page 43 4 Mechanical Mounting User Manual step 2 Mark and punch holes in the U-beam according to the dimensions shown below. step 3 Use bolts and clamps to fix the U-beam to the pole.

  • Page 44: Installing The Inverter

    User Manual 4 Mechanical Mounting step 4 Use bolts to secure the mounting-bracket to the U-beam. - - End 4.6   Installing the Inverter Spare parts Item Quantity Specification Source Grub screw Delivery scope step 1 If the installation position is high, hoist the inverter to the position (refer to 4.4.2 Hoisting Transport).
  • Page 45 4 Mechanical Mounting User Manual step 3 Fix the inverter with screws. NOTICE It is necessary to secure the left and right sides of the inverter to the mounting-bracket with screws, otherwise the inverter may become unstable. - - End...

  • Page 46: Electrical Connection

    5   Electrical Connection 5.1   Safety Instructions DANGER The PV string will generate lethal high voltage when exposed to sunlight. • Operators must wear proper personal protective equipment during electrical con­ nections. • Must ensure that cables are voltage-free with a measuring instrument before touching DC cables.
  • Page 47 5 Electrical Connection User Manual WARNING • Do not damage the ground conductor. Do not operate the product in the absence of a properly installed ground conductor. Otherwise, it may cause personal injury or product damage. • Please use measuring devices with an appropriate range. Overvoltage can damage the measuring device and cause personal injury.

  • Page 48: Terminal Description

    User Manual 5 Electrical Connection NOTICE • After being crimped, the OT terminal must wrap the wires completely, and the wires must contact the OT terminal closely. • When using a heat gun, protect the device from being scorched. • Before connecting a power cable (such as the AC cable, the DC cable, etc.), confirm that the label and identifier on the power cable are correct.

  • Page 49: Electrical Connection Overview

    5 Electrical Connection User Manual Item Terminal Mark Note 30/24, PV connector PV terminals + / - The number of PV terminals varies, subject to actual product received AC wiring ter­ — Used for AC output cable connection. minal If the PE cable is an independent single-core ca­ Standby ble, it should be led into the AC junction box for grounding ter­...
  • Page 50 If single-core cables are used, whether one-wire per phase or two-wire per phase, the AC sealing plate is different. For details, please contact SUNGROW. The AC cable sealing plate delivered with the inverter varies. The actual product received shall prevail.
  • Page 51 If otherwise, ensure that the cross section of the PE wire produces a conductance equivalent to that of the wire specified in the table. If the SUNGROW MVS is used, please refer to the cable requirements specified in the MVS user manual first.

  • Page 52: Crimp Ot/Dt Terminal

    User Manual 5 Electrical Connection 5.4   Crimp OT/DT terminal Crimp OT/DT terminal 1. Heat shrink tubing 2. OT/DT terminal 3. Hydraulic pliers 4. Heat gun Aluminum Cable Requirements If an Aluminum cable is selected, use a copper to Aluminum adapter terminal to avoid direct contact between the copper bar and the Aluminum cable.

  • Page 53: External Protective Grounding Connection

    It is suggested that the external protective grounding terminal and the AC side ground­ ing terminal are both connected to ground. Other grounding schemes, which meet the local standards and safety regulations, may also be adopted. However, SUNGROW shall not be held liable for any consequence caused thereby.

  • Page 54: Connection Procedure

    User Manual 5 Electrical Connection When there are multiple inverters in the PV system, connect the external protective ground­ ing terminals of all inverters and the grounding points of the PV module brackets to ensure equipotential connections to ground cables (according to the onsite conditions). 5.5.2 Connection Procedure step 1 Prepare the cable and OT/DT terminal, refer to Crimp OT/DT...

  • Page 55: Ac Circuit Breaker

    When multiple inverters are connected to the grid in parallel, ensure that the maximum number of inverters connected in parallel to a single winding of the box-type substation is 15. Otherwise, please contact SUNGROW for technical scheme. MV Transformer The MV transformer used together with the inverter should meet the following requirements: •...
  • Page 56 • The apparent power of the inverter should never exceed the power of the transformer. The maximum AC current of all inverters connected in parallel must be taken into account. If more than 15 inverters are connected to the grid, contact SUNGROW. • The transformer must be protected against overloading and short circuit.

  • Page 57: Requirements For Ot/Dt Terminal

    5 Electrical Connection User Manual • When Anti-PID is enabled, the AC output common mode voltage of the inverter is 906V, and the following requirements should be met: - The LV side winding of the transformer, AC cables, and secondary devices (includ­ ing protective relay, detection and measurement instruments, and related auxiliary de­...

  • Page 58: One-Wire-Per-Phase Wiring (With Multi-Core Cable)

    User Manual 5 Electrical Connection OT/DT Terminals of Phase Wire (Two Wires per Phase with Multi-core Ca­ ble) • Specification: M12 OT/DT Terminal of PE Wire • Specification: M12 5.6.3 One-wire-per-phase Wiring (with Multi-core Cable) This section introduces the connection steps with four-core cable as an example, and the wiring method for three-core cable is the same.
  • Page 59 5 Electrical Connection User Manual step 3 Loosen the screws on the bottom sealing plate with the hexagon socket wrench provided and remove the bottom sealing plate. The screws on the sealing plate are captive screws, which will remain on the sealing plate when the sealing plate is removed to avoid screw loss.
  • Page 60 User Manual 5 Electrical Connection step 6 Strip the external protective layer of the AC cable. A length of at least 50mm above the bottom sealing plate in the cable should be left intact, without being stripped. step 7 Hang the OT terminals on the corresponding wiring terminals in the junction box.
  • Page 61 5 Electrical Connection User Manual step 8 Pass the AC cable through the bottom sealing plate, and put the AC cable and bottom sealing plate into the junction box. For ease of OT/DT terminal crimping, make sure the cable inside the junction box is long enough.
  • Page 62 User Manual 5 Electrical Connection step 10 Crimp the OT/DT terminals onto the wires. Then, secure the wires to the corresponding terminals, at a torque of 30–40N.m, as specified on the label inside the AC junction box. Securing terminals at a torque smaller or greater than the specified value may lead to poor connection.
  • Page 63 5 Electrical Connection User Manual • Ensure that the inner depth L of the socket used is not less than 28mm. • When securing the wires to the corresponding terminals, make sure the wires do not lean forward, backward, leftward, or rightward. •...
  • Page 64 User Manual 5 Electrical Connection step 12 Remove the limit rod and place it in place. Close the junction box and tighten the two screws on its front cover with the hexagon socket wrench provided. - - End When a separate single-core cable is used as the PE cable, lead it into the junction box through the standby grounding terminal.

  • Page 65: One-Wire-Per-Phase Wiring, Duplex Junction Box (With Multi-Core Cable)

    5.6.4 One-wire-per-phase Wiring, Duplex Junction Box (with Multi-core Cable) Only some of the inverters support the two-wire-per-phase connection. Please con­ tact SUNGROW if you have any questions. step 1 Open the AC-side circuit breaker and prevent it from closing inadvertently.
  • Page 66 User Manual 5 Electrical Connection step 3 Loosen the screws on the bottom sealing plate with the hexagon socket wrench provided and remove the bottom sealing plate. The screws on the sealing plate are captive screws, which will remain on the sealing plate when the sealing plate is removed to avoid screw loss.
  • Page 67 5 Electrical Connection User Manual step 6 Strip the external protective layer of the AC cable. A length of at least 50mm above the bottom sealing plate in the cable should be left intact, without being stripped. step 7 Hang the OT terminals on the corresponding wiring terminals in the junction box.
  • Page 68 User Manual 5 Electrical Connection Ensure that the inner depth L of the socket used is not less than 28 mm. step 8 Pass the AC cable through the bottom sealing plate, and put the AC cable and bottom sealing plate into the junction box.
  • Page 69 5 Electrical Connection User Manual step 9 Smooth the cut edge of the cable. Next, wrap it with insulating tape, and then fit the three-branch breakout boot and cold-/heat-shrink tubing. After that, fasten the screws on the bottom sealing plate. The three-branch breakout boot and cold-/heat-shrink tubing should be prepared by users separately and their specifications should match the requirements of the cable used.
  • Page 70 User Manual 5 Electrical Connection...
  • Page 71 5 Electrical Connection User Manual • Ensure that the inner depth L of the socket used is not less than 28mm. • When securing the wires to the corresponding terminals, make sure the wires do not lean forward, backward, leftward, or rightward. •...
  • Page 72 User Manual 5 Electrical Connection step 12 Remove the limit rod and place it in place. Close the junction box and tighten the two screws on its front cover with the hexagon socket wrench provided. - - End When a separate single-core cable is used as the PE cable, lead it into the junction box through the standby grounding terminal.

  • Page 73: Two-Wires-Per-Phase Wiring, Duplex Junction Box (With Multi-Core Cable)

    5.6.5 Two-wires-per-phase Wiring, Duplex Junction Box (with Multi-core Cable) Only some of the inverters support the two-wire-per-phase connection. Please con­ tact SUNGROW if you have any questions. step 1 Open the AC-side circuit breaker and prevent it from closing inadvertently.
  • Page 74 User Manual 5 Electrical Connection • If the two-wire-each-phase connection is adopted for a duplex-junction-box inverter, please make sure the wires of the two cables are connected respectively to the corresponding phase using terminals in the same column. • If the two-wire-each-phase connection is adopted for a duplex-junction-box inverter: Connect wires to terminals in the bottom row first, and then to those in the upper row.
  • Page 75 5 Electrical Connection User Manual step 6 Strip the external protective layer of the AC cable. A length of at least 50mm above the bottom sealing plate in the cable should be left intact, without being stripped. step 7 Hang the OT terminals on the corresponding wiring terminals in the junction box.
  • Page 76 User Manual 5 Electrical Connection Ensure that the inner depth L of the socket used is not less than 28 mm. step 8 Pass the AC cable through the bottom sealing plate, and put the AC cable and bottom sealing plate into the junction box.
  • Page 77 5 Electrical Connection User Manual step 9 Smooth the cut edge of the cable. Next, wrap it with insulating tape, and then fit the three-branch breakout boot and cold-/heat-shrink tubing. After that, fasten the screws on the bottom sealing plate. The three-branch breakout boot and cold-/heat-shrink tubing should be prepared by users separately and their specifications should match the requirements of the cable used.
  • Page 78 User Manual 5 Electrical Connection...
  • Page 79 5 Electrical Connection User Manual • Ensure that the inner depth L of the socket used is not less than 28mm. • When securing the wires to the corresponding terminals, make sure the wires do not lean forward, backward, leftward, or rightward. •...

  • Page 80: Dc Cable Connection

    User Manual 5 Electrical Connection step 12 Remove the limit rod and place it in place. Close the junction box and tighten the two screws on its front cover with the hexagon socket wrench provided. step 13 - - End 5.7  ...
  • Page 81 5 Electrical Connection User Manual WARNING • Make sure the PV array is well insulated to ground before connecting it to the inverter. • Make sure the maximum DC voltage and the maximum short circuit current of any string never exceed inverter permitted values specified in "Technical Data". •...

  • Page 82: Pv Input Configuration

    User Manual 5 Electrical Connection 5.7.1 PV Input Configuration • As shown in the figure below, the inverter is provided with multiple PV inputs, each PV input is designed with an MPP tracker. • Each PV input operates independently and has its own MPPT. In this way, string structures of each PV input may differ from each other, including number of PV modules in each string, angle of tilt, and installation orientation.

  • Page 83: Assembling Pv Connectors

    • If the cross-sectional area of the DC cable is 10mm , users need to prepare the PV connector by themselves or order it from SUNGROW. The recommended model of the female cable connector is PV-KBT4-EVO 2 / 10II-UR (Stäubli), and the recom­...
  • Page 84 User Manual 5 Electrical Connection step 1 Strip the insulation from each DC cable by 8 mm ~ 10 mm. step 2 Assemble the cable ends with the crimping pliers. 1: Positive crimp contact 2：Negative crimp contact step 3 Lead the cable through the cable gland, and insert the crimp contact into the insulator until it snaps into place.

  • Page 85: Installing Pv Connector

    5 Electrical Connection User Manual step 5 Check for polarity correctness. NOTICE If the PV polarity is reversed, the inverter will be in a fault or alarm state and will not operate normally. - - End 5.7.3 Installing PV Connector step 1 Ensure that the DC switch is in "OFF"...

  • Page 86: Wiring Of Tracking System Power Cable

    User Manual 5 Electrical Connection step 3 Connect the PV connectors to corresponding terminals until there is an audible click. step 4 Follow the foregoing steps to connect PV connectors of other PV strings step 5 Seal any unused PV terminal with a terminal cap. NOTICE Turn the corresponding DC switch to "ON"...
  • Page 87 5 Electrical Connection User Manual step 3 Lead the cable with the protective layer removed through the sealing ring. Retain 50 mm of cable with the protective layer in the AC junction box. step 4 Stack the OT terminals on the OT/DT terminals of the AC cables, and fix the cables to corresponding terminals.

  • Page 88: Rs485 Connection(Com1)

    User Manual 5 Electrical Connection The tracking power cable can be installed in any two phases among L1/L2/L3. step 5 Close the protection cover. Close the junction box and tighten the two screws on its front cover with supplied Allen wrench. - - End Protection devices required between the inverter and the tracking system control box: disconnector switch (≥...

  • Page 89: Rs485 Communication System

    5 Electrical Connection User Manual table 5-5 COM1 Terminal Definition Port Definition Description RS485A IN, RS485 differential sig­ nal+ RS485A IN, RS485 differential sig­ Used for cascading in­ nal+ verters or connecting to RS485_1 devices such as the Data RS485B OUT, RS485 differential Logger.

  • Page 90: Connection Procedure

    User Manual 5 Electrical Connection Multi-inverter Communication System In case of multiple inverters, all the inverters can be connected via RS485 cables in the daisy chain manner. The communication cable of the tracking system can be connected to the port RS485_2 of any inverter in the daisy chain.
  • Page 91 5 Electrical Connection User Manual step 3 Select a seal according to the cable outer diameter. Lead the cable through the swivel nut, seal and the cable gland. step 4 Strip the protective layer and the insulation layer of the cable to proper length. step 5 Secure the wires to corresponding terminals.
  • Page 92 User Manual 5 Electrical Connection step 6 Pull cables outwards to confirm whether they are fastened firmly, then tighten the swivel nut with appropriate torque. step 7 Remove the waterproof lid from the communication terminal COM1. step 8 Insert the connector into the communication terminal.

  • Page 93: Plc Communication Connection

    9 Seal the vacant cable hole with a waterproof plug. - - End 5.10   PLC Communication Connection With a PLC communication module built inside, the inverter can communicate with the Data Logger provided by SUNGROW. For specific wiring method, refer to the user manual for the data logger.

  • Page 94: Application Scenarios

    User Manual 5 Electrical Connection • The Data Logger is an optional device that can be ordered from SUNGROW. • The Data Logger conducts data communication by directly using the AC output cable of the inverter and thus saves the trouble to lay and maintain the special communication cables.
  • Page 95 5 Electrical Connection User Manual figure 5-5 PLC wiring diagram for a double-winding transformer figure 5-6 PLC wiring diagram for a double-split transformer Description of parameters in the diagrams is listed in the table below.

  • Page 96: Ac Wring Rules

    User Manual 5 Electrical Connection Para­ Descrip­ Cable Specification Remarks meter tion Length of • Use outdoor UV-resistant PLC ca­ multi-core copper AC ca­ ble from ble with a core diameter commu­ of 2.5mm²~10mm². nication • Cable isolation voltage >1000V. box-type •...
  • Page 97 5 Electrical Connection User Manual • Requirements for AC wiring under the same box-type transformer 1 Only AC cables under the same box-type transformer can be laid in the cable trench. Diagram of AC wiring under the same box-type transformer is shown below. figure 5-7 Diagram of AC wiring under the same box-type transformer 2 Cables can be laid in the cable trench in parallel, which however should not get entan­...
  • Page 98 User Manual 5 Electrical Connection - In the case of two cables laid parallel to each other, the horizontal spacing between them should be >3m. figure 5-10 Horizontal spacing between AC cables (in parallel) - In the case of two cables laid crosswise, the angle formed should fall in the range of 60°-120°...
  • Page 99 5 Electrical Connection User Manual 1 LV-side AC cables of different box-type transformers should be laid in their own cable trenches. Diagram of AC wiring under different box-type transformers is shown below. figure 5-12 Diagram of AC wiring un­ der different box-type transformers 2 Requirements for spacing between LV-side cable trays of different box-type transform­...
  • Page 100 User Manual 5 Electrical Connection - In the case of two cables laid parallel to each other, the horizontal spacing between them should be >3m. figure 5-13 Horizontal spacing between AC cables (in parallel) - In the case of two cables laid crosswise, the angle formed should fall in the range of 60°-120°...

  • Page 101: Plc Wiring

    5 Electrical Connection User Manual instance, for an 8-branch busbar, the coupling point is suggested to be set corresponding to the 4th or 5th branch busbar; while for a 9-branch busbar, it is suggested to be set cor­ responding to the 5th branch busbar. 3 Use multi-core copper AC cable with a core diameter of ≥2.5mm².
  • Page 102 User Manual 5 Electrical Connection 4 Connect the cable to the corresponding terminal, as shown in the figure below. figure 5-15 Three-phase three-wire method The coupling point for connecting the PLC cable to the box-type transformer bus­ bar is recommended to be arranged in the position corresponding to the middle of the busbar.

  • Page 103: Commissioning

    After inspections, go through again the commissioning procedure. If the indicator is still not on, turn off the auxiliary switch and contact SUNGROW for technical support.
  • Page 104 User Manual 6 Commissioning step 4 Turn the auxiliary switch on the inverter to “OFF”. NOTICE • Please follow the above steps strictly in order. Otherwise, the product may get dam­ aged, and the loss caused will not be covered by the warranty. •...
  • Page 105 6 Commissioning User Manual step 8 The home page is automatically displayed when the setting is completed. The indicator is steady blue, and the inverter is in grid-connected operation. WARNING It is strictly forbidden to close the DC switch if the inverter is in grid-connected status. Otherwise, the inverter may be damaged due to the lack of insulation impedance detec­...

  • Page 106: Isolarcloud App

    7   iSolarCloud App 7.1   Brief Introduction The iSolarCloud App can establish communication connection to the inverter via the Bluetooth, thereby achieving near-end maintenance on the inverter. Users can use the App to view basic information, alarms, and events, set parameters, or download logs, etc. Screenshots in this manual are based on the Android system V2.1.6 , and the actual interfaces may differ.

  • Page 107: Login

    7 iSolarCloud App User Manual 7.3   Login 7.3.1 Requirements The following requirements should be met: • The AC or DC side of the inverter is powered-on. • The mobile phone is within 5 meters away from the inverter and there are no obstructions in between.
  • Page 108 User Manual 7 iSolarCloud App figure 7-1 Bluetooth Connection step 3 Enter the identity verification interface after the Bluetooth connection is established.
  • Page 109 To set inverter parameters related to grid protection and grid support, contact your dis­ tributor to obtain the advanced account and corresponding password. If the distributor is unable to provide the required information, contact SUNGROW. step 4 If the inverter is not initialized, you will enter the quick setting interface of initializing protection parameters.

  • Page 110: Function Overview

    User Manual 7 iSolarCloud App step 5 After finishing the settings, tap TUNR ON DEVICE at the upper right corner and the device will be initialized. The App will send start instructions and the device will start and operate. step 6 If the inverter is initialized, the App automatically turns to its home page. - - End 7.4  ...
  • Page 111 7 iSolarCloud App User Manual figure 7-5 Home Page table 7-1 Home Page Description Designation Description Date and time System date and time of the inverter Present operation state of the inverter. For details, refer to Inverter state table 7-2 Description of Inverter State.

  • Page 112: Run Information

    User Manual 7 iSolarCloud App table 7-2 Description of Inverter State State Description After being energized, inverter tracks the PV arrays’ maximum power point (MPP) and converts the DC power into AC power. This is the normal op­ eration mode. Stop Inverter is stopped.
  • Page 113 7 iSolarCloud App User Manual table 7-4 Run Information Classifica­ Parameter Name Description tion String n Voltage The input voltage of String n PV Informa­ tion String n Current The input current of String n Total On-grid Run­ ning Time Daily On-grid Run­...

  • Page 114: Records

    User Manual 7 iSolarCloud App Classifica­ Parameter Name Description tion Phase C Current 7.7   Records Tap Records on the navigation bar to enter the interface showing event records, as shown in the following figure. figure 7-6 Records Fault Alarm Record Tap Fault Alarm Record to enter the interface, as shown in the following figure.
  • Page 115 7 iSolarCloud App User Manual figure 7-8 Detailed Fault Alarm Information Yield Record Tap Yield Record to enter the interface showing daily power generation as shown in the fol­ lowing figure. figure 7-9 Power Curve The App displays power generation records in a variety of forms, including daily power gen­ eration histogram,, monthly power generation histogram, annual power generation histogram and total power generation histogram.

  • Page 116: Event Record

    User Manual 7 iSolarCloud App Parameter Description Daily yield his­ Shows the power output every day in the present month. togram Monthly yield his­ Shows the power output every month in a year. togram Annual yield his­ Shows the power output every year. togram Tap the time bar on the top of the interface to select a time segment and view the corresponding power curve.

  • Page 117: Software Version

    7 iSolarCloud App User Manual figure 7-11 System Parameters * The image shown here is for reference only. Boot/Shutdown Tap Boot/Shutdown to send the boot/shutdown instruction to the inverter. Date Setting/Time Setting The correct system time is very important. Wrong system time will directly affect the data logging and power generation value.

  • Page 118: Power Regulation Parameters

    User Manual 7 iSolarCloud App figure 7-13 Fault Recovery table 7-6 Fault Recovery Settings Parameter Description Used to decide whether the inverter can start up without manual intervention after a fault event. Auto Fault Recovery Enabled: The inverter can resume normal operation without manual intervention.
  • Page 119 7 iSolarCloud App User Manual figure 7-15 Active Power Regulation table 7-7 Active Power Regulation Definition/Setting Descrip­ Parameter Range tion The switch for enabling/dis­ Active Power Soft Start abling the soft start function af­ Enable/Disable after Fault ter a fault occurs. Time that the soft start takes to Active Power Soft Start raise the power from 0 to 100%...

  • Page 120: Reactive Power Regulation

    User Manual 7 iSolarCloud App Definition/Setting Descrip­ Parameter Range tion Switch used to ensure that the inverter operates at the maxi­ 100% Scheduling mum active power when the ac­ Enable/Disable achieve active overload tive power limit ratio is set over 100%.
  • Page 121 7 iSolarCloud App User Manual Definition/Setting Descrip­ Parameter Range tion Reactive power regulation Switch for selecting reactive Off/PF/Qt/Q(P)/Q(U) mode power regulation mode The inverter provides the reactive power regulation function. Enable this function under Reac­ tive Power Regulation Mode and select the appropriate mode. table 7-9 Reactive Power Regulation: Mode Descriptions...
  • Page 122 User Manual 7 iSolarCloud App Parameter Definition/Setting Description Range Output power at P2 on the Q(P) mode curve QP_P2 20% ~ 100% (in percentage) Output power at P3 on the Q(P) mode curve QP_P3 20% ~ 100% (in percentage) QP_K1 Power factor at P1 on the Q(P) mode curve Curve A/C: 0.8 ~ 1 Curve B: [-0.600~0­...
  • Page 123 7 iSolarCloud App User Manual Parameter Definition/Setting Description Range Voltage hysteresis ratio on the Q(U) mode Hysteresis Ratio 0 ~ 5% curve Grid voltage limit at P1 on the Q(U) mode QU_V1 80% ~ 100% curve [-60.0%-0]* Over­ QU_Q1 Value of Q/Sn at P1 on the Q(U) mode curve load Rate/ 1000 Grid voltage limit at P2 on the Q(U) mode QU_V2...

  • Page 124: Communication Parameters

    User Manual 7 iSolarCloud App figure 7-18 Q(U) Curve 7.8.4 Communication Parameters Serial Port Parameters Tap Settings > Communication Parameters > Serial Port Parameters to enter the corre­ sponding interface, as shown in the following figure. figure 7-19 Serial Port Parameters table 7-12 Serial Port Parameters Parameter Range...

  • Page 125: Firmware Update

    7 iSolarCloud App User Manual figure 7-20 MPLC Parameters table 7-13 MPLC Parameters Parameter Range Band Num Band1, Band2,Band1 by default Array ID 1 ~ 255; 2 by default Winding ID 1 ~ 10; 1 by default 7.8.5 Firmware Update To avoid download failure due to poor on-site network signal, it is recommended to download the firmware package to the mobile device in advance.

  • Page 126: Password Changing

    User Manual 7 iSolarCloud App step 8 Tap the upgrade package file, a prompt box will pop up asking whether to upgrade the firmware with the file, tap CONFIRM to perform the firmware upgrade. step 9 Wait for the file to be uploaded. When the upgrade is finished, a message is displayed indicating that the upgrade is completed.

  • Page 127: Troubleshooting And Maintenance

    App or the LCD. Modify the overvoltage protection values with the consent of the local electric power operator. 3. Contact Sungrow Customer Service if the pre­ ceding causes are ruled out and the fault persists. Generally, the inverter will be reconnected to the grid after the grid returns to normal.
  • Page 128 2. Check whether the protection parameters are appropriately set via the App or the LCD. 3. Contact Sungrow Customer Service if the pre­ ceding causes are ruled out and the fault persists. Generally, the inverter will be reconnected to the grid after the grid returns to normal.
  • Page 129 App or the LCD. 3. Contact Sungrow Customer Service if the pre­ ceding causes are ruled out and the fault persists. 1. Check whether the corresponding string is of re­...
  • Page 130 Alarm PV string and inverter DC input) is damaged. If so, replace the fuse. 4. Contact Sungrow Customer Service if the pre­ ceding causes are ruled out and the alarm persists. *The code 548 to code 563 are corresponding to string 1 to string 16 respectively.
  • Page 131 If so, replace the damaged ca­ ble and secure terminals to ensure a reliable con­ nection. 5. Contact Sungrow Customer Service if the pre­ ceding causes are ruled out and the fault persists. 1. Check whether the AC cable is correctly con­...
  • Page 132 2. Reconnect the communication cable of the me­ Alarm ter. 3. Contact Sungrow Customer Service if the pre­ ceding causes are ruled out and the alarm persists. 1. Check whether the output port is connected to actual grid. Disconnect it from the grid if so.
  • Page 133 635–638, 900, when necessary. 901, 910, 911, 3. If the fault persists, please contact Sungrow Power Customer Service. 1. Check whether the corresponding string is of re­ verse polarity. If so, disconnect the DC switch and adjust the polarity when the string current drops...
  • Page 134 DC side current drops below 0.5 A. 3. It is prohibited to power up the inverter again. Please contact Sungrow Customer Service. Contact SUNGROW if the measures listed in the “Troubleshooting Method” col­ umn have been taken but the problem persists.

  • Page 135: Maintenance

    • To avoid the risk of electric shock, do not perform any other maintenance opera­ tions beyond this manual. If necessary, contact SUNGROW for maintenance. Oth­ erwise, the losses caused is not covered by the warranty.

  • Page 136: Disconnecting Inverter

    User Manual 8 Troubleshooting and Maintenance NOTICE Touching the PCB or other static sensitive components may cause damage to the device. • Do not touch the circuit board unnecessarily. • Observe the regulations to protect against electrostatic and wear an anti-static wrist strap.

  • Page 137: Cleaning Air Inlet And Outlet

    8 Troubleshooting and Maintenance User Manual Item Method Period Check whether there is a fan alarm on the App. Check whether there is any abnormal Fans Once a year noise when the fan is rotating. Clean or replace the fans if necessary (see the following section).
  • Page 138 User Manual 8 Troubleshooting and Maintenance Fans inside the inverter are used to cool the inverter during operation. If the fans do not operate normally, the inverter may not be cooled down and inverter efficiency may decrease. Therefore, it is necessary to clean dirty fans and replace the broken fans in a timely manner. The operation procedure is as follows: step 1 Stop the inverter (see 8.2.2 Disconnecting...
  • Page 139 8 Troubleshooting and Maintenance User Manual step 4 Loosen screws on the sides of fans. step 5 Pull out the fans. Clean them with a soft brush or vacuum cleaner, and replace them when nec­ essary.

  • Page 140: Dc Switch Maintenance

    You can close the DC switch after the fault is cleared. step 3 In case of a fault inside the inverter, please contact SUNGROW for technical support. - - End 8.3   Inverter Disposal...

  • Page 141: Dismantling The Inverter

    8 Troubleshooting and Maintenance User Manual 8.3.1 Dismantling the Inverter CAUTION Risk of burn injuries and electric shock! After the inverter is powered off for 25 minutes, measure the voltage and current with professional instrument. Only when there is no voltage nor current can operators who wear protective equipment operate and maintain the inverter.
  • Page 142 User Manual 8 Troubleshooting and Maintenance WARNING Please scrap the inverter in accordance with relevant local regulations and standards to avoid property losses or casualties. NOTICE Some parts of the inverter may cause environmental pollution. Please dispose of them in accordance with the disposal regulations for electronic waste applicable at the in­ stallation site.

  • Page 143: Technical Data

    9   Appendix 9.1   Technical Data Parameters SG320HX-20 SG350HX-20 Input (DC) Max. PV input voltage 1500 V Min. PV input voltage / Start­ 500 V / 550 V up input voltage Nominal PV input voltage 1080 V MPP voltage range 500 V –...
  • Page 144 User Manual 9 Appendix Parameters SG320HX-20 SG350HX-20 Protection DC reverse connection pro­ tection AC short circuit protection Leakage current protection Grid monitoring Ground fault monitoring DC switch / AC switch Yes / No PV string current monitoring Q at night function Anti-PID and PID recovery Optional function...
  • Page 145 Q at night function, LVRT, HVRT,ac­ Grid Support tive & reactive power control and power ramp rate control,Q-U control, P-f control Parameters SG305HX Input (DC) Max. PV input voltage 1500 V Min. PV input voltage / Start­ 500 V / 550 V...
  • Page 146 User Manual 9 Appendix Parameters SG305HX DC reverse connection pro­ tection AC short circuit protection Leakage current protection Grid monitoring Ground fault monitoring DC switch / AC switch Yes / No PV string current monitoring Q at night function Anti-PID and PID recovery...

  • Page 147: 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 guar­ antee: • The free warranty period for the whole machine/components has expired.
  • Page 148 User Manual 9 Appendix https://en.sungrowpower.com/contactUS For detailed contact information, please visit:...
  • Page 149 Sungrow Power Supply Co., Ltd. www.sungrowpower.com...

This manual is also suitable for:

Sg320hx-20Sg350hx-20