Deye SUN-5K-SG - User Manual

The Deye 5KW Storage Inverter is a sophisticated device designed for managing and converting solar energy, offering robust functionality for both residential and commercial applications. This guide provides comprehensive instructions for its repair and maintenance, highlighting its modular design and the importance of precise handling during service.

Function Description

The Deye 5KW Storage Inverter primarily functions as a central unit for solar power systems, converting direct current (DC) generated by solar panels into alternating current (AC) suitable for household use or feeding into the grid. It also incorporates storage capabilities, allowing excess energy to be stored in batteries for later use, enhancing energy independence and reliability. The inverter is equipped with various protection mechanisms to ensure safe and efficient operation, including safeguards against DC input polarity reversal, insulation impedance faults, DC leakage current, ground faults, and AC overcurrents. It can operate in parallel mode, allowing multiple inverters to work together for increased power output and system redundancy. The device's control system monitors critical parameters such as bus voltage, AC line voltage, and frequency, adjusting its operation to maintain optimal performance and protect against anomalies. Its ability to manage both PV input and battery storage makes it a versatile solution for hybrid solar energy systems.

Usage Features

The inverter is designed for user-friendly operation, though its internal components require careful handling during maintenance. Key usage features include:

Error Code System: The inverter utilizes a detailed error code system (F-01 to F-64) to diagnose and indicate specific operational issues. These codes cover a wide range of faults, from DC input problems and memory errors to AC output issues and internal component failures. This system allows for quick identification of problems, facilitating efficient troubleshooting.
Parallel Operation: For systems requiring higher power output or enhanced reliability, the inverter supports parallel operation. This feature allows multiple Deye inverters to work in conjunction, sharing the load and providing a scalable energy solution.
Grid Interaction: The inverter is designed to interact seamlessly with the utility grid. It can feed excess solar energy into the grid, reducing electricity bills, and can also draw power from the grid when solar generation is insufficient or batteries are depleted.
Battery Management: A crucial feature is its integrated battery management, which allows for the storage of solar energy. This enables users to utilize stored energy during peak demand hours or at night, reducing reliance on the grid and improving energy self-consumption. The system monitors battery voltage and capacity, ensuring optimal charging and discharging cycles.
Safety Mechanisms: The inverter incorporates multiple safety features, such as protection against reverse polarity, ground faults (GFDI), and AC/DC overcurrents. These mechanisms are critical for protecting the device, the connected electrical system, and users from potential hazards.
Monitoring and Control: While not explicitly detailed in the provided text, the presence of a liquid crystal plate and the need for internal harness connections suggest that the inverter offers local monitoring and control capabilities, allowing users to view operational status and potentially adjust settings.

Maintenance Features

Maintenance of the Deye 5KW Storage Inverter is designed to be systematic, with a strong emphasis on safety and precision. The repair guide outlines several key maintenance features:

Modular Design: The inverter appears to have a modular internal structure, with components like the control board, power board, and various sensors being accessible for inspection and replacement. This modularity simplifies troubleshooting and component-level repairs.
Pre-Service Safety Protocols: Before any internal maintenance, strict safety protocols must be followed. This includes disconnecting all power cables (AC and DC) and waiting at least 5 minutes to allow internal capacitors to discharge, preventing electric shock.
Visual Inspection and Documentation: Technicians are instructed to take photos of the inverter's interior and record the location of each harness before disassembly. This practice is crucial for preventing errors during reassembly and ensuring all connections are correctly restored.
Component-Level Troubleshooting: The guide provides specific instructions for troubleshooting various components. For instance, in cases of DC leakage current, checking the battery fuse with a multimeter is recommended. For memory errors (EEPROM), restarting the inverter and, if the error persists, replacing the control board are suggested steps.
IGBT and Diode Testing: A significant portion of the maintenance guide focuses on testing IGBTs (Insulated Gate Bipolar Transistors) and diodes, which are critical power electronic components. The process involves using a multimeter in diode gear to measure voltage drops across these components. Specific voltage ranges (e.g., 0.405V for S-level, 0.450V for G-level in IGBTs, and 0.33V for Boost diodes) are provided as benchmarks. Deviations, especially values close to 0, indicate damage.
Associated Component Replacement: If an IGBT is found to be damaged, the corresponding drive components (e.g., optocouplers, resistors) also need to be measured or replaced. The guide emphasizes paying attention to the direction of these components and ensuring all damaged parts are replaced.
Post-Replacement Checks: After replacing components, a thorough check of internal inductors and other harnesses for breakage or direct contact with the shell is mandatory. Measuring the resistance between the inductor harness and the housing (which should be infinite) is a critical step to ensure proper insulation and prevent future faults.
Reassembly Instructions: The guide provides detailed steps for reassembling the inverter, including installing the control panel, plugging in harnesses, securing inductive wires, and connecting various cables (e.g., 60P gray line, battery discharge current cables, AC wire, yellow-green line). Attention to wire labels and PCB silk screen consistency is repeatedly stressed to ensure correct connections.
Final Testing: After reassembly, the inverter must be tested to confirm proper functionality. If problems persist, seeking assistance from Deye Service is recommended.
Environmental Considerations: For issues like heat sink high temperature failure, checking the work environment temperature and allowing the inverter to cool down by turning it off for 10 minutes are suggested, highlighting the importance of environmental factors in the inverter's operation.

In summary, the Deye 5KW Storage Inverter is a robust and repairable device, designed with an emphasis on diagnostic clarity and systematic maintenance procedures. Its comprehensive error code system, modular construction, and detailed repair instructions empower technicians to efficiently troubleshoot and restore the inverter to optimal working condition, ensuring reliable solar energy management.

Deye SUN-5K-SG Specifications

General

Type	Hybrid Inverter
Rated Power	5kW
Max. DC Input Power	6.5kW
Max. DC Input Voltage	500V
Number of MPPT Trackers	2
Nominal AC Output Power	5kW
Max. AC Output Power	5.5kW
AC Voltage Range	180-280V
THDi	<3%
AC Grid Frequency Range	50/60Hz
Battery Voltage Range	40-60V
Max. Charging Current	100A
Max. Discharging Current	100A
Protection Degree	IP65
Topology	Transformerless
Nominal AC Voltage	230 V
Power Factor	0.8 leading to 0.8 lagging
Communication	RS485
Cooling Method	Natural Cooling
Operating Temperature Range	-40~60°C