What to do if my Hoymiles Inverter has a firmware error?
Check if the Hoymiles Inverter firmware is correct and has been upgraded. Then, check the communication between the DTU and the Hoymiles monitoring system, and between the DTU and the microinverter. Try again after checking the communication. If the fault persists, further assistance may be needed.
What to do if my Hoymiles Inverter shows grid overvoltage?
If the Hoymiles Inverter alarm occurs occasionally, the grid voltage may be temporarily abnormal, and the microinverter should automatically recover once the grid voltage returns to normal. If the alarm occurs frequently, verify that the grid voltage is within the acceptable range. If it's not, contact your local power operator or, with their consent, adjust the grid overvoltage protection limit in the grid profile via the Hoymiles monitoring system.
What to do if my Hoymiles HMS-2000-4T shows 10 min value grid overvoltage?
If the Hoymiles Inverter alarm occurs occasionally, the grid voltage may be temporarily abnormal, and the microinverter should automatically recover once the grid voltage returns to normal. If the alarm occurs frequently, verify that the grid voltage is within the acceptable range. If it's not, contact your local power operator or adjust the grid overvoltage protection limit via Hoymiles monitoring system with their consent.
Why is my Hoymiles HMS-2000-4T Inverter offline?
First, ensure the Hoymiles microinverter is working correctly by checking if the DC voltage is within the normal range and confirming the LED indicator status. Next, verify that the serial number (SN) on the microinverter label matches the one on the monitoring platform. Then, check the communication status between the DTU and the Hoymiles monitoring system, as well as between the DTU and the microinverter. If the communication is poor, try to improve it. If the alarm persists and cannot be resolved, further assistance may be needed.
How to troubleshoot over temperature protection on a Hoymiles HMS-2000-4T?
Check the ventilation and ambient temperature at the Hoymiles microinverter's installation location. If ventilation is poor or the ambient temperature exceeds the limit, improve ventilation and heat dissipation. If the problem persists with adequate ventilation and temperature, further assistance may be needed.
What to do if my Hoymiles HMS-2000-4T Inverter was shut down by remote control?
Check the status of zero export management and whether the Hoymiles microinverters were manually shut down. If the alarm still persists, further assistance may be needed.
What to do if there is a grid configuration parameter error on my Hoymiles Inverter?
Check if the grid configuration parameter is correct and upgrade it. If the fault still exists, further assistance may be needed.
This document describes the Hoymiles Single-phase Microinverter, specifically the HMS-1600-4T, HMS-1800-4T, and HMS-2000-4T models. These microinverters are designed to convert direct current (DC) from photovoltaic (PV) modules into alternating current (AC) for feeding into the public grid. The system is configured for 4-in-1 microinverters, meaning each microinverter connects to four PV modules.
The core function of the Hoymiles microinverter system is to facilitate the generation of electricity from solar panels and integrate it into the power grid. Each microinverter operates independently, ensuring that the maximum power is generated from each individual PV module. This independent operation is crucial for system reliability and flexibility, as it means that if one PV module fails or is shaded, the performance of other modules in the array will not be affected. This module-level Maximum Power Point Tracking (MPPT) boosts the overall power production of the system.
The microinverter continuously monitors the current, voltage, and power of each connected module, enabling detailed module-level data monitoring. This granular monitoring capability allows for precise performance tracking and easier identification of issues. A significant safety feature of these microinverters is that they operate with a low DC voltage (less than 80 volts), which substantially reduces potential safety hazards compared to higher voltage systems.
For data collection and system oversight, Hoymiles microinverters utilize a wireless transmission system to send data to a Hoymiles Data Transfer Unit (DTU). The DTU then relays this information to the Hoymiles monitoring platform, S-Miles Cloud, providing users with comprehensive insights into their system's performance.
The Hoymiles microinverter system is designed for straightforward installation and robust operation. The microinverters are typically installed underneath PV modules to ensure they remain in the shade, preventing power derating due to increased internal temperature. Proper ventilation and a minimum clearance of 2 cm around the enclosure are required for optimal heat dissipation.
The system employs Sub-1G wireless technology for communication with the DTU. This technology offers several advantages over 2.4 GHz bands like Wi-Fi or Zigbee, including a substantially longer transmission range (1.5 to 2 times greater) and enhanced interference suppression performance. This makes Sub-1G particularly well-suited for industrial or commercial PV power plants and rooftop installations where stable communication over distance is essential. Additionally, Sub-1G wireless communication is more power-efficient, contributing to lower overall system consumption.
The microinverters are housed in an IP67 (NEMA 6) enclosure, providing high reliability and protection against environmental factors. They also feature 6000 V surge protection, enhancing their durability and lifespan. The power factor is adjustable, ranging from 0.8 leading to 0.8 lagging, offering flexibility for grid integration requirements.
Installation involves marking positions on the rail, fixing screws, and then hanging and tightening the microinverter. Grounding can be achieved directly through the AC cable, which contains an earth wire, or via optional grounding brackets for regions with specific requirements. The AC Trunk Cable, which connects the microinverters to the power distribution box, is selected based on the spacing between microinverters to ensure proper matching of connectors. The process includes disassembling, preparing, and installing segments of the AC Trunk Cable, ensuring proper wire insertion (L, N, PE) and tightening of screws and caps for water and dust proofing. Once the AC connections are complete and PV modules are connected, the system is energized by turning on the AC breakers, and power generation typically begins within two minutes. A dedicated monitoring system is then set up using the DTU and S-Miles Cloud platform.
Routine maintenance of the Hoymiles microinverter system is crucial for ensuring its long-term performance and safety. Maintenance operations should only be carried out by authorized and trained personnel who are responsible for reporting any anomalies. Personal protective equipment, such as gloves and goggles, must be used during maintenance.
Regular checks of environmental conditions are recommended to ensure they remain suitable and that the equipment is not obstructed or exposed to adverse weather. If any operational anomalies are detected, the equipment should not be used until the fault is fixed and working conditions are restored. Annual inspections of various components are advised, along with cleaning the equipment using a vacuum cleaner or special brushes. It is explicitly stated that cleaning should not be done with rags made of filamentary or corrosive materials to prevent corrosion and electrostatic charges.
Troubleshooting guidance is provided through a list of alarm codes and corresponding handling suggestions. These suggestions range from checking ventilation and ambient temperature for over-temperature protection alarms to verifying grid configuration parameters for grid-related errors. For communication issues, checking DTU and monitoring system connections, as well as firmware status, is recommended. In cases of input overvoltage or undervoltage, checking the PV module's open-circuit voltage is advised. For device failures or persistent issues, contacting the dealer or Hoymiles technical support team is the recommended course of action.
A critical safety instruction is that users should not attempt to dismantle or repair the microinverter themselves, as there are no user-serviceable parts inside for safety and insulation reasons. All repairs must be performed by a licensed contractor or authorized Hoymiles service representative using qualified spare parts. If the AC output wiring harness (AC drop cable) is damaged, the equipment should be scrapped as it cannot be replaced. Maintenance operations must always be carried out with the equipment disconnected from the grid (power switch open) and the PV modules shaded or isolated, unless otherwise specified.
For microinverter replacement, the process involves de-energizing the AC branch circuit breaker, removing and covering the PV module, checking for current in DC wires, disconnecting DC and AC connectors, loosening fixing screws, and finally removing the microinverter from the racking. On the monitoring platform, the new microinverter's serial number is inputted to update the station. The DTU-Pro-S, when connected to all microinverters, can limit the output power imbalance between phases if required, further enhancing system stability and compliance.
When decommissioning, the inverter should be disconnected from DC input and AC output, all cables removed, and then the microinverter removed from its frame. It should be packed in its original packaging or a suitable carton box for storage and transportation. The storage temperature range is -40 to 85°C. Proper disposal of microinverters in accordance with local regulations is emphasized to prevent environmental harm.
General| Output current | 8.7 A |
|---|---|
| Charging voltage | 230 - 275 V |
| Operating temperature (T-T) | -40 - 65 °C |
Weight and Dimensions| Depth | 34.6 mm |
|---|---|
| Width | 331 mm |
| Height | 218 mm |
| Weight | 4700 g |
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