What to do if my Huawei SUN2000-36KTL Inverter shows String Reverse?
If your Huawei Inverter displays a 'String Reverse' error, it indicates that the PV string cables were connected incorrectly during installation. To resolve this: Wait for the PV string voltage to drop to a safe level (below 60V DC). Then, switch off both DC switches, disconnect the positive and negative connectors, and correct the cable connections.
Why is my Huawei SUN2000-36KTL Inverter showing an abnormal grid voltage?
This alarm may occur accidentally if the power grid is temporarily abnormal. The Huawei SUN2000 automatically recovers after detecting that the power grid becomes normal. This is due to the grid voltage being below the specified lower threshold.
How to fix high DC input voltage on Huawei SUN2000-36KTL Inverter?
This issue occurs when the PV array is not properly configured. Reduce the number of PV modules connected in series to PV strings 1 and 2 until the open-circuit voltage is less than or equal to the maximum inverter input voltage. After the PV array configuration is corrected, the Huawei SUN2000 alarm disappears.
What causes abnormal grounding in Huawei SUN2000-36KTL?
This issue may be due to the neutral wire or PGND cable not properly connected to the inverter, or the Huawei SUN2000 output side does not connect to an isolation transformer when the PV string output is grounded. Check that the neutral wire or PGND cable properly connects to the inverter. If the PV string output is grounded, check that the SUN2000 output side connects to an isolation transformer.
What does abnormal grid frequency mean on a Huawei SUN2000-36KTL?
If the alarm occurs accidentally, the power grid may be abnormal temporarily. The Huawei SUN2000 automatically recovers after detecting that the power grid becomes normal. This happens because the actual grid frequency is higher than the standard requirement for the local power grid.
How do I troubleshoot low insulation resistance on a Huawei SUN2000-36KTL Inverter?
Check the impedance between the PV string and the PGND cable. If a short circuit occurs, rectify the fault. If you are sure that the impedance is less than the default value in a cloudy or rainy environment, log in to the SUN2000 app, SmartLogger, or NMS and set Insulation resistance protection. A short circuit occurs between the PV string and the PGND cable.
What does abnormal DC circuit mean for Huawei SUN2000-36KTL?
The Huawei SUN2000 detects its external working conditions in real time. After the fault is rectified, the SUN2000 automatically recovers. This issue occurs when the SUN2000 input is disconnected accidentally, or the PV string output power changes sharply because the PV string is shielded from sunlight.
What causes a DC arc fault in my Huawei Inverter?
Check whether the PV string cable is in poor contact or with open circuits. If yes, reconnect the cable. The PV string cable is in poor contact or with open circuits.
Why is my Huawei Inverter showing a cabinet overtemperature warning?
Check the ventilation and ambient temperature of the Huawei SUN2000 installation position. If the ventilation is poor or the ambient temperature exceeds the upper threshold, improve the ventilation and heat dissipation. If the ventilation and ambient temperature both meet requirements, contact Huawei technical support. This issue occurs when the SUN2000 is installed in a place with poor ventilation, the ambient temperature exceeds the upper threshold, or the internal fan works abnormally.
What to do if string 1-8 reversed on Huawei SUN2000-36KTL Inverter?
Check whether the PV string is reversely connected to the Huawei SUN2000. If yes, wait until the solar irradiance declines at night and the PV string current reduces to below 0.5 A. Then, turn off the two DC switches and correct the PV string connection. Check whether the number of PV modules connected in series to the SUN2000 is small. If yes, increase the number. The PV string is reversely connected or only a few PV modules are connected in series to the PV string, and therefore the end voltage is lower than that of other PV strings.
Describes the SUN2000's installation, connections, commissioning, maintenance, and troubleshooting.
For photovoltaic plant personnel and qualified electrical technicians.
Defines symbols used throughout the document for warnings, notices, and notes.
Huawei's liability for consequences due to specific events like transportation or misuse.
Specifies qualifications and training for personnel operating the SUN2000.
Instructions on not tampering with warning labels and product nameplates.
Safety guidelines for installation, including power connection and environment.
Safety precautions during the operation of the SUN2000, including high voltage warnings.
Safety measures for maintenance and replacement tasks, including powering off.
Introduces the SUN2000 as a grid-tied PV string inverter and its function.
Details the physical dimensions and front view of the SUN2000 unit.
Explains the meaning of various symbols and labels found on the SUN2000 enclosure.
Explains the conceptual diagram and working modes (standby, operating, shutdown) of the SUN2000.
Procedures for checking outer packing materials and package contents before installation.
Lists the necessary tools required for installation and cable connections.
Instructions and requirements for mounting the SUN2000 onto a wall.
Instructions and requirements for mounting the SUN2000 onto a support structure.
Important safety warnings before connecting cables, especially regarding DC switches.
Prerequisites and procedure for safely opening the maintenance compartment door.
Detailed steps for connecting the protective ground cable (PE) to the SUN2000.
Guide on connecting the AC output power cables, including cable specifications and terminal connections.
Instructions for connecting DC input power cables, emphasizing safety and correct polarity.
Methods for connecting communication cables (RS485, FE) for monitoring and data transfer.
Procedure for correctly closing the maintenance compartment door after cable connections.
Pre-power-on checklist to ensure correct and secure installation and connections.
Step-by-step guide for powering on the SUN2000, including AC/DC switch operations.
Procedure for safely powering off the SUN2000, including shutdown commands.
How to export/import configurations, export data, and upgrade using a USB flash drive.
Reference to operations using a SmartLogger for system management.
Reference to operations using the Network Management System (NMS).
Guide to using the SUN2000 mobile application for device management.
Recommended maintenance schedule and checks for long-term operation.
Common alarms, their possible causes, and suggested troubleshooting measures.
Steps for safely disconnecting and removing the SUN2000 unit.
Instructions on how to pack the SUN2000 for storage or transport.
Guidelines for disposing of the SUN2000 at the end of its service life.
Technical data on maximum and European conversion efficiencies for different models.
Electrical input parameters including voltage, current, and power ratings.
Electrical output parameters such as active power, voltage, current, and harmonic distortion.
Details on various protection mechanisms implemented in the SUN2000.
General| Purpose | Solar panel |
|---|---|
| Efficiency | 98.8 % |
| Output power | 36000 W |
| Weatherproof | Yes |
| Certification | EN 62109-1/-2, IEC 62109-1/-2, EN 50530, IEC 62116, IEC 60068, IEC 61683 |
| Input voltage | 250 - 1100 V |
| Output voltage | 220/380, 230/400, 277/480 V |
| Input frequency | - Hz |
| Power supply type | Outdoor |
| Power current type | DC-to-AC |
| Adjustable output voltage | - |
| Power protection features | Over current |
| International Protection (IP) code | IP65 |
| Product color | White |
| Quantity per pack | 1 pc(s) |
| Operating temperature (T-T) | -25 - 60 °C |
| Operating relative humidity (H-H) | 0 - 100 % |
Weight and Dimensions| Depth | 283 mm |
|---|---|
| Width | 930 mm |
| Height | 550 mm |
| Weight | 62000 g |
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