What to do if Huawei Inverter upgrade failed?
If your Huawei Inverter displays an upgrade failure or version mismatch, try performing the upgrade again. If it fails multiple times, contact your dealer or Huawei technical support.
What to do if Huawei Inverter shows grid loss?
If your Huawei Inverter displays a grid loss alarm, it means a power grid outage has occurred, or the AC circuit is disconnected, or the AC switch is off. The alarm should clear automatically once the power grid recovers. You can also check if the AC circuit is disconnected or the AC switch is off.
Why does my Huawei Inverter show high string input voltage?
If your Huawei Inverter is showing a high string input voltage, it's likely that the PV array isn't configured correctly, meaning too many PV modules are in series, causing the PV string open-circuit voltage to exceed the inverter's maximum. To fix this, reduce the number of PV modules in series until the PV string open-circuit voltage is at or below the inverter's maximum. The alarm should then disappear.
How to fix low insulation resistance on Huawei SUN2000 MB0?
A low insulation resistance warning on your Huawei Inverter indicates that the PV array may be short-circuited with PE, or the PV string has been in a moist environment for an extended period, leading to poor insulation to ground. First, check the impedance between the PV string and the PE cable for any short circuits and correct them. Also, check the PE cable connection of the inverter. If the impedance is lower than the specified threshold during cloudy or rainy conditions, you can adjust the insulation resistance protection threshold via the app, SmartLogger, or NMS.
What causes grid overvoltage on Huawei Inverter?
A grid overvoltage alarm on your Huawei Inverter means the power grid voltage is too high or has exceeded the limit for too long. If it's occasional, it might be a temporary grid issue, and the inverter should recover automatically. If it persists, check if the power grid voltage is within the acceptable range and contact your local power operator if it isn't. If the voltage is fine, you can modify the grid overvoltage protection threshold via the app, SmartLogger, or NMS with the power operator's consent. Also, check for high peak voltage in the power grid; if the alarm continues long-term, contact the local power operator.
Why is my Huawei Inverter showing grid undervoltage?
A grid undervoltage alarm on your Huawei Inverter indicates that the power grid voltage is too low or has been low for too long. If it happens occasionally, it could be a temporary issue, and the inverter should recover automatically. If the alarm persists, check if the power grid voltage is within the acceptable range and contact the local power operator if it’s not. If the voltage is okay, you can modify the grid undervoltage protection threshold via the app, SmartLogger, or NMS, with the consent of the local power operator. Finally, check the AC circuit breaker and AC output power cable if the alarm continues.
What does abnormal grounding mean on a Huawei SUN2000 MB0?
An abnormal grounding alert on your Huawei Inverter suggests that the neutral wire or PE cable isn't connected, or the output mode doesn't match the cable setup. Power off the inverter first (turn off the AC output and DC input switches, and wait). Then: 1. Check the PE cable connection. 2. If using a TN power grid, check the neutral wire connection and voltage to ground. 3. After powering on, ensure the inverter's output mode matches the cable connection.
How to troubleshoot DC arc fault on Huawei SUN2000 MB0?
A DC arc fault on your Huawei Inverter means the PV string power cables are arcing or have poor contact. You should check the PV string cables to see if they are arcing or poorly connected.
What to do if Huawei SUN2000 MB0 Inverter shows string reverse connection?
If your Huawei Inverter reports a string reverse connection, it means the PV string polarity is reversed. Wait until night when solar irradiance decreases and the PV string current drops below 0.5 A. Then, turn off the DC switch and correct the PV string connection.
Why is my Huawei SUN2000 MB0 Inverter showing cabinet overtemperature?
A cabinet overtemperature warning on your Huawei Inverter indicates poor ventilation, a high ambient temperature, or improper inverter operation. Check the ventilation and ambient temperature where the inverter is installed. If ventilation is poor or the temperature is too high, improve ventilation and heat dissipation. If both are fine but the alarm persists, contact your dealer or Huawei technical support.
General| Type | String Inverter |
|---|---|
| Max Input Voltage | 1100 V |
| MPPT Voltage Range | 200 V - 1000 V |
| Number of MPPTs | 2 |
| Max Input Current per MPPT | 26 A |
| Rated Output Frequency | 50 Hz / 60 Hz |
| Max Efficiency | 98.6% |
| Operating Temperature Range | -25°C to +60°C |
| Protection Degree | IP65 |
| Cooling | Natural Convection |
| Power Factor Adjustment Range | 0.8 leading to 0.8 lagging |
| Cooling Method | Natural Convection |
| Protection Level | IP65 |
| Model | SUN2000 |
| Rated Output Voltage | 230 V / 400 V |
| Humidity | 0% - 100% |
| Communication | RS485 |
Describes inverter models, safety, installation, and specifications.
Identifies who the manual is for, including installers and users.
Defines symbols used in the document for warnings and notes.
Details changes made between document issues.
General safety statements and company liability.
Precautions for personal safety and electrical operations.
Safe installation environments and mechanical handling precautions.
Safe procedures for moving, using ladders, and hoisting.
Explains the product model naming convention.
Describes networking configurations and supported power grid types.
Shows physical appearance, ports, explains LEDs, and describes operating modes.
Explains labels and warnings on the inverter enclosure.
Describes installation types and site/position selection criteria.
Specifies installation clearances, angle, and lists required tools.
Procedures for checks, moving the inverter, and packing.
Step-by-step guides for wall and support mounting the inverter.
Safety precautions and instructions for preparing cables for connection.
Procedure for connecting the protective earthing (PE) cable.
Steps for connecting the AC output power cable.
How to connect RS485, rapid shutdown, grid scheduling, and NS protection signal cables.
Checklist before power-on and step-by-step guide to powering on the inverter.
Steps to download app, register accounts, and create a plant.
How to set inverter parameters like grid-tied point control.
Arc Fault detection and how to view plant status in the app.
Procedures for safely powering off the system and routine maintenance.
Common alarms, possible causes, and troubleshooting steps.
Steps for handling, removing, packing, disposing, and replacing inverter parts.
Technical data for specific MB0-ZH inverter models.
Technical data for MB0 inverter models.
General physical specs and wireless communication parameters.
Accessing the device commissioning screen via app.
Connecting to inverter WLAN and logging in as installer.
Displays details of insulation resistance alarms and fault location.
Describes various methods to trigger rapid shutdown.
Definition of Arc-Fault Circuit Interrupter.
Definition of Light Emitting Diode.
Definition of Maximum Power Point.
Definition of Maximum Power Point Tracking.
Definition of Protective Earthing.
Definition of Potential Induced Degradation.
Definition of Photovoltaic.
To Next Page