What does Phase Wire Short-Circuited to PE mean on Huawei SUN2000-50KTL-JPM0?
If your Huawei Inverter shows 'Phase Wire Short-Circuited to PE', it means the impedance of the output phase wire to PE is low or short-circuited. Check the impedance of the output phase wire to PE to find the low impedance point and fix the fault.
How to fix Huawei Inverter High String Input Voltage?
If your Huawei Inverter displays 'High String Input Voltage', it indicates the PV array is incorrectly configured. Too many PV modules are connected in series, causing the PV string open-circuit voltage to exceed the SUN2000's maximum operating voltage. Reduce the number of PV modules connected in series until the PV string open-circuit voltage is within the limit. The alarm should then stop.
Why does my Huawei Inverter show Grid Overvoltage?
If a 'Grid Overvoltage' alarm appears on your Huawei Inverter, it means the grid voltage is too high. First, check if the grid connection voltage exceeds the upper threshold and contact the local power operator if it does. If you have confirmed the overvoltage and have consent from the power operator, you can modify the overvoltage protection threshold. Also, ensure the peak grid voltage does not exceed the upper threshold.
What causes Grid Undervoltage on a Huawei SUN2000-50KTL-JPM0?
If your Huawei Inverter shows a 'Grid Undervoltage' error, it means the grid voltage is too low. If this happens briefly, it might be a temporary grid issue, and the SUN2000 should recover automatically. If it happens often, check if the grid voltage is within the acceptable range; if not, contact your local power operator. If the voltage is within range, you might need to adjust the undervoltage protection threshold with the power operator's consent. Also, check the AC circuit breaker and AC output power cable if the problem continues.
How to troubleshoot Low Insulation Resistance on Huawei SUN2000-50KTL-JPM0 Inverter?
If your Huawei Inverter is showing 'Low Insulation Resistance', it could be because the PV string is short-circuited to PE or the power cable insulation to ground is poor due to moisture. Check the impedance between the PV string and the PE cable for any shorts and rectify them. Ensure the PE cable is correctly connected. If the impedance is low in cloudy or rainy conditions, you can reset the insulation resistance protection.
How to fix String Reverse Connection on Huawei SUN2000-50KTL-JPM0 Inverter?
If the Huawei Inverter shows 'String Reverse Connection', it means the PV string is connected backward. Wait until night when solar irradiance is low and the PV string current is less than 0.5 A. Then, turn off the two DC switches and correct the PV string connection.
What does Output DC Component Overhigh mean on Huawei Inverter?
If your Huawei Inverter displays 'Output DC Component Overhigh', it means the DC component of the output current is too high. If this is due to an external fault, the SUN2000 should recover automatically after the fault is resolved. If the alarm occurs frequently, contact Huawei technical support.
Why am I getting an Abnormal Grounding error on my Huawei SUN2000-50KTL-JPM0?
If your Huawei Inverter displays 'Abnormal Grounding', it could be due to a disconnected PE cable or the absence of an isolation transformer when the PV string output is grounded. Ensure the PE cable is properly connected. If the PV string output is grounded, verify that the SUN2000 output side connects to an isolation transformer.
How to troubleshoot String Current Backfeed on Huawei SUN2000-50KTL-JPM0 Inverter?
If your Huawei Inverter is showing 'String Current Backfeed', it could be because too few PV modules are connected in series, causing a lower end voltage than other strings, or the PV string is shaded. Check if the number of PV modules in series is less than other strings and add more if needed. Also, check the open-circuit voltage and ensure the PV string isn't shaded.
Why does my Huawei SUN2000-50KTL-JPM0 show Grid Overfrequency?
If your Huawei Inverter is showing 'Grid Overfrequency', it indicates the grid frequency is too high. If this is a one-time occurrence, it might be a temporary grid issue, and the SUN2000 should recover automatically. If it happens frequently, check if the grid frequency is within the acceptable range; if not, contact your local power operator. If it is within range, you may need to adjust the overfrequency protection threshold with their consent.
General| Model | SUN2000-50KTL-JPM0 |
|---|---|
| Type | String Inverter |
| Max. DC Voltage | 1100 V |
| Maximum DC Input Voltage | 1100 V |
| Start Voltage | 200 V |
| Input Voltage Range | 200 V - 1000 V |
| Number of MPPTs | 4 |
| Rated AC Power | 50000 W |
| Rated Output Power | 50000 W |
| Rated AC Voltage | 400 V |
| Rated Output Voltage | 400 V |
| Output Frequency | 50 Hz / 60 Hz |
| Max Efficiency | 98.6% |
| European Efficiency | 98.2% |
| Operating Temperature Range | -25 °C to +60 °C |
| Protection Degree | IP65 |
| Max. DC Power | 50 kW |
| MPPT Voltage Range | 200 V - 1000 V |
| Max. AC Power | 50 kW |
| Maximum Output Power | 55000 W |
Provides general safety guidelines, operational disclaimers, and personnel requirements.
Covers safety during installation, electrical connections, and maintenance.
Details environment, structure, and space requirements for mounting.
Steps for support-mounted and wall-mounted bracket installation.
Step-by-step guide for physically installing the inverter unit.
Crucial safety warnings before making electrical connections.
Instructions for connecting AC output power cable, including wiring.
Guides on connecting DC input power cables and precautions.
Instructions for installing RS485 and RJ45 communication cables.
Checklist for pre-power-on verification of the SUN2000.
Procedure for safely powering on the SUN2000 and connecting the app.
Procedure for safely powering off the SUN2000 and its precautions.
Lists common alarms, their causes, and troubleshooting measures.
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