What to do if Huawei Inverter shows 'Grid Loss'?
If your Huawei Inverter displays a 'Grid Loss' alarm, it indicates a power grid outage, a disconnected AC circuit, or a turned-off AC switch. 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 is my Huawei Inverter showing 'High string input voltage'?
The 'High string input voltage' error on your Huawei Inverter means the PV array isn't configured correctly. There are too many PV modules connected in series, causing the PV string open-circuit voltage to exceed the inverter's maximum operating voltage. To fix this, reduce the number of PV modules connected in series until the PV string open-circuit voltage is at or below the maximum inverter operating voltage. The alarm should then disappear.
What to do if my Huawei SUN2000-40KTL-M3 Inverter displays 'DC arc fault'?
If your Huawei Inverter is showing a 'DC arc fault', it means the PV string power cables are arcing or have poor contact. You should check the PV string cables for arcing or poor connections.
What causes 'String reverse connection' in Huawei Inverter and how to fix it?
The 'String reverse connection' error in your Huawei Inverter means the PV string polarity is reversed. To resolve this, wait until night when solar irradiance decreases and the PV string current drops below 0.5 A. Then, turn off both DC switches and correct the PV string connection.
Why does my Huawei Inverter show 'Grid overvoltage'?
A 'Grid overvoltage' alarm on your Huawei Inverter indicates that the power grid voltage exceeds the upper threshold, or the high voltage duration has exceeded the value specified by HVRT. If the alarm is occasional, the power grid may be temporarily abnormal, and the inverter should recover automatically. If the alarm persists, check if the power grid frequency is within the acceptable range, and contact the local power operator if it is not. If the frequency is normal, consider modifying the grid overfrequency protection threshold through the app, SmartLogger, or NMS with the consent of the local power operator. Also, check whether the peak voltage of the power grid is too high, and if the alarm persists long-term, contact the local power operator.
Why is my Huawei SUN2000-40KTL-M3 Inverter showing 'Grid undervoltage'?
A 'Grid undervoltage' alarm on your Huawei Inverter means the power grid voltage is below the lower threshold, or the low-voltage duration has exceeded the value specified by LVRT. If the alarm occurs occasionally, the power grid may be temporarily abnormal, and the inverter should recover automatically. If it persists, verify that the power grid voltage is within the acceptable range and contact your local power operator if it's not. If the voltage is within range, you might need to modify the grid undervoltage protection threshold using the app, SmartLogger, or NMS, but only with the consent of the local power operator. Finally, check the AC circuit breaker and AC output power cable if the alarm continues.
What causes 'String current backfeed' on a Huawei Inverter?
The 'String current backfeed' error on your Huawei Inverter is caused by an insufficient number of PV modules connected in series to the PV string, resulting in a terminal voltage lower than that of other strings. To fix this: 1. Check if the number of PV modules connected in series is less than that of other PV strings. If so, wait until the PV string current drops below 0.5 A, turn off all DC switches, and adjust the number of PV modules in the PV string. 2. Check whether the open-circuit voltage of the PV string is abnormal. 3. Check whether the PV string is shaded.
How to troubleshoot 'Abnormal grounding' on Huawei Inverter?
If you're experiencing 'Abnormal grounding' with your Huawei Inverter, it could be due to: ? The neutral wire or PE cable of the inverter not being connected. ? The output mode set for the inverter being inconsistent with the cable connection mode. To resolve this, power off the inverter (turn off the AC output switch and DC input switch, and wait for a period of time). Then: ? Check whether the PE cable for the inverter is connected properly. ? If the inverter is connected to a TN power grid, check whether the neutral wire is properly connected and whether the voltage of the neutral wire to ground is normal. ? After powering the inverter back on, check whether the output mode set for the inverter is consistent with the output cable connection mode.
What does 'Grid overfrequency' mean on my Huawei SUN2000-40KTL-M3?
A 'Grid overfrequency' alarm on a Huawei Inverter indicates a power grid exception where the actual power grid frequency is higher than the requirements for the local power grid code. If the alarm occurs occasionally, it might be a temporary power grid issue, and the inverter should recover automatically. If the alarm persists, verify that the power grid frequency is within the acceptable range. If it's not, contact the local power operator. If the frequency is within range, consider modifying the grid overfrequency protection threshold via the app, SmartLogger, or NMS, with the consent of the local power operator.
What does 'Grid underfrequency' mean for Huawei SUN2000-40KTL-M3?
A 'Grid underfrequency' alarm on your Huawei Inverter indicates a power grid exception. The actual power grid frequency is lower than the requirements for the local power grid code. If the alarm occurs occasionally, the power grid may be temporarily abnormal. The inverter automatically recovers after detecting that the power grid becomes normal. If the alarm persists, check whether the power grid frequency is within the acceptable range. If not, contact the local power operator. If yes, modify the grid underfrequency protection threshold through the app, SmartLogger, or NMS with the consent of the local power operator.
General| Max. Efficiency | 98.7% |
|---|---|
| European Efficiency | 98.4% |
| Max. Input Voltage | 1100 V |
| MPPT Operating Voltage Range | 200 V - 1000 V |
| Max. Input Current per MPPT | 26 A |
| Number of MPPTs | 4 |
| Rated Output Power | 40000 W |
| Rated AC Voltage | 400 V |
| Rated AC Frequency | 50 Hz / 60 Hz |
| Adjustable Power Factor Range | 0.8 leading - 0.8 lagging |
| Total Harmonic Distortion (THD) | <3% |
| DC Reverse-Polarity Protection | Yes |
| AC Overcurrent Protection | Yes |
| DC Surge Protection | Type II |
| AC Surge Protection | Type II |
| Insulation Monitoring | Yes |
| Residual Current Monitoring | Yes |
| DC Switch | Yes |
| Protection Class | IP66 |
| Operating Temperature Range | -25°C to +60°C |
| Relative Humidity (Operating) | 0% - 100% |
| Cooling | Natural Convection |
| Max. Apparent AC Power | 44000 VA |
| AC Voltage Range | 320 V - 480 V |
| Operating Altitude | 4000 m |
| Display | LED Indicators |
| Communication | RS485, WLAN |
| Weight | 43 kg |
| Max. DC Power | 60000 W |
Details safety precautions related to personal protection during operations.
Guidelines for safe electrical connections and operations to prevent shocks.
Guidelines for selecting an appropriate installation location and environment.
Steps for physically mounting the inverter onto the installed bracket.
Essential safety precautions before making electrical connections.
Step-by-step guide for connecting the protective earth (PE) cable.
Precautions and steps for connecting the AC output power cable.
Safety precautions and procedures for connecting DC input power cables.
Checklist for essential checks before powering on the inverter.
Prerequisites and steps for powering on the inverter system.
Steps to safely power off the inverter system for maintenance.
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