Huawei SUN2000-185KTL-INH0 - User Manual

Huawei SUN2000-185KTL-INH0

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SUN2000-(175KTL-H0, 185KTL-INH0, 185KTL-H1)

User Manual

Issue 19

Date 2023-12-20

HUAWEI TECHNOLOGIES CO., LTD.

Table of Contents

Other manuals for Huawei SUN2000-185KTL-INH0

Quick Guide28 pages

Questions and Answers

J
James ClarkeSep 9, 2025
What does String Current Backfeed mean on a Huawei SUN2000-185KTL-INH0 Inverter?
- S
  shannon31Sep 9, 2025
  String current backfeed in your Huawei Inverter can occur if only a few PV modules are connected in series in the PV string, causing the end voltage to be lower than that of other PV strings, or if the PV string is shaded. Check whether enough PV modules are connected in series to the inverter; if not, add more modules. Also, check whether the open-circuit voltage of the PV string is normal and whether the PV string is shaded.
J
Julie SparksSep 7, 2025
What causes Grid Voltage Imbalance on a Huawei Inverter?
- W
  whiteglennSep 7, 2025
  Grid voltage imbalance in your Huawei Inverter means the difference between grid phase voltages exceeds the upper threshold. Check that the grid voltage is within the normal range and that the AC output power cable is correctly connected.
T
Tracy BowmanAug 22, 2025
How to fix low insulation resistance on Huawei SUN2000-185KTL-INH0?
- R
  Richard BarberAug 22, 2025
  Low insulation resistance in your Huawei Inverter can occur if the PV string is short-circuited to the PE cable or has been in a moist environment for a long time, causing poor insulation to ground. To resolve this, check the impedance of the PV string to PE for short circuits and rectify them. Also, ensure the inverter's ground cable is correctly connected. If the impedance is less than the default value in a cloudy or rainy environment, try resetting the insulation resistance protection.
D
Daniel PorterSep 5, 2025
Why is the string power abnormal on my Huawei SUN2000-185KTL-INH0?
- J
  Joanna HuffmanSep 5, 2025
  Abnormal string power in your Huawei Inverter can be due to the PV string being shaded from sunlight for a long time or the PV string aging abnormally. Check if the current of the abnormal PV string is lower than that of other PV strings. If it is, check whether the abnormal PV string is shaded and if the actual number of PV strings is the same as the configured number. If the abnormal PV string is clean and not shaded, check whether the PV string is damaged.
E
Ellen HarmonSep 4, 2025
What does Grid Underfrequency mean on a Huawei SUN2000-185KTL-INH0?
- W
  William GreenSep 4, 2025
  Grid underfrequency on your Huawei Inverter indicates a power grid exception where the actual power grid frequency is lower than the standard requirement for the local power grid. If the alarm occurs occasionally, the power grid may be temporarily abnormal, and the inverter will automatically recover once the grid returns to normal. If the alarm occurs frequently, check whether the power grid frequency is within the acceptable range and contact the local power operator if it isn't. If the frequency is within range, modify the power grid underfrequency protection threshold with the local power operator's consent.
M
Melissa GarciaSep 2, 2025
What causes Cabinet Overtemperature on a Huawei SUN2000-185KTL-INH0?
- R
  Robert GarciaSep 3, 2025
  Cabinet overtemperature in your Huawei Inverter can occur due to poor ventilation, high ambient temperature, or the inverter not working properly. Check the ventilation and whether the ambient temperature exceeds the upper limit. If ventilation is poor or the ambient temperature is too high, improve ventilation.
E
Elizabeth DavenportSep 1, 2025
Why does my Huawei SUN2000-185KTL-INH0 show Grid Overfrequency?
- M
  Mary MartinSep 1, 2025
  Grid overfrequency on your Huawei Inverter indicates a power grid exception where the actual power grid frequency is higher than the standard requirement for the local power grid. If the alarm occurs occasionally, the power grid may be temporarily abnormal, and the inverter will automatically recover once the grid returns to normal. If the alarm occurs frequently, check whether the power grid frequency is within the acceptable range and contact the local power operator if it isn't. If the frequency is within range, modify the power grid overfrequency protection threshold with the local power operator's consent.
J
John MartinAug 31, 2025
What to do if Huawei Inverter displays String Reverse Connection error?
- C
  Cheryl PerkinsAug 31, 2025
  A string reverse connection error on your Huawei Inverter means the PV string is connected in reverse. Check whether the PV string is reversely connected to the inverter. If it is, wait until the solar irradiance declines at night and the PV string current drops to below 0.5 A. Then, turn off the three DC switches and correct the PV string connection.
T
Teresa SmithAug 30, 2025
Why am I getting an Output Overcurrent error on my Huawei SUN2000-185KTL-INH0?
- E
  Elizabeth EscobarAug 30, 2025
  Output overcurrent in your Huawei Inverter happens when the power grid voltage drops dramatically or the power grid is short-circuited, causing the inverter's transient output current to exceed the upper threshold and triggering inverter protection. The inverter detects its external working conditions in real time and will automatically recover after the fault is rectified. If the alarm occurs frequently and affects the energy yield of the power plant, check whether the output is short-circuited.
B
Brian LongAug 28, 2025
What does Grid Undervoltage mean on a Huawei Inverter?
- M
  Mr. Daniel MaynardAug 28, 2025
  Grid undervoltage on your Huawei Inverter happens when the grid voltage falls below the lower threshold, or the undervoltage duration exceeds the time that triggers LVRT. If the alarm occurs occasionally, the power grid may be temporarily abnormal, and the inverter will automatically recover when the grid returns to normal. If it occurs frequently, check if the power grid voltage is within the acceptable range and contact the local power operator if it isn't. If the voltage is within range, modify the power grid undervoltage protection thresholds with the local power operator's consent. Also, check the AC circuit breaker and AC output power cable if the fault persists.

Huawei SUN2000-185KTL-INH0 Specifications

General

Model	SUN2000-185KTL-INH0
Type	String Inverter
Rated Output Power	185 kW
Max. DC Voltage	1100 V
Max. Input Voltage	1100 V
Start-up Voltage	200 V
Max. Input Current per MPPT	26 A
Rated AC Power	185 kW
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%
MPPT Efficiency	99.9%
DC Connection	MC4
Protection Class	IP66
Operating Temperature Range	-25 °C to +60 °C
Max. Input Power	253 kW
Display	LED Indicator
Communication	RS485, Ethernet

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