Hoymiles MI-1000T User Manual

Hoymiles MI-1000T

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Version 1.0 (June 2020)

Table of Contents

Questions and Answers:

C
Christopher GarciaSep 1, 2025
What does it mean when my Hoymiles MI-1000T Inverter says 'Island detected'?
- K
  kristinmartinezSep 1, 2025
  If the Hoymiles Inverter displays an 'Island detected' alarm, it could be due to a temporary grid voltage issue, in which case the microinverter should recover automatically once the grid voltage stabilizes. If the alarms occur frequently on all microinverters in your station, contact your local power operator to check for a grid island. If the alarm persists, contact your dealer or Hoymiles technical support.
M
Mr. Antonio Estrada Jr.Aug 31, 2025
How to troubleshoot over temperature protection on my Hoymiles MI-1000T Inverter?
- M
  Maria HarrisonAug 31, 2025
  To address the over temperature protection issue with your Hoymiles Inverter, you should: 1. Check the ventilation and ambient temperature at the microinverter installation position. 2. If the ventilation is poor or the ambient temperature exceeds the limit, improve the ventilation and heat dissipation. 3. If both the ventilation and ambient temperature meet the requirements, contact your dealer or Hoymiles technical support.
N
ngalvanAug 29, 2025
What should I do if my Hoymiles MI-1000T is showing a grid underfrequency alarm?
- A
  amccarthyAug 29, 2025
  If the Hoymiles inverter alarm for grid underfrequency occurs accidentally, the grid frequency may be abnormal temporarily and the microinverter can recover automatically after grid frequency becomes normal. If the alarm occurs frequently, check whether the grid frequency is within the acceptable range.
T
Tanner RichardsonAug 28, 2025
What does it mean when my Hoymiles Inverter shows a 'Rapid grid frequency change rate' alarm?
- S
  Stephanie TranAug 28, 2025
  If the Hoymiles inverter alarm for rapid grid frequency change rate occurs accidentally, the grid frequency may be abnormal temporarily and the microinverter can recover automatically after grid frequency becomes normal. If the alarm occurs frequently, check whether the grid frequency change rate is within the acceptable range. If not, contact the local power operator or change the grid frequency change rate limit via Hoymiles monitoring system with the consent of the local power operator.
D
Daniel MitchellAug 27, 2025
What should I do if my Hoymiles MI-1000T displays a grid overfrequency alarm?
- M
  Michael BanksAug 27, 2025
  If the Hoymiles inverter alarm for grid overfrequency occurs accidentally, it may be a temporary issue. The microinverter should recover automatically when the grid frequency returns to normal. If the alarm occurs frequently, check if the grid frequency is within the acceptable range. If it is not, contact your local power operator or, with their consent, change the grid overfrequency protection limit via the Hoymiles monitoring system.
A
Andrea NguyenAug 27, 2025
What should I do if my Hoymiles MI-1000T shows a grid undervoltage error?
- J
  John PowellAug 27, 2025
  If the Hoymiles inverter alarm for grid undervoltage occurs accidentally, it might be a temporary issue, and the microinverter should automatically recover once the grid voltage returns to normal. If the alarm appears frequently, verify that the grid voltage is within the acceptable range. If not, contact the local power operator or change the grid undervoltage protection limit via Hoymiles monitoring system with the consent of the local power operator. If the fault still exists, check the AC switch or AC wiring.
Z
Zachary MooreAug 25, 2025
What should I do if my Hoymiles MI-1000T Inverter displays a '10 min value grid overvoltage' error?
- N
  Nancy GibsonAug 26, 2025
  If the Hoymiles inverter alarm for 10 min value grid overvoltage occurs accidentally, it might be a temporary issue, and the microinverter should automatically recover once the grid voltage returns to normal. If the alarm appears frequently, verify that the grid voltage is within the acceptable range. If it's not, you may need to contact your local power operator or, with their consent, adjust the grid overvoltage protection limit through the Hoymiles monitoring system.
C
Christopher WhiteAug 23, 2025
How do I fix a firmware error on my Hoymiles MI-1000T Inverter?
- K
  Kimberly CohenAug 23, 2025
  If the Hoymiles Inverter shows a firmware error, check if the firmware is correct and upgrade again. Also, check the communication between the DTU and the Hoymiles monitoring system, as well as the communication between the DTU and the microinverter. If the fault persists, contact your dealer or Hoymiles technical support.
C
Carolyn AdamsSep 12, 2025
What does Hardware Error Code 301 mean on my Hoymiles Inverter?

Hoymiles MI-1000T Specifications

General

Brand	Hoymiles
Model	MI-1000T
Category	Inverter
Language	English

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