Hoymiles MI-300N User Manual
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Hoymiles MI-300N User Manual

Microinverter
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Version 1.0 (June 2020)

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Summary of Contents for Hoymiles MI-300N

  • Page 1 Version 1.0 (June 2020)
  • Page 2 Other Information Product information is subject to change without notice. User manual will be updated frequently, please refer to Hoymiles official website at www.hoymiles.com for the latest version. © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 3: Table Of Contents

    6.3 Status LED Indicator (SN: 1022xxxxxxxx)....................21 6.4 Status LED Indicator (SN: 1020xxxxxxxx, 1021xxxxxxxx)...............22 6.5 On-site Inspection (For qualified installer only)..................22 6.6 Routine Maintenance............................23 6.7 Replace Microinverter.............................23 7. Decommissions..............................24 7.1 Decommissions............................... 24 7.2 Storage and Transportation...........................25 © 2019 Hoymiles Power Electronics Inc. All rights reserved.
  • Page 4 8.3 Efficiency, Safety and Protection........................26 8.4 Mechanical Data..............................27 8.5 Features................................27 Appendix 1:..................................28 Installation Map..............................28 Appendix 2:..................................29 WIRING DIAGRAM –120VAC / 240VAC SPLIT PHASE:................29 WIRING DIAGRAM – 120VAC / 208VAC THREE PHASE:................30 © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 5: Important Notes

    2. About Safety 2.1 Important Safety Instructions The MI-300N/MI-350N/MI-400N Microinverter is designed and tested according to international safety requirements. However, certain safety precautions must be taken when installing and © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 6: Explanation Of Symbols

    All repairs should be carried out using only qualified spare parts, which must be installed in  accordance with their intended use and by a licensed contractor or authorized Hoymiles service representative.  Liabilities arising from commercial components are delegated to their respective manufacturers.

  • Page 7: Radio Interference Statement

    2) Increase the separation between the microinverter and the receiving antenna. 3) Place the shield between the microinverter and the receiving antenna, such as metal / concrete roof. 4) Contact your dealer or an experienced radio/TV technician for help. © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 8: About Product

    “The world’s First Daisy-Chain Single Unit Microinverter” with extremely wide DC input operating voltage range (16-60V) and low start-up voltage (22V only). Hoymiles Single unit Microinverter MI-300N/MI-350N/MI-400N is the perfect selection for PV system with uneven number of panels with world’s NO.1 CEC weighted efficiency – 96.50% (peak efficiency 96.70%) in 2015.

  • Page 9: Dimension(Mm)

    The current condition is contradicted with Microinverter operating requirement. No house loads or the Export control value has been set as “0” on the DTU under the Zero Export Control mode. © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 10: About Installation

    Please install the Microinverter and all DC connections under the PV module to avoiding direct sunlight, rain exposure, snow layup, UV etc. Allow a minimum of 2 cm of space around the microinverter enclosure to ensure ventilation and heat dissipation. © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 11: Space Distance Required

    Referring to the Technical Data to make sure the environmental conditions fit the microinverter’s requirement (degree of protection, temperature, humidity, altitude, etc.) © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 12: Installation Steps

    B) Fix the screw on the rail. C) Hang the microinverter on the screw (shown as picture below), and tighten the screw. The silver cover side of the Microinverter should be facing the panel. © 2019 Hoymiles Power Electronics Inc. All rights reserved.
  • Page 13 B) Install the AC end cap on the open AC connector of the last microinverter in the AC branch circuit. Step 3. Connect AC End Cable Make the end cable 1. Take the AC port apart into 3 parts: © 2019 Hoymiles Power Electronics Inc. All rights reserved.
  • Page 14 Connect the AC end cable to the AC male connector from the first microinverter to complete the circuit. C) Connect the other side of the AC end cable to the distribution box, and wire it to the local grid network. © 2019 Hoymiles Power Electronics Inc. All rights reserved.
  • Page 15 Affix the serial number label to the respective location on the installation map. Step 5. Connect PV Modules Mount the PV modules above the microinverter. B) Connect the PV modules’ DC cables to the DC input side of the microinverter. © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 16: Troubleshooting

    6.3. If you use the microinverter of serial number “1020xxxxxxxx” and “1021xxxxxxxx”, please refer to chapter 6.2 and chapter 6.4. *Note: The microinverter of serial number “1062xxxxxxxx” can only work with the new Hoymiles gateway, DTU-Pro (SN: 10F7xxxxxxxx, 10F8xxxxxxxx), DTU-G100 (SN: 10D2xxxxxxxx) and DTU-W100 (SN: 10D3xxxxxxxx).
  • Page 17 MI-300N/MI-350N/MI-400N 1.Check if the grid configuration parameter is correct and upgrade again. Grid configuration 2. If the fault still exists, contact your dealer or Hoymiles technical parameter error support. 1. If the alarm occurs accidentally and the microinverter can still work Software error code normally, no special treatment is required.
  • Page 18 2. If the alarm occurs frequently, check whether the grid frequency change rate change rate is within the acceptable range. If no, 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. Power grid outage Please check whether there is a power grid outage.

  • Page 19: Troubleshooting List (Sn: 1020Xxxxxxxx, 1021Xxxxxxxx)

    Alarm Name Suggestion Code 1.Please make sure that the microinverter works normally. 2.Check the communication status between the DTU and hoymiles Offline monitoring system or between the DTU and the microinverter.If the communication is poor, try to make some improvements.
  • Page 20 2. If the alarms occur frequently on all the microinverters in your station, contact the local power operator to check whether there is a grid island. 3.If the alarm still exists, contact your dealer or Hoymiles technical © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 21: Status Led Indicator (Sn: 1022Xxxxxxxx)

    DTU and microinverter. Then try 5200 Firmware error again. 3. If the fault still exists, contact your dealer or Hoymiles technical support. Please check if the microinverter is turned off by the zero export mode, 8310 Shut down otherwise please contact your dealer.

  • Page 22: Status Led Indicator (Sn: 1020Xxxxxxxx, 1021Xxxxxxxx)

    Flashing Red and Green alternately: Firmware is corrupted.  *Note: All the faults are reported to the DTU, refer to the local APP of the DTU or Hoymiles Monitoring Platform for more information. 6.4 Status LED Indicator (SN: 1020xxxxxxxx, 1021xxxxxxxx) The LED flashes six times at start up.

  • Page 23: Routine Maintenance

    Avoid temporary repairs. All repairs should be carried out using only genuine spare parts. Each branch should provide a circuit breaker, but no need for central protection unit. 6.7 Replace Microinverter a. How to remove the Microinverter. De-energize the AC branch circuit breaker.  © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 24: Decommissions

    “Ok” to complete the station changes. 7. Decommissions 7.1 Decommissions Disconnect the inverter from DC input and AC output; remove all connection cable from the Microinverter; remove the Microinverter from the frame. © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 25: Storage And Transportation

    7.2 Storage and Transportation Hoymiles packages and protects individual components using suitable means to make the transport and subsequent handling easier. Transportation of the equipment, especially by road, must be carried out by suitable ways for protecting the components (in particular, the electronic components) from violent, shocks, humidity, vibration, etc.

  • Page 26: Dc Input

    Maximum input voltage (V) Maximum input current (A) 11.5 11.5 12.5 Maximum input short circuit current (A) of the microinverter. Refer to “Hoymiles Warranty Terms & Conditions” for more information. Model MI-300N MI-350N MI-400N Peak output power (W) Maximum continuous output power (W) 1.42@208V...

  • Page 27: Mechanical Data

    Confirms with NEC-2014 and NEC-2017 Article PV Rapid Shutdown 690.12 and CEC-2018 Sec 64-218 Rapid Shutdown of PV Systems *Note: Voltage and frequency ranges can be extended beyond nominal if required by the utility. © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 28: Installation Map

    MI-300N/MI-350N/MI-400N Appendix 1: Installation Map © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 29: Wiring Diagram -120Vac / 240Vac Split Phase

    MI-300N/MI-350N/MI-400N Appendix 2: WIRING DIAGRAM –120VAC / 240VAC SPLIT PHASE: © 2019 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 30: Wiring Diagram - 120Vac / 208Vac Three Phase

    MI-300N/MI-350N/MI-400N WIRING DIAGRAM – 120VAC / 208VAC THREE PHASE: © 2019 Hoymiles Power Electronics Inc. All rights reserved.
  • Page 31 MI-300N/MI-350N/MI-400N © 2019 Hoymiles Power Electronics Inc. All rights reserved.

This manual is also suitable for:

Mi-350nMi-400n

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