Hoymiles MI-300T User Manual
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Hoymiles MI-300T User Manual

Single-phase microinverter
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Open Energy for All
Single-phase Microinverter
USER MANUAL
MI-300T
MI-350T
MI-400T
Region: North America V202105
hoymiles.com

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Summary of Contents for Hoymiles MI-300T

  • Page 1 Open Energy for All Single-phase Microinverter USER MANUAL MI-300T MI-350T MI-400T Region: North America V202105 hoymiles.com...
  • Page 2 PV module, consequently improving the flexibility and reliability of the system. About the Manual This manual contains important instructions for the MI-300T/MI-350T/MI-400T Microinverter and must be read in its entirety before installing or commissioning the equipment. For safety purposes, only a qualified technician who has received training or has demonstrated competence may install and maintain this microinverter under the guidance of this document.

  • Page 3: Table Of Contents

    6.6 Microinverter Replacement 7. Decommissioning 7.1 Decommissioning 7.2 Storage and Transportation 7.3 Disposal 8. Technical Data 8.1 DC Input 8.2 AC Output 8.3 Efficiency, Safety and Protection 8.4 Mechanical Data 8.5 Features © 2021 Hoymiles Power Electronics Inc. All rights reserved.
  • Page 4 WIRING DIAGRAM – 230 VAC SINGLE-PHASE: WIRING DIAGRAM – 230 VAC / 400 VAC THREE-PHASE: WIRING DIAGRAM – 120 VAC / 240 VAC SPLIT-PHASE: WIRING DIAGRAM – 120 VAC / 208 VAC THREE-PHASE: © 2021 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 5: Important Notes

    Indicates that the described operation must not be carried out. The reader should stop, use with caution and fully understand the operations explained before proceeding. © 2021 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 6: About Safety

    Do not use the equipment if any anomalies are discovered while operating. Avoid temporary repairs. • All repairs should be carried out by 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. •...

  • Page 7: Explanation Of Symbols

    2) Increase the separation between the microinverter and the receiving antenna. 3) Place a shield between the microinverter and the receiving antenna, such as a metal / concrete roof. 4) Contact your dealer or an experienced radio/TV technician for help. © 2021 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 8: About Product

    “Daisy-Chain Single Unit Microinverter” with wide DC input operating voltage range (16 V–60 V) and low start-up voltage (22 V only). The Hoymiles Single Unit Microinverter MI-300T/MI-350T/MI-400T is a reliable solution for PV systems with an uneven number of panels, and offers high CEC weighted efficiency – 96.50% (peak efficiency 96.70%) in 2015.

  • Page 9: About Function

    • The current condition contradicts with the microinverter operating requirements. • No household loads or the export control value has been set as “0” on the DTU in the Zero Export Control mode. © 2021 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 10: About Installation

    UV, etc. Allow a minimum of 2 cm of space around the microinverter enclosure to ensure ventilation and heat dissipation. *Note: For some countries, the DTU will be required to meet local grid regulations (e.g. G98/99 for UK). © 2021 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 11: Required Space Distance

    PV modules to make sure that it operates in a shaded or shadowed environment. If this condition cannot be met, it may trigger the microinverter production de- rating. Fig.1 Microinverter installation position © 2021 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 12: Pre-Installation

    C) If there is any vacant bus port, please insert the AC sub cap in the vacant plug to ensure waterproofing and dustproofing. © 2021 Hoymiles Power Electronics Inc. All rights reserved.
  • Page 13 Step 5. Connect PV Modules A) Mount the PV modules above the microinverter. B) Connect the PV modules’ DC cables to the DC input side of the microinverter. © 2021 Hoymiles Power Electronics Inc. All rights reserved.
  • Page 14 Refer to the DTU User Manual or DTU Quick Installation Guide, and Quick Installation Guide for S-Miles Cloud (Hoymiles Monitoring Platform) Online Registration to install the DTU and set up the monitoring system. Product information is subject to change without notice. (Download reference manuals at www.hoymiles.

  • Page 15: Troubleshooting

    Single-phase Microinverter User Manual 6. Troubleshooting The 3rd generation of this microinverter (SN:1022xxxxxxxx) can only work with the new Hoymiles DTU (DTU-Pro, DTU-Lite and DTU-W100/DTU-G100) with the following serial number. Model Serial Number 10F7xxxxxxxx DTU-Pro 10F8xxxxxxxx 10FAxxxxxxxx DTU-G100 10D2xxxxxxxx DTU-W100...
  • Page 16 2. If the alarms occur frequently on all the microinverters in your Island detected 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 Service Center. © 2021 Hoymiles Power Electronics Inc. All rights reserved.
  • Page 17 1. If the alarm occurs accidentally and the microinverter can still function normally, no special treatment is required. Hardware error code 308 2. If the alarm occurs frequently and cannot be restored, contact your dealer or Hoymiles Technical Service Center. © 2021 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 18: Status Led Indicator

    (3) Other Status • Alternating red and green flashing: Firmware is corrupted. *Note: All faults are reported to the DTU, refer to the local DTU app or S-Miles Cloud (Hoymiles Monitoring Platform) for more information. Insulation Resistance Detection There is a resistance sensor in the microinverter to measure the resistance between the outputs of PV module and the ground.

  • Page 19: On-Site Inspection (For Qualified Installer Only)

    Avoid temporary repairs. All repairs should be carried out by using only genuine spare parts. If all microinverters connect to the DTU-Pro, the DTU can limit the output power imbalance of all microinverters between phases to below 3.68 kW if required. Please refer to the “Hoymiles Technical Note Limit Phase Balance” for more details.

  • Page 20: Microinverter Replacement

    “Devices” page to find the device that you just replaced. Click the “Device Maintenance” button to jump to the new page and select “Replace Device”. Enter the new microinverter’s SN and click the “OK” button to complete the replacement. © 2021 Hoymiles Power Electronics Inc. All rights reserved.

  • Page 21: Decommissioning

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

  • Page 22: Technical Data

    DC short-circuit current. The output DC power of the PV module is NOT recommended to exceed 1.35 times the output AC power of the microinverter. Refer to the “Hoymiles Warranty Terms & Conditions” for more information.

  • Page 23: Efficiency, Safety And Protection

    IEC 61727, IEC 62116, IEC 61683, VFR2019, VDE V 0126-1-1, IEC/ Compliance EN 62109-1/-2, IEC/EN 61000-3-2/-3, IEC/EN-61000-6-1/-2/-3/-4 *Note: Voltage and frequency ranges can be extended beyond nominal if required by the utility. © 2021 Hoymiles Power Electronics Inc. All rights reserved.
  • Page 24 Single-phase Microinverter User Manual Appendix 1: Installation Map To sheet ____ To sheet ____ © 2021 Hoymiles Power Electronics Inc. All rights reserved.
  • Page 25 AC BRANCH CABLE AC BRANCH CABLE BROWN - L BROWN - L BLUE - N BLUE - N UP TO 12 HM-400Ts PER UP TO 12 HM-400Ts PER YELLOW & GREEN - G YELLOW&GREEN - G AC BRANCH CIRCUIT AC BRANCH CIRCUIT GROUND GROUND PHASE-L1...
  • Page 26 UP TO 12 HM-400Ts PER UP TO 12 HM-400Ts PER AC BRANCH CABLE AC BRANCH CABLE AC BRANCH CIRCUIT AC BRANCH CIRCUIT BROWN - L BROWN - L BLUE - N BLUE - N YELLOW & GREEN - G YELLOW&GREEN - G PHASE-L1 PHASE-L1 AC DISTRIBUTION PANEL...
  • Page 27 AC BRANCH CABLE AC BRANCH CABLE BROWN - L BROWN - L UP TO 12 HM-400Ts PER BLUE - N UP TO 12 HM-400Ts PER BLUE - N AC BRANCH CIRCUIT AC BRANCH CIRCUIT YELLOW & GREEN - G YELLOW&GREEN - G GROUND GROUND PHASE-L1 &...
  • Page 28 UP TO 12 HM-400Ts PER UP TO 12 HM-400Ts PER AC BRANCH CABLE AC BRANCH CIRCUIT AC BRANCH CABLE AC BRANCH CIRCUIT BROWN - L BROWN - L BLUE - N BLUE - N YELLOW & GREEN - G YELLOW&GREEN - G PHASE-L1&L2 PHASE-L1 &...

This manual is also suitable for:

Mi-350tMi-400tMi-300Mi-350Mi-400

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