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Hoymiles HM-300NT User Manual

Microinverter
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Version 1.2 (June 2020)

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Summary of Contents for Hoymiles HM-300NT

  • Page 1 Version 1.2 (June 2020)
  • Page 2 About the Manual This manual contains important instructions for the HM-300NT/HM-350NT/HM-400NT Microinverter and must be read in its entirety before installing or commissioning the equipment. For safety, only qualified technician, who has received training or has demonstrated skills can install and maintain this Microinverter under the guide of this document.

  • Page 3: Table Of Contents

    6.3 On-site Inspection (For qualified installer only) ..................19 6.4 Routine Maintenance ..........................20 6.5 Replace Microinverter ..........................20 7. Decommissions ..............................21 7.1 Decommissions ............................21 7.2 Storage and Transportation ........................22 7.3 Disposal ..............................22 © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.
  • Page 4 Appendix 1: ................................27 Installation Map ..............................27 Appendix 2: ................................28 WIRING DIAGRAM –120VAC / 240VAC SPLIT PHASE: ................28 WIRING DIAGRAM – 120VAC / 208VAC THREE PHASE: ............... 29 © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 5: Important Notes

    2. About Safety 2.1 Important Safety Instructions The HM-300NT/HM-350NT/HM-400NT Microinverter is designed and tested according to iernational safety requirements. However, certain safety precautions must be taken when installing and operating this inverter. The installer must read and follow all instructions, cautions and warnings in this...

  • Page 6: Explanation Of Symbols

    Ø Do not use the equipment if any operating anomalies are found. Avoid temporary repairs. Ø 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.

  • Page 7: Radio Interference Statement

    4) Contact your dealer or an experienced radio/TV technician for help. 3. About Product 3.1 About Single Unit “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). © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 8: Highlights

    HM-300NT/HM-350NT/HM-400NT Hoymiles Single unit Microinverter HM-300NT/HM-350NT/HM-400NT 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. 3.2 Highlights Peak output power up to 300W/350W/400W; Adapted to 60 & 72 cells PV panels.

  • Page 9: About Function

    Description Item AC Bus Cable, 12/10 AWG Cable M8*25 screws DC Extension Cable, 1m AC Connector Unlock Tool Bus Connector Unlock Tool AC Sub Cap AC Bus End Cap, IP67 © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 10: Installation Precaution

    50cm above the roof. Otherwise, more DTUs may be required to ensure the communication quality between the DTUs and the microinverters. 5.4 Preparation Installation of the equipment is carried out based on the system design and the place in which the © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 11: Pre-Installation

    If this condition cannot be met, might trigger the inverter production de-rating. Fig.1 Installation position of microinverter 5.5 Pre-installation A) Plan the cable length to make the bus cable aligned with each PV module. B) Install the AC bus end cap: © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 12: Installation Steps

    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. *Note: Please install the microinverter at least 50cm above the ground/roof for better communication with Hoymiles DTU.
  • Page 13 Match the L, N and Ground line into the slot accordingly. Tighten the screws, and then tighten the cap back to the port. Plug the upper cover back to the bus connector. © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.
  • Page 14 A) Peel the removable serial number lable from each microinverter (The position of the label is shown as below). 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. © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 15: Troubleshooting

    Hoymiles technical support. 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. © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.
  • Page 16 DTU and microinverter. Then try Firmware error again. 3. If the fault still exists, contact your dealer or Hoymiles technical support. 1. If the alarm occurs accidentally and the microinverter can still work Software error code normally, no special treatment is required.
  • Page 17 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 18: Status Led Indicator

    2. If the alarm occurs frequently and cannot be recovered, contact your dealer or Hoymiles technical support. 6.2 Status LED Indicator The LED flashes five times at start up. All green flashes (1s gap) indicate normal start up. © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

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

    ü 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. 6.3 On-site Inspection (For qualified installer only) To troubleshoot an inoperable microinverter, follow the steps in the order shown.

  • Page 20: Routine Maintenance

    Remove the PV panel from the racking, and cover the panel. Ø Ø Using a meter to measure and make sure there is no current flowing in the DC wires between panel and microinverter. © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 21: Decommissions

    Please pack the Microinverter with the original packaging, or use the carton box that can afford 5kg weight and can be fully closed if the original packaging is no longer available. © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 22: Storage And Transportation

    HM-300NT/HM-350NT/HM-400NT 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 23: Dc Input

    Model HM-300NT HM-350NT HM-400NT Peak inverter efficiency 96.70% 96.70% 96.70% CEC weighted efficiency 96.50% 96.50% 96.50% Nominal MPPT efficiency 99.80% 99.80% 99.80% Night time power consumption (mW) <50 <50 <50 © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 24: Mechanical Data

    The HM-300NT/HM-350NT/HM-400NT Microinverter is a grid support interactive inverter, which is also known as a Grid Support Utility Interactive Inverter. And these microinverters also comply with California Rule 21. The Grid Support Support functions are controlled on Hoymiles Monitoring Platform and the DTU is required in this PV system.
  • Page 25 0.16 sec. 2 (LF2) Through SA11: Ramp Rate (RR) and Soft Start (SS) Adjustment Range Units Tolerance Ramp up %Irated/s +/- 4% rate Soft ramp up %Irated/s +/- 4% rate © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.
  • Page 26 Minimum slope of frequency droop %Prated/Hz SA15: Volt-Watt (VW) Units HM-300NT HM-350NT HM-400NT Output power rating Output Power accuracy %Prated Maximum Slope of active power reduction %Prated/Hz Minimum Slope of active power reduction %Prated/Hz © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 27: Installation Map

    HM-300NT/HM-350NT/HM-400NT Appendix 1: Installation Map © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 28: Wiring Diagram -120Vac / 240Vac Split Phase

    HM-300NT/HM-350NT/HM-400NT Appendix 2: WIRING DIAGRAM –120VAC / 240VAC SPLIT PHASE: © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

  • Page 29: Wiring Diagram - 120Vac / 208Vac Three Phase

    HM-300NT/HM-350NT/HM-400NT WIRING DIAGRAM – 120VAC / 208VAC THREE PHASE: © 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.

This manual is also suitable for:

Hm-350ntHm-400nt

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