hoymiles HM-300T Micro Inverter User Manual

hoymiles HM-300T Micro Inverter

Product Information

Specifications

• Version: 1.2 (June 2020)
• Model: HM-300T/HM-350T/HM-400T/HM-300A/HM-350A/HM-400A

About the Manual

This manual contains important instructions for the HM-300T/HM-350T/HM-400T Microinverter and must be read in its entirety before installing or commissioning the equipment. For safety, only qualified technicians who have received training or have demonstrated skills can install and maintain this Microinverter under the guidance of this document.

Other Information

Product information is subject to change without notice. The user manual will be updated frequently, please refer to Hoymiles official website at www.hoymiles.com for the latest version.

About Function

The function of the HM-300T/HM-350T/HM-400T Microinverter is described in this section.

Work Mode

The work mode of the Microinverter is explained in detail.

Appendix 1: Installation Map

This section provides an installation map for the Microinverter.

Important Notes

Product Range

This manual describes the assembly, installation, commissioning, maintenance, and failure search of the following models of Hoymiles Microinverters:

• HM-300T/HM-300A (300W)
• HM-350T/HM-350A (350W)
• HM-400T/HM-400A (400W)

Target Group

This manual is intended for qualified technicians who have been trained or have demonstrated skills to install and maintain this Microinverter under the guidance of this document for safety purposes.

Symbols Used

The safety symbols used in this user manual are explained below:

Indicates a hazardous situation that can result in deadly
electric shock hazards, other serious physical injury, or fire
hazards.|
Indicates directions which must be fully understood and
followed in entirety in order to avoid potential safety hazards,
including equipment damage or personal injury.|
Indicates that the described operation must not be carried out.
The reader should stop, use caution, and fully understand the
operations explained before proceeding.|

About Safety

Important Safety Instructions

The HM-300T/HM-350T/HM-400T/HM-300A/HM-350A/HM-400A Microinverter is designed and tested according to international 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 installation manual.

Explanation of Symbols

The symbols used in this manual are explained below:

Treatment To comply with European Directive 2002/96/EC on waste
Electrical and Electronic Equipment and its implementation as
national law, electrical equipment that has reached the end of its
life must be collected separately and returned to an approved
recycling facility. Any device no longer required must|

FAQ

• Q: Where can I find the latest version of the user manual?
• A : The latest version of the user manual can be found on the Hoymiles official website at www.hoymiles.com.

About Microinverter

This system is composed of a group of Microinverters that convert direct current (DC) into alternating current (AC) and feed it into the public grid. The system is designed for the incorporation of one Microinverter for two photovoltaic modules. Each Microinverter works independently which guarantees the maximum power generation of each photovoltaic module. This setup enables user to control the production of a single photovoltaic module directly, consequently improving the flexibility and reliability of the system.
About the Manual

This manual contains important instructions for the HM-300T/HM-350T/HM-400T Microinverter and must be read in its entirety before installing or commissioning the equipment. For safety, only a qualified technician, who has received training or has demonstrated skills can install and maintain this Microinverter under the guide of this document.

Other Information
Product information is subject to change without notice. A user manual will be updated frequently, please refer to Hoymiles official website at www.hoymiles.com for the latest version.

 Important Notes

Product Range

This manual describes the assembly, installation, commissioning, maintenance and failure search of the following model of Hoymiles Microinverter:

• l HM-300T/HM-300A
• l HM-350T/HM-350A
• l HM-400T/HM-400A

Note: “300” means 300W, “350” means 350W, “400” means 400W.

Target Group
This manual is only for qualified technicians, who have been trained or have demonstrated skills can install and maintain this Microinverter under the guide of this document for safety purposes.
Symbols Used
The safety symbols in this user manual are shown below.

Indicates a hazardous situation that can result in deadly electric shock hazards, other serious physical injury, or fire hazards.

| Indicates directions that must be fully understood and followed in entirety in order to avoid potential safety hazards including equipment damage or personal injury.
| Indicates this points out that the described operation must not be carried out. The reader should stop, use caution and fully understand the operations explained before proceeding.

About Safety

Important Safety Instructions

The HM-300T/HM-350T/HM-400T/HM-300A/HM-350A/HM-400A Microinverter is designed and tested according to international 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 installation manual.

All operations including transport, installation, start-up and maintenance, must be carried out by qualified, trained personnel.

• Before installation, check the unit to ensure free of any transport or handling damage, which could affect insulation integrity or safety clearances. Choose the installation location carefully and adhere to specified cooling requirements. Unauthorized removal of necessary protections, improper use, incorrect installation and operation may lead to serious safety and shock hazards or equipment damage.
• Before connecting the Microinverter to the power distribution grid, contact the local power distribution grid company to get appropriate approvals. This connection must be made only by qualified technical personnel. It is the responsibility of the installer to provide external disconnect switches and
• Over Current Protection Devices (OCPD).
• Only one photo voltaic module can be connected to one input of the inverter. Do not connect batteries or other sources of power supply. The inverter can be used only if all the technical characteristics are observed and applied.
• Do not install the equipment in adverse environment conditions such as flammable, explosive, corrosive, extremely high or low temperature, and humid. Do not use the equipment when the safety devices do not work or are disabled.
• Use personal protective equipment, including gloves and eye protection during the installation.
• Inform the manufacturer about non-standard installation conditions.
• Do not use the equipment if any operating anomalies are found. Avoid temporary repairs.
• 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.
• Anytime the inverter has been disconnected from the public network, please be extremely cautious as some components can retain a charge sufficient to create a shock hazard. Prior to touching any part of the inverter please ensure surfaces and equipment are under touch safe temperatures and voltage potentials before proceeding.
• Hoymiles accepts No liability for damage from incorrect or improper operation.
• Electrical Installation & Maintenance shall be conducted by a licensed electrician and shall comply with Local Wiring Rules.

Explanation of Symbols

To comply with European Directive 2002/96/EC on waste Electrical and Electronic Equipment and its implementation as national law, electrical equipment that has reached the end of its life must be collected separately and returned to an approved recycling facility. Any device no longer required must

| be returned to an authorized dealer or approved collection and recycling facility.
---|---
| Caution

Do not come within 8 inches (20cm) of the microinverter for any length of time while it is in operation.

| ****

The danger of high voltages

Danger to life due to high voltage in the microinverter.

| Beware of hot surface

The inverter can become hot during operation. Avoid contact with metal surfaces during operation.

**| CE mark**

The inverter complies with the requirements of the Low Voltage Directive for the European Union.

**| Read manual first**

Please read the installation manual first before installation, operation and maintenance.

Radio Interference Statement

This microinverter has been tested and found to comply with the limits for CE EMC, which can provide reasonable protection against harmful energy. However, if not installed according to the instructions, the microinverter may cause harmful interference to radio equipment. There is no guarantee that the interference will not occur in a particular installation. To confirm that the radio or television reception is interfered by this equipment, you can turn the equipment off and on. If this equipment does cause harmful interference to the radio or television equipment, please try to correct the interference by one or more of the following measures:

1. Relocate the receiving antenna.
2. Increase the separation between the microinverter and the receiving antenna.
3. Place the 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.

About Product

About Single Unit

“The World’s First Daisy-Chain Single Unit Microinverter” with an extremely wide DC input operating voltage range (16-60V) and low start-up voltage (22V only). Hoymiles Single unit Microinverter HM-300T/HM-350T/HM-400T/HM-300A/HM- 350A/HM-400A is the perfect selection for the PV system with the uneven number of panels with the world’s NO.1 CEC weighted efficiency – 96.50% (peak efficiency 96.70%) in 2015.

Highlights

Maximum output power up to 300W/350W/400W; Adapted to 60 & 72 cells PV panels.

• Peak efficiency 96.70%; CEC weighted efficiency 96.50%.
• Static MPPT efficiency 99.80%; Dynamic MPPT efficiency 99.76% in overcast weather.
• Power factor (adjustable) 0.8 leading……0.8 lagging.
• External antenna for stronger communication with DTU.
• High reliability: NEMA6 (IP67) enclosure; 6000V surge protection.

Terminals Introduction

Dimension(mm)

About Function

Work Mode
Normal: Under this mode, the Microinverter operates normally and converts DC power into AC power to support the house loads and feed into Public Grid. Zero Export Control: Under this mode Microinverter’s generation is limited based on the current house loads, there will be no extra power fed into the Public Grid. Stand by: There are several circumstances that the Microinverter will stay in Standby mode:

• The current condition is contradicted with the 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

About Installation

Accessories

Note: All accessories above are not included in the package, and need to be purchased separately. Please contact our sales representative for the price. (M8 screws need to be prepared by installer-self.)

Installation Precaution

Please install the Microinverter and all DC connections under the PV module to avoid 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.

Note : For some countries, the DTU will be required to meet the local grid regulation (e.g. G98/99 for the UK etc.)

Space Distance Required

If the microinverters are installed on a concrete roof or steel roof, the communication with the DTU may be slightly affected. Under such installation conditions, it is better for the microinverters to be installed 50cm above the roof. Otherwise, more DTUs may be required to ensure the communication quality between the DTUs and the microinverters.

Preparation

Installation of the equipment is carried out based on the system design and the place in which the equipment is installed.

• The installation must be carried out with the equipment disconnected from the grid (power disconnect switch open) and with the photovoltaic modules shaded or isolated.
• Referring to the Technical Data to make sure the environmental conditions fit the microinverter’s requirement (degree of protection, temperature, humidity, altitude, etc.)
• To avoid power de-rating due to an increase in the microinverter internal temperature, do not expose it to direct sunlight.
• To avoid overheating, always make sure the airflow around the inverter is not blocked. Do not install in places where gasses or flammable substances may be present.
• Avoid electromagnetic interference that can compromise the correct operation of electronic equipment.

When choosing the position of installation, comply with the following conditions:

• Install only on structures specifically conceived for photovoltaic modules (supplied by installation technicians).
• Install a Microinverter underneath the photovoltaic modules to make sure it works in the shadows. If this condition cannot be met, might trigger the inverter production de-rating

Fig.1 Installation position of microinverter

Pre-installation

• Plan the cable length to make the bus cable aligned with each PV module.
• Install the AC bus end cap:

Uses the bus connector unlock tool to unlock the port upper cover;

• Loose the three screws with the screwdriver. Untighten the cap as circled below, and remove the extra cable
• Screw the cap back to port, and plug in the AC bus end cap
• Plug the upper cover back into the bus connector.

Installation Steps
Step 1. Fix the Microinverter on the Rail

• Mark the approximate centre of each panel on the frame.
• Fix the screw on the rail.
• Hang the microinverter on the screw (shown in picture below), and tighten the screw. The silver cover the side of the microinverter should be facing the panel

Step 2. Complete the AC Connection

• Attach the AC Bus Cable with the mounting rail, and fix the cable by tie wraps.
• Push the AC connector of the microinverter to the trunk cable connector until you hear “click
• If there is any vacant bus port, please plug the AC sub cap on the vacant plug to ensure waterproof and dustproof
• Note: Under the circumstance that need to remove the inverter AC cable from the bus port, please use the AC connector unlock tool and insert the tool into the side of AC port to remove.

Step 3. Install AC End Cable

• Prepare the AC end cable with the proper length, and insert one side of the cable into the cap. 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 into the bus connector
• Connect the other side of the AC End Cable to the distribution box, and wire it to the local grid network

Step 4. Create an Installation Map

• Peel the removable serial number label 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 (Please refer to the appendix for the installation map).

Step 5. Connect PV Modules

• Mount the PV modules above the microinverter.
• Connect the PV modules’ DC cables to the DC input side of the microinverter

Step 6. Energize the System

• Turn on the AC breaker of the branch circuit.
• Turn on the main AC breaker of the house. Your system will start to generate power after about a two-minute wait time

Step 7. Set Up the Monitoring System

Refer to the DTU User Manual or DTU Quick Install Guide, and Quick Installation Guide for HMP Online Registration to install the DTU and set up your monitoring system. Product information is subject to change without notice. (Please download reference manuals at www.hoymiles.com.)

Troubleshooting

Troubleshooting List

Alarm

Code

| Alarm Name| Suggestion
---|---|---

121

| ****

Over temperature protection

| 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.

125

| Grid configuration parameter error| 1. Check if the grid configuration parameter is correct and upgrade again.

2.   If the fault still exists, contact your dealer or Hoymiles technical support.

126

| ****

Software error code 126

| 1.  If the alarm occurs accidentally and the microinverter can still work normally, no special treatment is required.

2.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

---|---|---

127

| ****

Firmware error

| 1. Check if the firmware is correct and upgrade again.

2. Check the communication between DTU and Hoymiles monitoring system, and the communication between DTU and microinverter. Then try again.

3.   If the fault still exists, contact your dealer or Hoymiles technical

support.

128

| ****

Software error code 128

| 1.  If the alarm occurs accidentally and the microinverter can still work normally, no special treatment is required.

2.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

129

| ****

Software error code 129

| 1.  If the alarm occurs accidentally and the microinverter can still work normally, no special treatment is required.

2.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

130

| ****

Offline

| 1. Please make sure that the microinverter works normally.

2. Check the communication status between the DTU and the Hoymiles monitoring system or between the DTU and the microinverter. If the communication is poor, try to make some improvements.

3.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

141

| ****

Grid overvoltage

| 1.  If the alarm occurs accidentally, the grid voltage may be abnormal temporarily. The microinverter can recover automatically after grid voltage becomes normal.

2. If the alarm occurs frequently, check whether the grid voltage is within the acceptable range. If no, contact the local power operator or change the grid overvoltage protection limit via the Hoymiles monitoring system with

the consent of the local power operator.

142

| ****

10 min value grid overvoltage

| 1.  If the alarm occurs accidentally, the grid voltage may be abnormal temporarily. The microinverter can recover automatically after grid voltage becomes normal.

2. If the alarm occurs frequently, check whether the grid voltage is within the acceptable range. If no, contact the local power operator or change the grid overvoltage protection limit via the Hoymiles monitoring system with

the consent of the local power operator.

143

| ****

Grid Undervoltage

| 1.  If the alarm occurs accidentally, the grid voltage may be abnormal temporarily. The microinverter can recover automatically after the grid voltage becomes normal.

2. If the alarm occurs frequently, check whether the grid voltage is within

the acceptable range. If no, contact the local power operator or change the grid Undervoltage protection limit via the Hoymiles monitoring system

| | with the consent of the local power operator.

3. If the fault still exists, check the AC switch or AC wiring.

---|---|---

144

| ****

Grid over frequency

| 1.  If the alarm occurs accidentally, the grid frequency may be abnormal temporarily. The microinverter can recover automatically after grid frequency becomes normal.

2.  If the alarm occurs frequently, check whether the grid frequency is within the acceptable range. If no, contact the local power operator or change the grid over frequency protection limit via Hoymiles monitoring

system with the consent of the local power operator.

145

| ****

Grid under frequency

| 1.  If the alarm occurs accidentally, the grid frequency may be abnormal temporarily. The microinverter can recover automatically after the grid frequency becomes normal.

2.  If the alarm occurs frequently, check whether the grid frequency is within the acceptable range. If no, contact the local power operator or change the grid under the frequency protection limit via Hoymiles monitoring

system with the consent of the local power operator.

146

| ****

Rapid grid frequency change rate

| 1.  If the alarm occurs accidentally, the grid frequency may be abnormal temporarily. The microinverter can recover automatically after the grid frequency becomes normal.

2.  If the alarm occurs frequently, check whether the grid frequency change rate is within the acceptable range. If no, contact the local power operator or change the grid frequency change rate limit via the Hoymiles

monitoring system with the consent of the local power operator.

147| Power grid outage| Please check whether there is a power grid outage.
148| Grid disconnection| Please check whether the AC switch or AC wiring is normal.

149

| ****

Island detected

| 1.  If the alarm occurs accidentally, the grid voltage may be abnormal temporarily. The microinverter can recover automatically after the grid voltage becomes normal.

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

support.

205

| Input port overvoltage| 1. Please make sure that the PV module open-circuit voltage is less than or equal to the maximum input voltage.

2.   If the PV module open-circuit voltage is within the normal range,

contact your dealer or Hoymiles technical support.

207

| ****

Input port undervoltage

| 1. Please make sure that the PV module open-circuit voltage is less than or equal to the maximum input voltage.

2.   If the PV module open-circuit voltage is within the normal range,

contact your dealer or Hoymiles technical support.

209

| ****

Port No input

| 1. Please confirm whether this port is connected to the PV module;

2. If the PV module is connected, please check the DC cable connection between this port and the PV module.

301

| ****

Hardware Error Code 301

| 1.  If the alarm occurs accidentally and the microinverter can still work normally, no special treatment is required.

2.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

---|---|---

302

| ****

Hardware Error Code 302

| 1.  If the alarm occurs accidentally and the microinverter can still work normally, no special treatment is required.

2.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

303

| ****

Hardware Error Code 303

| 1.  If the alarm occurs accidentally and the microinverter can still work normally, no special treatment is required.

2.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

304

| ****

Hardware Error Code 304

| 1.  If the alarm occurs accidentally and the microinverter can still work normally, no special treatment is required.

2.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

305

| ****

Hardware Error Code 305

| 1.  If the alarm occurs accidentally and the microinverter can still work normally, no special treatment is required.

2.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

306

| ****

Hardware Error Code 306

| 1.  If the alarm occurs accidentally and the microinverter can still work normally, no special treatment is required.

2.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

307

| ****

Hardware Error Code 307

| 1.  If the alarm occurs accidentally and the microinverter can still work normally, no special treatment is required.

2.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

308

| ****

Hardware Error Code 308

| 1.  If the alarm occurs accidentally and the microinverter can still work normally, no special treatment is required.

2.  If the alarm occurs frequently and cannot be recovered, contact your

dealer or Hoymiles technical support.

Status LED Indicator

The LED flashes five times at start-up. All green flashes (1s gap) indicate normal start up

Start-up Process

• Flashing green five times (0.3s gap): Start-up success
• Flashing Red five times (0.3s gap): Start-up failure

Run Process

• Flashing Fast Green (1s gap): Producing power.
• Flashing Slow Green (2s gap): Producing power but one input is abnormal.
• Flashing Slow Green (4s gap): Producing power but there is no communication with DTU.
• Flashing Red (1s gap): Not producing power AC grid invalid (Voltage or frequency out of range).
• Flashing Red (0.5s gap): There is a fault except for the abnormality of the grid.

Other Status

• 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.

On-site Inspection (For qualified installers only)

To troubleshoot an inoperable microinverter, follow the steps in the order shown.

1. Verify the utility voltage and frequency are within ranges shown in the appendix Technical Data of this microinverter.
2. Check the connection to the utility grid. Verify utility power is present at the inverter in question by removing AC, then DC power. Never disconnect the DC wires while the microinverter is producing power. Re-connect the DC module connectors and watch for five short LED flashes.
3. Check the AC branch circuit interconnection between all the microinverters. Verify each inverter is energized by the utility grid as described in the previous step.
4. Make sure that any AC breakers are functioning properly and are closed.
5. Check the DC connections between the microinverter and the PV module.
6. Verify the PV module DC voltage is within the allowable range shown in the appendix Technical Data of this manual.
7. If the problem persists, please call Hoymiles customer support

Warning

• Do not try to repair the microinverter. If the troubleshooting fails, please return it to the factory for replacement.

Routine Maintenance

1. Only authorized personnel are allowed to carry out the maintenance operations and are responsible to report any anomalies.
2. Always use the personal protective equipment provided by the employer when carry out the maintenance operation.
3. During normal operation, check that the environmental and logistic conditions are correct. Make sure that the conditions have not changed over time and that the equipment is not exposed to adverse weather conditions and has not been covered with foreign bodies.
4. DO NOT use the equipment if any problems are found, and restore the normal conditions after the fault is removed.
5. Conduct an annual inspection on various components, and clean the equipment with a vacuum cleaner or special brushes

• Do not attempt to dismantle the Microinverter or make any internal repairs! To preserve the integrity of safety and insulation, the Microinverters are not designed to allow internal repairs!
• The AC output wiring harness (AC drop cable on the Microinverter) cannot be replaced. If the cord is damaged the equipment should be scrapped.
• Maintenance operations must be carried out with the equipment disconnected from the grid (power switch open) and the photovoltaic modules obscured or isolated unless otherwise indicated.
• For cleaning, do not use rags made of filamentary material or corrosive products that may corrode parts of the equipment or generate electrostatic charges.
• Avoid temporary repairs. All repairs should be carried out using only genuine spare parts.
• If all the microinverters connect to the DTU-Pro, the DTU can limit the output power imbalance of all the microinverters between phases to below 3.68kW if required. Please refer to “Hoymiles Technical Note Limit Phase Balance” for more details.
• Each branch should provide a circuit breaker, but no need for a central protection unit.

Replace Microinverter

How to remove the Microinverter

• De-energize the AC branch circuit breaker.
• Remove the PV panel from the racking, and cover the panel.
• Use a meter to measure and make sure there is no current flowing in the DC wires between the panel and the microinverter.
• Use the DC disconnect tool to remove the DC connectors.
• Use the AC disconnect tool to remove the AC connectors.
• Un-screw the fixing screw on the top of the microinverter and remove the microinverter from the PV racking

How to replace the Microinverter

• Please record the new Microinverter’s SN.
• Please make sure the AC branch circuit breaker if off, and follow the Microinverter installation steps to install the replacement unit.
• Go to the monitoring platform (if a customer already registered this station online), please access the
  • Device List” page and find the device that you just replaced. Please click the down arrow next to the
  • More” on the right side of the page, and select “Replace”. Input the new Microinverter’s SN and click
  • Ok” to complete the station changes

Decommissions

Decommissions

Disconnect the inverter from the DC input and AC output; remove all connection cables from the Microinverter; remove the Microinverter from the frame. 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.

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 violence, shocks, humidity, vibration, etc. Please dispose of the packaging elements in appropriate ways to avoid unforeseen injury. It is the customer’s responsibility to examine the condition of the components transported. Onc receiving the Microinverter, it is necessary to check the container for any external damage and verify receipt of all items. Call the delivering carrier immediately if damage or shortage is detected. If inspection reveals damage to the inverter, contact the supplier, or authorized distributor for a repair/return determination and instructions regarding the process. The microinverter storage temperature is -40-85℃.

Disposal

• If the equipment is not used immediately or is stored for long periods, check that it is correctly packed. The equipment must be stored in well-ventilated indoor areas that do not have characteristics that might damage the components of the equipment.
• Take a complete inspection when restarting after a long time or prolonged stop.
• Please dispose the equipment properly after scrapping, which is potentially harmful to the environment, under the regulations in force in the country of installation

Compliance Consideration

Earth Fault Alarm Notification

This inverter complies with IEC 62109-2 clause 13.9 for earth fault alarm monitoring. If an Earth Fault Alarm occurs, the LED on the microinverter will light up solid red every 0.5 seconds. An external indication of an earth fault alarm can be provided by connecting the PV System to the Hoymiles monitoring app/portal. For details of how to configure monitoring please refer to documents “HMP Operating Guide (Webpage) V2.0” and “HMP Operation Guide (APP)”.

Power Quality Response Modes

This inverter supports the following power quality response modes as per AS 4777.2:2015: Power derating for voltage variation (Volt-Watt mode). The inverter output power varies in response to the voltage at its terminal. This mode can be enabled via gridprofile module on the Hoymiles monitoring platform. Please refer to documents “HMP Operating Guide (Webpage) V2.0” and “HMP Operation Guide (APP)” or contact Tech Support for more information

DRM

DRM is provided to support several demand response modes by giving control signals as below.

This microinverter can support DRM0/5/6/7/8 by being installed with DTU-Pro. The DRM interface is on the Hoymiles gateway DTU-Pro as follows.

Technical Data

Warning

Be sure to verify the following before installing the Hoymiles Microinverter System. Verify that the voltage and current specifications of the PV module must match those of the microinverter. The maximum open circuit voltage rating of the PV module must within the operating voltage range of the microinverter. The maximum current rating at MPP is recommended to be equal to or less than the maximum input DC current. But the maximum short circuit current must be equal to or less than the maximum input
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 “Hoymiles Warranty Terms & Conditions” for more information.

DC Input

Model| HM-300T/HM- 300A| HM-350T/HM- 350A| HM- 400T/HM- 400A
---|---|---|---
Commonly used module power (W)| Up to 380

(single panel)

| Up to 440

(singe panel)

| Up to 500

(singe panel)

Peak power MPPT voltage range (V)| 29~48| 33~48| 34~48
Start-up voltage (V)| 22| 22| 22
Operating voltage range (V)| 16~60| 16~60| 16~60
Maximum input voltage (V)| 60| 60| 60
Maximum input current (A)| 11.5| 11.5| 12.5
Maximum input short circuit current (A)| 15| 15| 15

AC Output

Model| HM-300T/HM- 300A| HM-350T/HM- 350A| HM- 400T/HM- 400A
---|---|---|---
Rated output apparent power (VA)| 300| 350| 400
Rated output current (A)| 1.36@230V

1.25@240V

| 1.59@230V

1.46@240V

| 1.82@230V

1.67@240V

Nominal output voltage/range (V)| 230/180-275

240/180-275

| 230/180-275

240/180-275

| 230/180-275

240/180-275

Nominal frequency/range (Hz)| 45-55
Power factor| >0.99 default

0.8 leading……0.8 lagging

Output current harmonic distortion| <3%| <3%| <3%
Maximum units per branch| 16@230V

16@240V

| 14@230V

14@240V

| 12@230V

12@240V

Efficiency, Safety and Protection

Model| HM-300T/HM- 300A| HM-350T/HM- 350A| HM- 400T/HM- 400A
---|---|---|---
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

Mechanical Data

Model| HM-300T/HM- 300A| HM-350T/HM- 350A| HM- 400T/HM- 400A
---|---|---|---
Ambient temperature range (℃)| -40 ~ +65| -40 ~ +65| -40 ~ +65
Storage temperature range (℃)| -40 ~ +85| -40 ~ +85| -40 ~ +85
Dimensions (W×H×D mm)| 182×164×29.5| 182×164×29.5| 182×164×29.5
Weight (kg)| 1.75| 1.75| 1.75
Enclosure rating| Outdoor-NEMA (IP67)
Cooling| Natural convection – No fans
Altitude| <2000m

Features

Model| HM-300T/HM- 300A| HM-350T/HM- 350A| HM- 400T/HM- 400A
---|---|---|---
Communication| 2.4GHz Proprietary RF(Nordic)
Monitoring| Hoymiles Monitoring System

(Hoymiles DTU is required)

Warranty| 12 years standard, 25 years optional

Compliance

| VDE-AR-N 4105:2018, EN50549-1:2019, VFR2019,

AS 4777.2:2015, IEC/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.

Appendix 1

Installation Map

Appendix 2:
WIRING DIAGRAM – 230VAC SINGLE PHASE

WIRING DIAGRAM – 230VAC / 400VAC THREE PHASE:

Documents / Resources

| hoymiles HM-300T Micro Inverter [pdf] User Manual
HM-300T, HM-350T, HM-400T, HM-300A, HM-350A, HM-400A, HM-300T Micro Inverter, Micro Inverter, Inverter
---|---

References

• Open Energy For All - Hoymiles
• Manual-Hub.com – Free PDF manuals!

Read User Manual Online (PDF format)

Download This Manual (PDF format)

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