Hoymiles DTU-MI-GPRS User manual

Version D-4-1.0 @2019

© 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved. 2
DTU-MI-GPRS
Content
1. Important Safety Information................................................................................................................................ 3
1.1 Read this First.................................................................................................................................................. 3
1.2 Safety Instructions........................................................................................................................................... 3
1.3 User................................................................................................................................................................... 3
1.4 Support and Contact Information.................................................................................................................. 3
1.5 Other Information............................................................................................................................................. 4
2. Hoymiles Microinverter System........................................................................................................................... 4
2.1 Microinverter .................................................................................................................................................... 4
2.2 DTU................................................................................................................................................................... 4
2.3 Hoymiles Monitoring Server........................................................................................................................... 4
3. Introduction to DTU Interface............................................................................................................................... 5
3.1 DTU Screens.................................................................................................................................................... 5
3.2 DTU Local Interface........................................................................................................................................ 5
3.3 DTU Home Interface....................................................................................................................................... 6
3.4 DTU View Interface......................................................................................................................................... 6
3.5 Configuration Interface................................................................................................................................... 8
3.6 Device ID Interface.......................................................................................................................................... 8
4. DTU Installation.................................................................................................................................................... 10
4.1 System Capacity............................................................................................................................................ 10
4.2 Basic Conditions Required........................................................................................................................... 10
4.3 Dimensions..................................................................................................................................................... 11
4.4 System Installation Sequence..................................................................................................................... 11
4.5 Install the DTU............................................................................................................................................... 12
5. Complete Installation Map.................................................................................................................................. 16
6. Site creation on HMP.......................................................................................................................................... 16
7. Customer Login.................................................................................................................................................... 17
8. Browse the Web Station..................................................................................................................................... 17
9. View Phone APP.................................................................................................................................................. 18
10. Troubleshooting................................................................................................................................................. 18
11. Datasheet ........................................................................................................................................................... 19

© 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved. 3
DTU-MI-GPRS
1. Important Safety Information
1.1 Read this First
This manual includes important instructions for installing and maintaining the Hoymiles Data
Transfer Unit (DTU-MI-GPRS).
1.2 Safety Instructions
Note that only professionals can install or replace DTU.
Do not try to repair DTU without Hoymiles’ approval. If DTU is damaged, please send the DTU
back to your installer for repairing/replacing. Disassembling DTU without Hoymiles’ approval will
invalidate remaining of the warranty period.
Please read all instructions and warnings on the technical specifications carefully.
Do not use Hoymiles products in a way that is not suggested by manufacture. If doing so, it
may cause death or injury to persons or damage to equipment.
1.3 User
This manual is only for professional installation and maintenance personnel to use.
1.4 Support and Contact Information
If you have technical queries concerning our products, please contact your system’s installer.
If further support is required, please contact Hoymiles’ support at this link.
www.hoymiles.com
Hoymiles’ customer service center: servi[email protected]
Symbol
Usage
Indicate a hazardous situation that can result in deadly electric shock hazards,
other physical severe injuries, or fire hazards.
Indicate directions that must be fullyunderstood and followed in entiretyto avoid
potential safety hazards, including equipment damage or personal injury.
Indicate that the described operation must not be carried out. The reader should
stop, use caution, and fully understand the processes explained before
proceeding.

© 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved. 4
DTU-MI-GPRS
1.5 Other Information
Product information is subject to change without notice. The user manual will be updated
frequently, and please refer to Hoymiles official website at www.hoymiles.com for the latest
version.
2. Hoymiles Microinverter System
2.1 Microinverter
It converts the DC output of solar modules into grid-compliant AC power. It sends the output
information of PV panels and the operation data of the microinverters to the DTU, which is the
hardware basis of the panel-level monitoring.
With conversion efficiency up to 96.7% and MPPT efficiency up to 99.9%, Hoymiles
microinverters rank into the first class of the world’s Microinverter industry.
2.2 DTU
The DTU is the critical component in Hoymiles microinverter system. It works as the
communication gateway, which operates between the Hoymiles microinverters and the
Hoymiles Monitoring Server. The DTU communicates with the microinverter wirelessly via 2.4G
RF, collecting the operation data of the system. Meanwhile, the DTU connects to the Internet
via router and communicates with Hoymiles Monitoring Server. The microinverter system
operation data will be uploaded to Hoymiles Monitoring Server via DTU.
2.3 Hoymiles Monitoring Server
It collects the operation data and status of the microinverters in the system and provides the
module-level monitoring for the users and maintenance staff.
The following diagram shows the Hoymiles Microinverter system.

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DTU-MI-GPRS
3. Introduction to DTU Interface
3.1 DTU Screens
When the DTU completes the start-up process and obtains the IP address, the DTU will start
to operate. During operating, the LCD displays the primary system operation status and
indicates two different pages of info alternately shown below (screens 1 and 2 will appear once
internet configuration completed).
The data indicates:
Page 1:
(1) Web connection information: “YC” means that the DTU connects to the Internet. If it is
“NC”, the DTU does not connect to the Internet.
(2) Time, e.g. 10:27:55.
(3) --XXXX indicates the ID of the current search.
(4) Local IP address, e.g.192.168.1. XXX.
Page 2:
(5) It indicates data on the real-time output power in kilowatts, e.g., 0.16kW.
(6) It indicates data on today’s output energy of the system in kWh, e.g., 0.07kWh.
(7) The total number of microinverters in this system, e.g., ALL: 05.
(8) The number of microinverters usually communicating with DTU, e.g., LINK: 01.
(9) _XXXX, the first two indicate CSQ (IoT card connect Internet signal strength), the last
two indicate Internet transfer status.
3.2 DTU Local Interface
The DTU-MI has an embedded web server, which enables you to view the operation data,
status, and manage the devices and clear fault via browser locally. A computer will be needed
to connect to the same network with DTU, then open the DTU local interface in the browser by
entering the IP address shown on the LCD screen.

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DTU-MI-GPRS
3.3 DTU Home Interface
The home interface will be shown as the picture below once input the IP address into the
browser address bar. In the home interface, the left side displays the basic information of the
system, including Total Output Power, Total Energy, Today Energy, and CO2 Saved. On the
right side shows the operation data of each microinverter, including PV Voltage, Grid Voltage,
Grid Frequency, Grid Power, Today Energy, and Internal Temperature. On the upper side of
the page, it displays the total number of microinverters, connected microinverters, and
unconnected microinverters.
3.4 DTU View Interface
There are three options under “View” bottom: DTU Information; System Inventory; RF
Information.

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DTU-MI-GPRS
(1) DTU Information: access to the DTU primary information interface, which contains the
following information:
a. DTU Information, including software version, hardware id code, manufacturing date, and
default data uploading time (900s). The uploading time intervals can change according to the
requirements within the range between 300-900s
b. Network Information is mainly contented with the configuration information related to the
network port, includes static IP and dynamic IP settings. “Enable DHCP” will need to be ticked
if you choose to use the router connection.
Note: The System channel can be amended on the “Configure System” under the “Configure”
function on the top functional bar. The setting range is 0~25. If there is more than one DTU in
the same installation area, please set different channel numbers for different DTU.
c. Client Set item include：
Server address: data4.hoymiles.com, Factory settings
Server IP: 1.1.0.0, Factory settings
Dest Port: 10017, Factory settings
Online mode selection: please select the GPRS/ROUTER box when using the GPRS. If not,
please un-select the GPRS/ROUTER box.
(2) System Inventory: indicate system microinverter software and hardware version,
microinverter ID, and installation time and status.
(3) RF Information: indicates the basic information of the DTU communication module,
including software and hardware versions of the DTU module in the system, as well as the
module ID and status.

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DTU-MI-GPRS
3.5 Configuration Interface
(1) Ground Fault Reset
Click the “GFDI Fault” under the “Configuration” to open the ground fault manage interface. If
there is a ground fault, it will list on this page (as the picture shows below). It can be cleared
by clicking the “Clear Fault” bottom. If the problem persists, please contact Hoymiles technical
support team.
(2) Date/Time Setting
Click the “Date/Time” from the “Configuration” to open the times setting interface. You can
enter your local date/time in the corresponding box and click the “Send” to save.
3.6 Device ID Interface
During the initial installation or further system maintenance, it might require to add or delete
the microinverters’ IDs to maintain the system performance.

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DTU-MI-GPRS
(1) Manual Config
Click the “Manual Config” under “Device ID” to open a manual ID manage interface.
You need to add the repeater IDs firstly and then add microinverter’s ID into the blank box
shown below manually, and then click “Add ID.”
After inputting all of the microinverters’ IDs and repeater’s ID, please click the “Reg ID” to finish
registration. All details system operating information will be listed on the Home interface.

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DTU-MI-GPRS
In case there is any defected microinverter need to be replaced, please “Delete” the related
microinverter ID.
(2) Auto Scan
Click the “Device ID” under the “Auto Scan” to open the auto-ID management interface.
Click “Scan ID” to start an auto search for nearby microinverters. When the DTU detects all the
microinverters’ IDs, please click “Reg ID” to finish registration. If the DTU cannot identify all the
microinverters in the system over 30 minutes, please use “Manual Config” to input those
missing IDs.
4. DTU Installation
4.1 System Capacity
The DTU is capable of monitoring up to 499 MI-250/MI-300/MI-350 microinverters or 249 MI-
500/MI-600/MI-700 microinverters or 124 MI-1000/M-1200/MI-1500.
Note: Max. Monitoring quantity is for open space installation condition, and the distance
between Microinverter and DTU need to be within the required range.
4.2 Basic Conditions Required
Before installing the DTU, ensure that the site meets the following requirements:
Standard 220 VAC power outlet.
Stable broadband internet connection.
Router with an Ethernet port or SIM card.
The environmental requirements for DTU installation:
Away from dust, liquid, acidic, or corrosive gas.
The temperature should be between -20ºC and 55ºC.
If you plan to install the DTU on the wall, two #8 (4.166mm diameter) screws and a screwdriver
shall be prepared in advance.