Hoymiles DTU-Pro User manual

Version 1.3 (August 2020)

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Contents
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. Interface Layout .......................................................................................................................................................... 5
3.1 For DTU-Pro (GPRS Version) ............................................................................................................................ 5
3.2 For DTU-Pro (WiFi Version) ............................................................................................................................... 5
3.3 Zero Export Function (RS485 port) ................................................................................................................... 6
3.4 Remote active power control(RS485 port) ....................................................................................................... 7
3.5 DRM Port .............................................................................................................................................................. 7
3.6 Local Install Assistant .......................................................................................................................................... 8
4. DTU Installation .......................................................................................................................................................... 8
4.1 System Capacity .................................................................................................................................................. 8
4.2 Basic Conditions Required ................................................................................................................................. 8
4.3 Dimensions ........................................................................................................................................................... 9
4.4 System Installation Sequence .......................................................................................................................... 10
4.5 Preparation ......................................................................................................................................................... 10
4.6 Install the DTU .................................................................................................................................................... 11
5. Complete Installation Map ...................................................................................................................................... 14
6. Site Creation on HMP .............................................................................................................................................. 15
7. Customer Login ........................................................................................................................................................ 15
8. Browse the Web Station .......................................................................................................................................... 15
9. View Phone APP ...................................................................................................................................................... 16
10. LED Indicators ........................................................................................................................................................ 17
11. Technical Data ........................................................................................................................................................ 18

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1. Important Safety Information
1.1 Read this First
This manual includes important instructions for installing and maintaining the Hoymiles Data Transfer
Unit (DTU-Pro).
1.2 Safety Instructions
l Note that only professionals can install or replace DTU.
l 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.
l Please read all instructions and warnings on the technical specifications carefully.
l Do not use Hoymiles products in a way that is not suggested by manufacture. Doing so 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 or
distributor. If further support is required, please contact Hoymiles’ support at this link.
l www.hoymiles.com
l Hoymiles’ customer service center: [email protected]
Symbol Usage
Indicate a hazardous situation that can result in deadly electric shock hazards,
other serious physical injuries, or fire hazards.
Indicate directions that must be fully understood and followed entirely to
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 operations explained
before proceeding.

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1.5 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.
2. Hoymiles Microinverter System
2.1 Microinverter
It converts the DC output of PV modules into grid-compliant AC power. It sends the output
information of PV modules and the operation data of the microinverters to the DTU, which is the
hardware basis of the module-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 key 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 2.4GHz Proprietary RF (Nordic),
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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3. Interface Layout
3.1 For DTU-Pro (WIFI Version)
Item Description
A SD Card Slot
B DTU Power Indicator
C DTU Communication Indicator (With Server)
D DTU Communication Indicator (With MI)
E DTU Alarm Indicator
F WiFi Antenna (2.4G)
G RS485
H DRM Port (For Australia only)
I Ethernet Port
J USB Port
K Reset Bottom
L Power Port
M 2.4G Antenna
3.2 For DTU-Pro (GPRS Version)

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Item Description
A SIM Card Slot
B SD Card Slot
C DTU Power Indicator
D DTU Communication Indicator (With Server)
E DTU Communication Indicator (With MI)
F DTU Alarm Indicator
G GPRS Antenna (GSM)
H RS485
I DRM Port (For Australia only)
J Ethernet Port
K USB Port
L Reset Bottom
M Power Port
N 2.4G Antenna
3.3 Export Management Function (RS485 port)
a. Device Required.
l Hoymiles Microinverter: 4 in 1 Unit, 2 in 1 Unit and Single Unit
l DTU: DTU-Pro:
l Meter: Chint Meter (DDSU666)/Chint Meter (DTSU666)/CCS WattNode Meter
b. Export Control Type.
l Type 1: Zero Export: to limit the exporting power to zero so that can prevent the
generated power feed back to the grid.
l Type 2: Export Limit: to limit the exporting power within a certain value.
l Type 3: Production and Consumption Monitoring: enable to measure the PV generating under
a high accuracy.
c. Installation Diagram.

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Note: Please refer to “Hoymiles Export Management Technical Note” for more details.
3.4 Remote active power control (RS485 port)
In some countries, it might require that the generating plants should be equipped with a logic interface
(input port) in order to cease output active power or limit active power to a regulating level. This logic input
can be RS485 port, Ethernet port, etc. DTU-Pro provide RTU Modbus protocol over RS485 port for this
remote active power control. For more information, please refer to “Modbus implementation Technical
Note”.
3.5 DRM Port
DRM port is provided to support several demand response modes as below by connecting external control
device with a standard RJ-45 connector. For DTU-Pro, it can support DRM0/5/6/7/8 if used with Hoymiles
microinverters.
Mode Requirement
DRM0 Operate the disconnection device
DRM1 Do not consume power
DRM2 Do not consume at more than 50% of rated power
DRM3 Do not consume at more than 75% of rated power AND Source reactive power if capable
DRM4 Increase power consumption
(subject to constraints from other active DRMs)
DRM5 Do not generate power
DRM6 Do not generate at more than 50% of rated power
DRM7 Do not generate at more than 75% of rated power AND Sink reactive power if capable
DRM8 Increase power generation
(subject to constraints from other active DRMs)

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3.6 Local Install Assistant
Local Install Assistant is a new function integrated with DTU-Pro, please download the Installer App
(for installer/distributor use only) first.
DTU-Pro has improved from the previous generation of DTU product, and developed with this new
function that allows installer:
a. One step to complete the WiFi configuration;
b. Station overall Inverters status indication allows the installer to see how many MI under this DTU
is working properly (and the details for each MI) and how many is abnormal (and the details for each
MI) with one glance of eyes;
c. Add the Connection status, which will display the signal strength between each MI with
connected DTU, so that installer can adjust the DTU installation location accordingly. This function
will simplify the DTU installation, and avoid the second visit for installer due to the poor connection
between DTU and certain MI.
Note: Please refer to “Hoymiles Local Install Assistant Technical Note” for more details.
4. DTU Installation
4.1 System Capacity
The DTU-Pro is capable of monitoring up to 99 panels. If the communication between the DTU and
microinverter caused by the installation conditions, the number of PV modules that the DTU can
monitor may be reduced.
Note: Max. monitoring quantity is for open space, installation condition meets the requirement from
both DTU and Microinverter manual, and the distance between Microinverter and DTU needs to be
within the required range.
4.2 Basic Conditions Required
Before installing the DTU, ensure that the site meets the following requirements:
l Standard 220 VAC power outlet.

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l Stable broadband internet connection.
l Router with Ethernet port.
The environmental requirements for DTU installation:
l Away from dust, liquid, acidic, or corrosive gas.
l The temperature should be between -20ºC and 55ºC.
If you plan to install the DTU on the wall, please prepared two #8 (4.166mm diameter) screws and
a screwdriver in advance.
4.3 Dimensions
(Unit: mm)

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4.4 System Installation Sequence
4.5 Preparation
A. Download the Hoymiles mobile App
B. Check the box for following items:
- Hoymiles DTU-Pro
- Two Antennas
- Adapter
- Bracket
- 5 Pin Plug
C. Choose the way DTU-Pro connect to the Internet:
l For DTU-Pro (WiFi Version):
Use WiFi or Ethernet. Please prepare for the following items, if needed:
1. Install the PV modules and
microinverters and repeater
2. Locate the DTU
9. Wall-mount the DTU (optional)
4. Start procedure
5. Normal operation
7. Add Microinverter ID
6. Login the local interface of the DTU
8. Check the Communication
between Microinverters and DTU
3. Connect to the Internet