Hoymiles DTU-Lite-S User manual

Open Energy for All
Data Transfer Unit
USER MANUAL
DTU-Lite-S
Region: Global V202202 hoymiles.com

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 01
Data Transfer Unit User Manual
CONTENTS
1. Important Safety Information 02
1.1 Read This First 02
1.2 Safety Instructions 02
1.3 User 02
1.4 Support and Contact Information 02
1.5 Other Information 02
2. Hoymiles Microinverter System 03
2.1 Microinverter 03
2.2 DTU 03
2.3 S-Miles Cloud 03
3. Interface Layout 04
4. Installation Planning and Preparation 04
4.1 Pre-installation 04
4.1.1 System Capacity 04
4.1.2 Environmental Requirements for DTU Installation: 04
4.2 Dimensions 04
4.3 System Installation Steps 05
5. DTU Installation 06
5.1 Installation Instructions 06
5.2 Online Setting 06
5.3 Complete Installation Map 09
6. Micro Toolkit 09
6.1 Connect to the DTU 09
6.2 Field Commissioning and Data Viewing 11
6.2.1 Data Overview 11
6.2.2 Add Microinverter 11
6.2.3 View Microinverter Data 14
6.2.4 View Communication Status with Microinverter 15
7. Site Creation on S-Miles Cloud 17
7.1 Site Creation 17
7.2 Customer Login 23
7.3 Browse Station on Webpage 24
7.4 View Phone App 24
8. DTU Replacement 25
9. LED Indicators 26
10. Technical Data 27

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 02
Data Transfer Unit User Manual
1. Important Safety Information
1.1 Read This First
This manual includes important instructions for installing and maintaining the Hoymiles Data Transfer Unit
(DTU-Lite-S).
DTU-Lite-S is only compatible with Hoymiles new HMS and HMT series of microinverters.
1.2 Safety Instructions
Symbol Usage
This indicates a hazardous situation that can result in deadly electric shocks,
serious physical injuries, and fire incidents.
This indicates that directions must be strictly followed to avoid safety hazards
such as equipment damage and personal injury.
This indicates that the act is forbidden. You should stop, use caution and fully
understand the operations explained before proceeding.
• Note that only professionals can install or replace DTU.
• Do not try to repair DTU without Hoymiles’ permission. If the DTU is damaged, please send it back to
your installer for repair/replacement. Disassembling DTU without Hoymiles’ permission will invalidate
the remaining warranty period.
• Please read all the instructions and warnings in the technical specications carefully.
• Do not use Hoymiles products in a way that is not suggested by the manufacturer. Otherwise it can
cause death, personal injuries, or equipment damage.
1.3 User
This manual is only for professional installation and maintenance personnel.
1.4 Support and Contact Information
If you have technical queries concerning our products, please contact your installer or distributor. If further
technical support is required, please contact our support team at [e-mail].
For other questions please contact [e-mail]
1.5 Other Information
Product information is subject to change without notice. The user manual will be updated regularly. Please
refer to Hoymiles official website at www.hoymiles.com for the latest version.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 03
Data Transfer Unit User Manual
2. Hoymiles Microinverter System
The complete Hoymiles PV microinverter system is composed of PV microinverter, Hoymiles gateway DTU
and Hoymiles S-Miles Cloud.
The microinverter converts direct current to alternating current and sends each module’s power generation
and operation data to the DTU.
DTU can communicate with multiple microinverters, collect their operation data, and send them to S-Miles
Cloud.
On S-Miles Cloud, you can check the real-time data of each PV module and perform remote operation and
maintenance.
2.1 Microinverter
Microinverters convert the DC output of PV modules into grid-compliant AC power. They send their
operation data and the output information of PV modules 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 among the first class in the industry worldwide.
2.2 DTU
DTU is the key component in Hoymiles microinverter system. It works as the communication gateway
between the Hoymiles microinverters and S-Miles Cloud. The DTU communicates with the microinverter in
a wireless way and collects the operation data of the system. Meanwhile, the DTU connects to the Internet
using different communication options such as Ethernet, Wi-Fi or 4G and communicates with S-Miles Cloud.
The operation data of the microinverter system will be uploaded to S-Miles Cloud via DTU.
2.3 S-Miles Cloud
It collects the operation data and status of the microinverters in the system and provides module-level
monitoring for the users and maintenance staff. The following diagram shows the Hoymiles Microinverter
system.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 04
Data Transfer Unit User Manual
3. Interface Layout
3.1 For Wi-Fi Version
4. Installation Planning and Preparation
4.1 Pre-installation
4.1.1 System Capacity
The DTU-Lite-S is capable of monitoring up to 99 PV modules. If the communication between the
DTU and microinverter is affected by the installation conditions, the number of PV modules that the
DTU can monitor may be reduced.
Note: The maximum number of modules is only possible in open space when installation conditions detailed in DTU
and microinverter manuals are fulfilled and the microinverter and DTU are properly placed apart as required.
4.1.2 Environmental Requirements for DTU Installation:
• The DTU should be installed away from dust, liquid, acidic, or corrosive gas.
• The ambient temperature should be between -20ºC and 55ºC.
4.2 Dimensions
A B C
Item Description
A USB Connector
B Status Indicator
C Reset Button
12.5 mm 33.0 mm
143.0 mm

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 05
Data Transfer Unit User Manual
4.3 System Installation Steps
Steps 1 to 6 need to be nished on site while steps 7 to 9 can be done either on site or at home. Step 6 must be done
correctly in order to complete site creation on S-Miles Cloud.
1. Install the PV modules and
microinverters
2. Locate the DTU
3. Connect the microinverter
to the grid
4. Power on DTU
5. Connect DTU with Internet
6.Use Micro Toolkit for onsite
inspection (optional). Check
the communication between
microinverters and DTU
7. Site creation
9. View data on S-Miles Cloud
8. Add microinverter ID

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 06
Data Transfer Unit User Manual
5. DTU Installation
5.1 Installation Instructions
A) Check the box for the following items:
9Hoymiles DTU-Lite-S
9Adapter
B) Power the DTU-Lite-S
Option 1: Connect the DTU to the
adapter and plug it into a wall socket.
Option 2: Connect the DTU to the
adapter and plug it into the power socket.
Note:
1. Please make sure that it is placed at least 0.5 meters above the ground, and try to install the DTU perpendicular
to the ground.
2. To prevent signal attenuation, please do not install the DTU directly above metal or concrete.
5.2 Online Setting
A) Plug in the power adapter to power the DTU, once the DTU powers on, the red, green and blue lights
will flash for one second in turn for 30 seconds.
B) Download the Hoymiles mobile
installer App
C) Use the App to connect to the DTU
9Open the Installer App on smart phone/tablet and log in. Click “O&M” at the bottom of the page and
then click “Network Cong”.
Option 1 Option 2

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 07
Data Transfer Unit User Manual
9Select the DTU’s wireless network and click Connect. (The network name of the DTU consists of DTUL
and product serial number, and is password-free by default.)
D) Set up with Internet
9When the connection is successful, click “Network Cong” again and enter the Network Cong page.
DTUL-65200352

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 08
Data Transfer Unit User Manual
9Select the router Wi-Fi and enter the password.
9Click “Send to DTU”.
9The network conguration takes about 1 minute, please be patient.
9If the network is not connected, please check the internet as instructed.
9Check the indicator light of DTU when the connection is successful (green light shall remain on).
Note: If your conguration page is inconsistent with the above, please update the DTU rmware to the
latest version.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 09
Data Transfer Unit User Manual
5.3 Complete Installation Map
Please complete the installation map.
6. Micro Toolkit
Micro Toolkit is one of the toolkits that come with the S-Miles Cloud app. It can be used for on-site
inspection after the PV power station is complete, so that the operation of microinverter can be monitored
without Site Creation.
6.1 Connect to the DTU
9Open the Installer app on smart phone/tablet and log in.
9Click “O&M” on the bottom of the page and then “Micro Toolkit”.
A) Peel the serial number label from the
DTU and affix it to the installation map.
B) Complete system information of the
installation map as shown on the right.
Tosheet ______

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 10
Data Transfer Unit User Manual
9Select the DTU’s wireless network and click “Connect”. (The network name of the DTU consists of DTUL
and product serial number, and is password-free by default.)
DTUL-65200352

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 11
Data Transfer Unit User Manual
6.2 Field Commissioning and Data Viewing
6. 2.1 Data Overview
1. Click O&M and enter Micro Toolkit.
2. If you have already created the power station on the monitoring platform, you can directly view
the data and information on the overview page. (Refer to Section 6.2.3 for more details)
6.2.2 Add Microinverter
If power station is not yet created on the platform, you need to type in microinverter SN to view
power station data as instructed below.
1. Click “Power generation” button

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 12
Data Transfer Unit User Manual
2. Press the “Add Device” button to add the microinverter to the list. (The microinverter added here
is only used for on-site debugging, and it will not be uploaded to the server, nor can it replace the
power station creation on S-Miles Cloud.)
3. You can click “Automatic Search” to add microinverter, or you can type in / scan the microinverter
ID.
116573326525
116573326525

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 13
Data Transfer Unit User Manual
4. The search result of microinverters and microinverters added will be displayed in the list. Tap the
button on the right if you want to delete it.
5. Confirm that the microinverter ID in the list is correct, and tap Save.
116573326525
116573326526
116573326525
116573326526

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 14
Data Transfer Unit User Manual
6.2.3 View Microinverter Data
1. Click “Power Generation” and you can see the list of microinverter and PV power of each
microinverter.
2. If you want to see more details of one microinverter, just click the serial number, then you can
check the input and output data on the page shown as below.
Note: If the microinverter signal is so weak that the real-time data are not updated, move the DTU
closer to the microinverter.
116573326525
116573326525
116573326526
116573326527
116573326528
116573326529
116573326530

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 15
Data Transfer Unit User Manual
6.2.4 View Communication Status with Microinverter
1. Re-enter Micro Toolkit and tap “Connection Status”.
2. On this page, you can check the signal strength between the DTU and each microinverter. Tap the
signal icon to enter the respective microinverter page (signal quality is constantly refreshed).

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 16
Data Transfer Unit User Manual
3. You can also tap the button to switch the signal quality and real-time data page.
Note: If the microinverter has no signal, please check whether the microinverter is powered on or
refer to the microinverter user manual for troubleshooting.
116573326525

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 17
Data Transfer Unit User Manual
7. Site Creation on S-Miles Cloud
This is a brief description of how to create a new site. You can refer to “Quick Installation Guide for S-Miles
Cloud Online Registration” for detailed account creation instructions.
7.1 Site Creation
1. Search “Hoymiles” in the App Store (IOS) or the Play Store (Android), or scan the QR code to download the
Hoymiles Installer app.
2. Open the app and log in with your installer account and password. If you are a new installer with Hoymiles,
please apply for an Installer account from your distributor in advance.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 18
Data Transfer Unit User Manual
3. Select the “Station” tab on the bottom, and then select “⊕” on the right top side of the page to add station.
Fill in the station details and press “Next”. Select one from the three types of plant: Home Plant, Enterprise
Plant, and Large Professional Plant.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 19
Data Transfer Unit User Manual
4. Select owner for the plant. Create a new one if there is none.