Hoymiles DTU-WLite User manual

Open Energy for All
Single-phase Microinverter
USER MANUAL
DTU-WLite
Region: Europe V202204 hoymiles.com

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 01
Single-phase Microinverter 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. About Hoymiles Microinverter System 03
2.1 The Microinverter 03
2.2 The DTU 03
2.3 The S-Miles Cloud (Hoymiles Monitoring Platform) 03
3. DTU Installation 03
3.1 System Capacity 03
3.2 Basic Conditions Required 03
3.3 Dimensions 04
3.4 Interface Layout 04
3.5 Local Installation Assistant 04
3.6 System Installation Sequence 04
3.7 DTU Installation Procedure 05
4. Site Creation on S-Miles Cloud (Hoymiles Monitoring Platform) 07
5. Customer Login 07
6. Complete Installation Map 08
7. Browse the Web-Based Plant 09
8. View Phone App 10
9. LED Indicator Working Status Description 11
10. Troubleshooting 11
11. Datasheet 12

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 02
Single-phase Microinverter 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).
1.2 Safety Instructions
Symbol Usage
Indicates hazardous situations that can result in deadly electric shock hazards,
other serious physical injuries, or fire hazards.
Indicates directions that must be fully understood and followed in their entirety
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.
• Note that only professionals may install or replace DTU.
• Do not try to repair the DTU without approval from Hoymiles. If the DTU is damaged, send the DTU back
to your installer for repairing/replacement. Disassembling the DTU without approval from Hoymiles will
invalidate the remaining warranty period.
• Read all instructions and warnings on the technical specications carefully.
• Do not use Hoymiles products in a way that is not suggested by the manufacturer. Doing so may cause
death or injury to persons or damage to the equipment.
1.3 User
This manual is intended for use by professional installation and maintenance personnel only.
1.4 Support and Contact Information
If you have technical queries concerning our products, contact your system installer or distributor. If further
support is required, contact Hoymiles’ support at this link.
• www.hoymiles.com
• Hoymiles Technical Service Center: [email protected]
1.5 Other Information
Product information is subject to change without notice. The user manual will be frequently updated, refer to
Hoymiles official website at www.hoymiles.com for the latest version.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 03
Single-phase Microinverter User Manual
2. About Hoymiles Microinverter System
2.1 The 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 panel-level
monitoring.
With conversion efficiency up to 96.7% and MPPT efficiency up to 99.9%, Hoymiles microinverters are among
the high-quality microinverters in the world.
2.2 The DTU
The DTU is a key component in the Hoymiles microinverter system. It works as the communication gateway
between the Hoymiles microinverters and the S-Miles Cloud (Hoymiles Monitoring Platform). The DTU
communicates wirelessly with the microinverters via 2.4 GHz Proprietary RF (Nordic), and collects the
operation data of the system. Meanwhile, the DTU connects to the Internet via the router and communicates
with the S-Miles Cloud (Hoymiles Monitoring Platform). The microinverter system operation data will be
uploaded to the S-Miles Cloud (Hoymiles Monitoring Platform) via DTU.
2.3 The S-Miles Cloud (Hoymiles Monitoring Platform)
It collects the operation data and status of the microinverters in the system and provides panel-level
monitoring for users and maintenance staff. The following diagram shows the operation of the Hoymiles
Microinverter System.
Microinverter
S-Miles Cloud (Hoymiles Monitoring
Platform)
Internet
Ethernet or Wi-Fi
Home Router
3. DTU Installation
3.1 System Capacity
The DTU is capable of monitoring up to four single units, two-in-1 units or one 4-in-1 units. If the
communication between the DTU and the microinverters suffers interference caused by installation
conditions, the number of PV modules that the DTU can monitor may be reduced.
3.2 Basic Conditions Required
Before installing the DTU, make sure that the site meets the following requirements:
• Install the DTU close to the router.
• Stable Internet connection.
• The straight distance between the DTU and the microinverter must be less than 5 meters.
• The location should be one meter above the ground and 0.8 meters away from corners.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 04
Single-phase Microinverter User Manual
Environmental requirements for DTU installation:
• Away from dust, liquid, acids, or corrosive gas.
• The temperature should be between -20ºC and 55ºC.
3.3 Dimensions
3.4 Interface Layout
Item Description
A USB Connector
B Status Indicator
C Reset Bottom
3.5 Local Installation Assistant
The Local Installation Assistant is a new function integrated with the DTU-WLite. Download the Installer App
(for installer/distributor use only) before use.
The DTU-WLite is improved over the previous generations of DTU product, and is developed with this new
function that allows the installer to:
A. Complete the Wi-Fi configuration in one step.
B. See how many microinverters under this DTU are working properly (and the details for each
microinverter) and how many are abnormal (and the details for each microinverter) at a glance through
the plant overall inverter status indication.
C. Add connection status, which displays the signal strength between each microinverter with connected
DTU, so that the installer can adjust the DTU installation location accordingly. This function simplifies
DTU installation and avoids a second visit for installer due to the poor connections between DTU and
certain microinverters.
Note: Refer to the “Hoymiles Local Installation Assistant Technical Note” for more details.
3.6 System Installation Sequence
The DTU is capable of monitoring up to four single units, two-in-1 units or one-in-1 units.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 05
Single-phase Microinverter User Manual
1. Install the microinverters and
PV modules
2. Install and power on the DTU
3. DTU Wi-Fi Configuration
4. Create a site on the
monitoring account
5. View system performance
6. Complete the installation map
3.7 DTU Installation Procedure
1) Install the PV Modules and Microinverters
Refer to the microinverter’s Manual or Quick Installation Guide for detailed installation steps.
2) Locate the DTU
The maximum communication distance of Hoymiles DTU is 150 m in open space. The walls, roofs, or other
obstacles in between will affect the signal and reduce the communication distance in actual installations.
The range of signal reduction for possible obstacles at the site is shown below:
Material Relative signal range reductions
Wood/Glass 0%-10%
Stone/Pressed cardboard 10%-40%
Reinforced concrete (reduction increases with the
amount of reinforcement) 10%-90%
Metal Up to 100%
Therefore, the DTU must be placed as close to the microinverters as possible at the site to ensure good
communication between the DTU and the microinverters.
3) DTU Installation
a. Connect the DTU to the adapter and plug it into the wall socket (Figure 1).

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 06
Single-phase Microinverter User Manual
Figure 1
b. If using a power strip, make sure that it is placed at least 1 meter above the ground, and try to install the
DTU at a 90 degree angle perpendicular to the ground (Figure 2).
Figure 2
Note: Please do not install the DTU directly above metal or concrete to prevent signal interference.
4) Start Procedure.
Once the DTU powers on, the red, green and blue lights will flash in sequence for one second each for 30
seconds.
5) Wi-Fi Configuration
Use the smartphone/tablet to open the Installer App and login. Locate “Me” on the bottom of the page and
select “Network Config”. Input the house router’s network name and password, then press “Send to DTU” to
complete the Wi-Fi configuration.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 07
Single-phase Microinverter User Manual
4. Site Creation on S-Miles Cloud (Hoymiles Monitoring Platform)
A. Install the Hoymiles Installer App by searching “Hoymiles” at App Store (iOS) or Google Play (Android).
B. Open the app and log in with your installer account name and password. If you are a new installer with
Hoymiles, apply for an installer account from your distributor in advance.
C. Add Plant, select the “Plant” tab on the bottom, then select “⊕” on the top right side of the page.
D. Select “Quick” for a single DTU and “Professional” for multiple DTUs.
E. Fill in the plant details accordingly, and press “Next” after this is complete.
F. Press “Add DTU SN”, scan the DTU SN (or you can manually input the SN) and press “Next” after this is
complete.
G. Press “Start pairing” and choose the angle and tilt based on the installation site.
H. Scan the Microinverter SN (or you can manually input the SN) and check the box after completing each
SN input. Press “Finish” once all Microinverter SNs have been added.
I. Disable the Scan function on the top right side and design the layout based on the installation site.
Check the box on the top right side, and then select “Next” after completing the design.
J. Upload a picture of the site and select “Finish” to complete the site creation.
K. The new site will appear on the plant list in the installer account.
L. Press the “Networking” button after the plant is created.
M. Wait about 30 minutes, after which the plant will be displayed as online, and all the Microinverter SNs
will be found.
5. Customer Login
A. Download the End User App. Search “Hoymiles” at App Store (iOS) or Google Play (Android).
B. Log in with the password and username that have been set up by installer in the previous step (Section 4
Step B), and press “Login”.
C. Customers will be able to view all details once the data starts to upload. Normally it will take around 30
minutes for the first data to come through.
D. Customers can also view the microinverter generating details by accessing the S-Miles Cloud (Hoymiles
Monitoring Platform) website at https://world.hoymiles.com.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 08
Single-phase Microinverter User Manual
6. Complete Installation Map
When the system is energized, and the DTU detects the microinverters, you need to complete the installation
map.
A. Peel the serial number label from the DTU and place it on the installation map.
B. Complete the system information of the installation map as shown below.
Model: DTU-WLite
Input: 5V
2A Made inChina
Data Transfer Unit

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 09
Single-phase Microinverter User Manual
7. Browse the Web-Based Plant
You can view the inverter’s real-time operating details on the computer web page by accessing the S-Miles
Cloud (Hoymiles Monitoring Platform) at https://world.hoymiles.com.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 10
Single-phase Microinverter User Manual
8. View Phone App
Download the mobile phone app by searching “Hoymiles” at App Store (iOS) or Google Play (Android) and log
in with the customer/installer account name and password, after which you will be able to view the operating
details of all installed microinverters there.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 11
Single-phase Microinverter User Manual
9. LED Indicator Working Status Description
Red Light Description
Flashes every 1 second DTU disconnected from Wi-Fi
Flashes every 0.5 seconds DTU disconnected from server
Blue Light Description
Flashes every 1 second No SN
Flashes every 0.5 seconds Received data from server
Green Light Description
Flashes every 0.5 seconds The search SN is incomplete
Lights up constantly Normal
RED+GREEN+BLUE Description
Each color flashes once every 1 second Power on
Each color flashes twice every 1 second Firmware upgrade
10.Troubleshooting
Indicator Status Description Solution
Red
LED flashes red
every 1 second.
DTU without
SN inside and
disconnected from
Wi-Fi.
• Check if the distance between the router and the
DTU is out of range (If it is, refer to Section 3.5
Point 2).
• Check if the distance between the router and the
DTU is out of range (If it is, refer to Section 3.5
Point 2).
• Double-check if the house router's password has
been correctly input during conguration.
• Use another device to connect with the house
router and make sure that there is an eective
reception.
• Try to connect with the hot spot from the phone
to see if any data uploads successfully.
LED red light is on
without flashing.
WLite with SN
inside but no Wi-Fi
connection.
LED flashes
red every 0.5
seconds.
DTU disconnected
from server
• Re-do conguration.
• Double-check the port and server address inside
the DTU (contact the Hoymiles Technical Service
Center for the correct address).
Blue
LED blue light
is on without
flashing.
WLite has Wi-Fi
connection but
without SN inside.
• Complete the site creation on the Installer App
or S-Miles Cloud (Hoymiles Monitoring Platform).
• Complete networking.
LED flashes blue
every 1 second. No SN. • Complete networking.
Green
LED flashes
green every 0.5
seconds.
The search SN is
incomplete
• Relocate the DTU to somewhere close to both
the router and the microinverter.
Note: Network Connection:
1. Connected to Wi-Fi, and the blue indicator lights up, then you can build the plant.
2. Cannot connect to Wi-Fi, and the indicator alternates red and blue flashes, then you need to connect the
DTU to the Wi-Fi again.

© 2022 Hoymiles Power Electronics Inc. All rights reserved. 12
Single-phase Microinverter User Manual
11.Datasheet
Model DTU-WLite
Communication to Microinverter
Communication method 2.4 GHz Proprietary RF (Nordic)
Maximum distance (open space) 150 m
Maximum number of panels connected 4 panels
Communication to Cloud
Wi-Fi communication standard Wi-Fi (802.11b/g/n)
Data upload time 15 minutes
Power Supply (Adapter)
Power supply External adapter with USB port
Adapter input voltage/frequency AC 100 to 240 V/50 or 60 Hz
Adapter output voltage/current 5 V/2 A
Power consumption 1.0 W (typical), 5 W (maximum)
Mechanical Data
Ambient temperature range (°C) -20 to 55
Dimensions (W × H × D mm) 143 × 33 × 12.5
Weight (kg) 0.1
Fixed method Direct power supply
Indicator light LED
Others
Standard EN 60950 EN 61000-3-2 EN 61000-3-3