© 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.
