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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 monitoring system 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.
