HOYMILES DTU-PRO-S Gateway for HMT Series

Solar installations with Hoymiles microinverters need a reliable way to collect performance data and push it to the cloud. The HOYMILES DTU-PRO-S Gateway solves this by acting as the central communication hub between up to 99 microinverters and the S-Miles Cloud monitoring platform. It gathers real-time energy production, system status, and alarm information, then transmits it over Ethernet or Wi-Fi for remote monitoring and management.

Who is it for

This gateway is intended for solar installers and system owners who use Hoymiles HMT, HMS, HM, or MI series microinverters and want comprehensive, cloud-based monitoring without complex local infrastructure. It is suitable for residential and small commercial PV systems where remote oversight and export limitation are required.

Main features

• Supports up to 99 microinverters via Sub-1G wireless (868/915 MHz)
• Dual connectivity: Ethernet and Wi-Fi (2.4 GHz) for flexible network integration
• Local data storage for up to 45 days, ensuring no data loss during internet outages
• Real-time monitoring, remote control, and alarm management via S-Miles Cloud
• Integrated export limitation function for grid compliance
• Wall-mount design with USB, RS485, and Ethernet interfaces
• Low power consumption (< 2.5 W) with 5V DC / 2A power supply

Specifications

• Product type: Data Transfer Unit / Gateway
• Microinverter communication: Sub-1G (868 MHz / 915 MHz)
• Cloud communication: Ethernet, Wi-Fi (2.4 GHz)
• Max. microinverters supported: 99
• Supported microinverter series: HMT, HMS, HM, MI
• Power supply: 5V DC / 2A
• Power consumption: < 2.5 W
• Local data storage: up to 45 days
• Interfaces: USB, RS485, Ethernet
• Mounting type: Wall-mount
• Operating temperature: -20°C to +55°C
• Enclosure protection: IP20

Tips

For best wireless performance, install the DTU-PRO-S in a central location with minimal obstructions between the gateway and the microinverters. Use Ethernet for the most stable cloud connection, especially in areas with Wi-Fi interference. Ensure the power adapter provides a stable 5V DC output to avoid data interruptions.