What is the Hoymiles collection?

The Hoymiles collection brings together microinverters for 1, 2, 4 or more panels, DTU gateways for Sub-1G/2.4G monitoring, single-phase and three-phase RS485 meters, and accessories (trunk/connector cables, terminations, tools). Its module-based architecture maximizes performance under shading, facilitates troubleshooting, and allows for scalable growth.

Advantages and limitations

• Optimized production per panel and greater tolerance to shading/mixed orientations.
• Comprehensive ecosystem: DTU for cloud, meters for export control, and a wide range of accessories.
• Modular installation and simple maintenance; ideal for future expansions.
• Limitations: higher number of devices on the roof and AC/trunk cabling planning; check input power and open-circuit voltage (Voc) of each PV module.

Applications

• Residential self-consumption with 1–8 panels per string and dynamic export control.
• Commercial/industrial with three-phase microinverters and centralized monitoring.
• Projects with solar panels in various orientations or with partial shading.

How to choose your Hoymiles solution

• No. of panels per microinverter: 1 (HMS-1T series), 2 (HMS-2T), 4 (HMS/HMT-4T), or 8 (MIT, industrial). Adjust nominal power per input to the PV module.
• Input voltage and current: confirm Voc and Isc of the panel under extreme conditions and ensure they do not exceed the microinverter limits.
• Single-phase or three-phase: HMS for 1P, HMT/MIT for 3P in commercial/industrial settings.
• Monitoring: select DTU (WLite-S, Lite-S, W100, Pro-S/4G, etc.) according to the number of devices and connectivity (WiFi/4G/Sub-1G).
• Export control: use smart meter (DDSU666/DTSU666) with the corresponding DTU.

Indicative specifications

Best practices

• Check Voc at minimum temperature and ensure a safety margin relative to the microinverter limit.
• Respect maximum current per input; avoid extreme mismatch between modules connected to the same device.
• Plan the trunk AC route, AC protections, and labeling. Implement DC protections if applicable in module strings towards optimizers/other devices.
• Install a meter at the main panel for export control and real-time consumption data.
• Place the DTU with good coverage; consider 4G in locations without stable Wi-Fi.

Quick comparisons

• HMS (1P): residential; 1–4 inputs per device, fast and scalable installation.
• HMT (3P): commercial; 4–6 inputs and balanced three-phase distribution.
• MIT (3P, high density): industrial; up to 8 inputs per device and centralized management.
• DTU WLite-S / Lite-S / W100 / Pro-S-4G: from 4 up to hundreds of modules, with 4G options.

Accessories and related collections

• Microinverters
• Inverter Accessories
• AC Electrical Protections
• Solar Panels
• Lithium Batteries

With Hoymiles you get a modular, scalable, and well-instrumented platform to maximize photovoltaic production, simplify maintenance, and control your installation in detail.