Hoymiles HM-400 microinverter module inverter

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The Hoymiles HM-400 is the perfect microinverter for your balcony power station. The compact lightweight (only 1.98kg including the 1.35m AC cable) is suitable for solar power production with a solar panel with a peak output of up to 500 watts. Just like all other Hoymiles microinverters, it is suitable for long hours of operation and wide PV module application because its startup is very low (only 22V) and the DC input range of operating voltage (16-60V) is extremely wide.


Minimizing the effects of eg shading, dust or aging by MPPT
High quality power generation with high MPPT accuracy
Optional: system monitoring via the smartphone app S-Miles Enduser or the S-Miles Cloud (data transmission unit DTU is required)
Optimal system reliability

Peak efficiency of 96.7%
12 year product guarantee
High level of security thanks to integrated protective functions
easy installation
Long lifetime
6000V surge protection
Complies with VDE-AR-N 4105: 2018 & EN50549-1:2019


The Hoymiles micro-inverter converts the solar power generated by your photovoltaic system in an AC grid-compliant manner and feeds it directly into the supply grid. Each Hoymiles microinverter is connected individually to a PV module in your system. This unique configuration causes each PV module to be controlled by an individual Maximum Peak Power Point Tracker (MPPT). This ensures that the maximum available power from each individual module is fed into the grid, regardless of the power of the other PV modules in the system. So if individual PV modules in the array are affected by shading, pollution, alignment, or mismatch, the HM-400 still ensures peak performance for its associated PV module. The result is the maximum possible energy production of your PV system.

Optimal reliability

Microinverter systems are inherently more reliable than traditional inverters. The decentralized structure of a microinverter system ensures that the entire PV system does not fail in the event of a fault. Hoymiles microinverters are designed to operate at full power in ambient temperatures up to +65°C (150°F). The housing of the micro-inverter is designed for outdoor installation and corresponds to protection class IP67.

Easy construction

PV systems with Hoymiles microinverters are very easy to plan and install. You can install a combination of PV modules of different types, in any orientation and in any desired number (maximum number of devices in series: 12). There is no need to install cumbersome conventional inverters. Each microinverter can be quickly mounted on the PV mounting stand or directly under the PV module. The PV module connects to the microinverter directly on site, eliminating the risk of people being exposed to dangerously high DC voltage.

Technical specifications

Recommended module power: up to 500W
Peak power MPPT voltage range: 34~48V
Starting voltage: 22V
Operating voltage range: 16~60V
Maximum input voltage: 60V

Maximum input current: 12.5A
Maximum input short circuit current: 15A
Rated output power: 400VA
Rated output voltage: 1.74A at 230V
Rated output current: 230V
CEC weighted efficiency: 96.50%
Ambient temperature range: -40~+65°C
Dimensions (WxHxD): 182 x 164 x 29mm
Weight: 1.98kg (including 1.35m AC cable)
Housing rating: IP67

scope of delivery

Hoymile's HM-400 microinverter