Offgridtec Solar-Direct 1880Wp Blackframe PV System with HMS-1600-4T and DTU-Lite-S

Offgridtec’s Solar Direct turnkey systems offer a practical way to generate part of your household’s electricity needs yourself and thereby reduce your electricity costs. The system includes four Trina Solar Vertex S+ solar modules, each with a power output of 470 W and a total module power of 1,880 Wp, a Hoymiles HMS-1600-4T microinverter with an output power of 1,600 VA, a DTU-Lite-S data transmission unit for system monitoring, and the listed connection and wiring cables. The solar modules can be mounted side by side if space permits and a suitable mounting structure is available.

How does the Solar-Direct PV system work?

The Offgridtec Solar-Direct PV system generates direct current (DC) using four solar modules. The Hoymiles HMS-1600-4T microinverter converts this into grid-compliant alternating current (AC), which is fed into the home’s electrical system and can be used by connected appliances. If the solar energy generated is insufficient, the additional electricity demand continues to be met by the public power grid.

When properly installed, the inverter can be mounted to the module substructure. The solar modules are connected to the inverter via the provided DC connectors. The AC-side integration into the home’s electrical system is achieved through a suitable, professionally installed connection solution. The existing electrical installation and connection conditions must be checked in advance.

Important Installation Note: The system has a rated inverter output of 1,600 VA and is not intended for independent commissioning by plugging it into a standard household outlet. The grid connection and commissioning must be performed by a qualified electrician in accordance with applicable electrical regulations and technical connection requirements. The included AC connection cable does not replace a professional inspection and installation of the grid connection.

The Solar Direct Complete System includes:

• 4x Trina Solar 470W Vertex S+ double-glass N-type i-TopCon solar modules
• 1x Hoymiles HMS-1600-4T microinverter
• 1x Hoymiles DTU-Lite-S Wi-Fi data transmission unit for HMT/HMS
  • A DTU Pro-S (not included) may be required instead of the DTU-Lite-S for additional setup and configuration options. The available functions depend on the specific system configuration.
• 1x Hoymiles HMS connection cable, 3x1.5 mm², 10 m
• 4x MC4-to-MC4 connection cables, 6 mm², 2 m

Trina Solar Vertex S+ 470W Solar Module

The Vertex S+ from Trina Solar (MPN: TSM-470-NEG9R.28) is a high-performance 470W double-glass solar module suitable for both residential and commercial applications. Thanks to advanced technologies such as high-density cell interconnection, the spacing between the solar cells is minimized, allowing more sunlight to be harnessed. Multi-busbar and N-type i-TOPCon technology further ensure higher light conversion efficiency, lower energy losses, and improved current conduction.

Features

• Multi-busbar technology and N-type i-TOPCon technology
• High-density cell interconnection technology
• Double-glass design for optimal reliability
• Low series resistance, improved current conduction
• Excellent resistance to fire and environmental influences
• 5,400 Pa snow load and 4,000 Pa wind load (test loads)
• High compatibility with inverters

Technical Specifications

• Power (Pmax): 470 W
• Voltage (Vmp): 46.1 V
• Max. current (Imp): 10.20 A
• Open-circuit voltage (Voc): 54.6 V
• Short-circuit current (Isc): 10.89 A
• Operating temperature: -40 °C to +70 °C
• Max. system voltage: 1500 V DC
• Cell efficiency: 23.5%
• Weight: 21 kg
• Dimensions: 1,762 x 1,134 x 30 mm

Hoymiles HMS-1600-4T Module Inverter

The HMS-1600-4T (MPN: HMS-1600-4T) from Hoymiles is a high-performance microinverter for grid-connected PV systems. This compact device, weighing 5.56 kg, is suitable for use with up to four solar modules, each with a recommended power output of 320 W to 540 W+. The low start-up voltage of 22 V and the wide MPPT voltage range from 16 to 60 V allow for use with a variety of compatible PV modules.

Technical Specifications

• Recommended module power: 320 W to 540 W+ (per module)
• MPPT voltage range: 16–60 V
• Start-up voltage: 22 V
• Maximum input voltage: 65 V
• Maximum input current: 4 x 14 A
• Maximum input short-circuit current: 4 x 25 A
• Rated output power: 1600 VA
• Rated output current: 6.96 A
• Rated output voltage/range: 230 V / 180–275 V
• CEC peak efficiency: 96.70%
• Ambient temperature range: -40 °C to +65 °C
• Dimensions (WxHxD): 331 x 218 x 40.6 mm
• Weight: 5.56 kg
• Enclosure rating: IP67

Installation and Grid Connection in Germany

The Solar-Direct PV system has a nominal PV power of 1,880 Wp and a nominal inverter output power of 1,600 VA. This exceeds the 800 VA inverter power limit applicable to simplified plug-and-play solar systems. It must therefore be installed as a grid-connected photovoltaic system in accordance with applicable technical regulations and connection requirements.

Connection to the home electrical system and commissioning must be performed by a qualified electrician. The electrician will inspect the existing electrical installation and ensure a suitable, standards-compliant connection solution. This system is not designed for self-commissioning via a standard household outlet.

The system must be registered in accordance with applicable legal requirements and the requirements of the responsible grid operator. This includes, in particular, registration in the Federal Network Agency’s market master data registry.