940W Hoymiles HMS-800-2WB Balcony Power Plant with 470W Trina Solar Modules

This balcony power plant from Offgridtec offers a high-performance solution with a total output of 940W, allowing you to generate part of your household’s electricity needs yourself. This can significantly reduce the cost of your total electricity consumption. The system consists of two high-quality Trina Solar solar modules, each with an output of 470W, featuring state-of-the-art technology. To boost efficiency, the system includes an HMS-800-2WB microinverter from Hoymiles. The set also includes a 10-meter Hoymiles connection cable with a field connector for easy installation.

How does a balcony power plant work?

The Offgridtec balcony power plant is a space-saving solar system consisting of a solar panel and a matching Hoymiles microinverter to feed the generated electricity into the home’s electrical grid. The inverter is ideally mounted directly on the solar panel’s mounting structure and connected to the panel via the solar connector. The 10-meter connection cable is connected via the inverter’s battery port and routed directly to the appropriate outlet. No special configuration is required to use the generated solar power in the home’s electrical grid. If electricity from other sources is available in the home, it is used preferentially and supplemented by grid power as needed.

The Balcony Power Plant Complete System includes:

• 2x Trina Solar 470W Vertex S+ double-glass N-type TopCon solar module
• 1x Hoymiles HMS-800-2WB HiFlow 800 Pro Microinverter
• 1x 10m connection cable for Hoymiles HMS microinverter

Trina Solar 470W Vertex S+ Dual-Glass N-Type TopCon

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

Product highlights of the Trina Vertex S+ module

• Multi-busbar technology and N-type i-TOPCon technology
• High-density cell interconnection technology
• Double-glass for optimal reliability
• Low series resistance, improved current conduction

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: 1762 x 1134 x 30 mm

Hoymiles HMS-800-2WB

The HMS-800-2WB from Hoymiles (MPN: HMS-800-2WB) is a high-performance 2-in-1 microinverter for balcony, patio, or garden solar installations and small PV systems. It stands out with its particularly simple plug-and-play installation, two independent MPPT inputs for optimal module utilization, an integrated Wi-Fi and Bluetooth module for direct monitoring without additional hardware, as well as maximum system security thanks to IP67 protection, an isolated transformer, and certified cybersecurity.

Features

• Dual module control: Two independent MPPT channels for efficient energy yield—even in shaded conditions or with mixed modules
• Smart control: Integrated Wi-Fi and Bluetooth for direct app or cloud control without a separate data box
• Easy commissioning: Plug-and-play with Flex-S3 cable system, quick connection without complex electrical work
• Maximum safety: IP67 protection rating, fast emergency shutdown, isolated circuitry, and data protection in accordance with ETSI EN 303 645
• Silent, maintenance-free technology: Fanless cooling system, robust for indoor and outdoor use

Technical Specifications

DC input current

• Typically used module power: 320 to 540+ W
• Max. input voltage: 65V
• MPPT voltage range: 16–60V
• Min./Max. start voltage: 22/60 V
• Max. input current: 2 × 14 A
• Max. input short-circuit current: 2 × 25 A
• Number of MPPT trackers: 2
• Number of inputs per MPPT: 1

AC output current

• Rated output power: 800 VA
• Rated output current: 3.48 A
• Rated output voltage: 230 V (180 to 275)
• Rated frequency: 50/45 to 55 Hz

General

• Plug type: Flex-S3 field connector to Schuko
• Cable length: 5 m
• Peak efficiency: 96.70%
• Ambient temperature range: -40 to +65 °C
• Dimensions: 261 × 180 × 35.1
• Weight: 3.2 kg
• Protection rating: IP67 (external)
• Cooling: Natural convection – fanless

S-Miles Account Creation

End users can create an S-Miles account directly. Instructions from Hoymiles can be found in the download section of this article.

Balcony Power Plants in Germany

Currently, there is no law or regulation in Germany governing the generation of solar power for personal use only. The limit of a maximum of 600W AC PV power is a reserve value that, according to the current VDE standard, can be fed into an existing outlet circuit in a home without overloading it. There are no specifications for independent circuits without additional load. Every electrical installation should be carried out in accordance with VDE standards. However, operating a balcony power plant via a standard Schuko outlet is not generally prohibited. Registration with the Federal Network Agency is mandatory. However, there are currently no known cases of fines for failure to register balcony power plants, nor are there any insurmountable issues with grid operators. Compliance with and implementation of standards and obligations is the responsibility of the system operator. A wealth of technical and legal information on this topic is already available on relevant websites.