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This balcony power station from Offgridtec presents you with a powerful solution with a total output of 810w, with which you can generate part of the electricity required for the household yourself. This significantly reduces the cost of overall electricity consumption. The system consists of two high-quality, bifacial glass-glass solar modules from Luxen each with an output of 405w and state-of-the-art technologies. To increase efficiency, an hms-800w-2t microinverter module inverter from Hoymilesis included. The set also includes a 10m long Hoymiles connection cable with a field connector for easy connection.

  • Bifacial glass-glass module
  • High-quality energy generation with high MPPT accuracy

How does a balcony power plant work?

The Offgridtec balcony power station is a space-saving Solaranstallation that consists of a solar module and a matching Hoymiles micro inverter to feed the electricity generated into the home power grid. Ideally, the inverter is attached directly to the substructure of the solar module and connected to the solar connector on the module. The 10m connection cable is connected via the battery connection of the inverter and routed directly to the appropriate socket. No special settings are required to use the solar power generated in the home's power grid. If electricity from other sources is available in the house, this is used preferentially and supplemented by mains power if required.

The complete balcony power station system includes:

Luxen glass-glass s5 405w

The monocrystalline and bifacial solar module 405w s5 from Luxen Solar (mpn: LNVB-405MD) impresses with a combination of different technologies, such as doping with the metal gallium, which prevents the phenomenon of light-induced degradation. Half-cell technology was also used in production to increase performance. And the manufacturer Luxen is confident in its product: it guarantees a 30-year service life.

At a glance: the Luxen s5

  • Gallium doping
  • reduced hot-spot temperature
  • Half-cut cell technology
  • high cell efficiency of over 20%
  • 30-year performance guarantee and 12-year product guarantee

Half-cell technology

With half-cell technology ("half-cut"), conventional silicon solar modules are cut in half using a laser. The resulting halves are then centrally connected in parallel, which leads to an increased output of the solar module by reducing resistance losses.

Bifacial cells

Bifacial means two-faced. And the name says it all: the Luxen Solar 405w module is also equipped with solar cells on the back, which means that the sunlight can be absorbed even better and the efficiency of the overall module is increased.

Gallium against light-induced degradation

Light-induced degradation - this means that modules lose some of their efficiency when they first come into contact with light. However, solar cells doped with gallium, such as those from Luxen, still have a high voltage even after prolonged exposure to sunlight and are more stable than cells doped with boron, for example.

Technical data

  • maximum output: 405w
  • Module voltage (Vmp): 37.33V
  • max. current (Imp): 10,85A
  • Open circuit voltage (Voc): 44.42V
  • Short-circuit current (Isc): 11.82A
  • Module efficiency: 20.74%
  • Dimensions: 1722 x 1134 x 30 mm
  • Operating temperature range: -40°C to +85°C
  • max. operating voltage: 1500v DC
  • Weight: 23.5 kg

Hoymiles HMS-800-2T

The hms-800w-2t (mpn: hms-800w-2t) from Hoymiles is the perfect micro inverter for your balcony power station. In addition to the integrated WiFi module in Industry+ quality to be mentioned here, the compact lightweight (only 3.2kg) is ideal for solar power production with up to two solar panels up to an output of 320 to 540+w each. Just like all other micro inverters from Hoymiles, it is suitable for long operating hours and wide PV module applications, as its starting voltage is very low (only 22v) and the DC input range of the operating voltage (16-60V) is extremely wide.


  • Integrated WiFi module
  • Minimization of the effects of e.g. shading, dust or aging through MPPT
  • High-quality energy generation with high MPPT accuracy
  • Optimum system reliability
  • Peak efficiency of 96.7%
  • 12-year product guarantee
  • High level of safety thanks to integrated protective functions
  • Simple installation
  • Long service life
  • Complies with vde-ar-n 4105: 2018, en 50549-1: 2019, vfr 2019, IEC/en 62109-1/-2, IEC/en 61000-6-1/-2/-3/-4, IEC/en 61000-3-2/-3

Optimum reliability

Micro inverter systems are inherently more reliable than conventional inverters. The decentralized design of a microinverter system ensures that a fault does not cause the entire PV system to fail. 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 complies with protection class IP67.

Technical data

  • Recommended module power: up to 320w - 540+W (per module)
  • MPPT voltage range: 16-60V
  • Switch-on voltage: 22V
  • Maximum input voltage: 65V
  • Maximum input current: 2*14A
  • Maximum input short-circuit current: 2*25A
  • Rated output power: 800VA
  • Rated output current: 3.48A
  • Nominal output voltage/range: 230v / 180-275V
  • CEC peak efficiency: 96.70%
  • Ambient temperature range: -40 - +65°C
  • Storage temperature range: -40°C - +85°C
  • Dimensions (WxHxD): 261 x 180 x 35.1 mm
  • Weight: 3.2 kg
  • Housing classification: IP67
  • Number of MPPTs: 2

S-Miles account position

The S-Miles account can be created directly by the end user. The instructions from Hoymiles can be found in the download area of this article.

Balcony power plants in Germany

There is currently no law or ordinance in Germany that regulates the generation of solar power for purely personal use. The maximum limit of 600w ac PV power is a reserve value which, according to the current VDE standard, can be fed into an existing socket circuit of a house without overloading it. Nothing is described for independent circuits without additional load. Every electrical installation should be VDE-compliant. However, operating a balcony power station via the standard earthed socket is not prohibited. Registration with the Federal Network Agency is mandatory. However, there are no known cases of fines for non-registration of balcony power stations or insurmountable problems with network operators. Compliance with and implementation of standards and obligations is the responsibility of the system operator. A great deal of technical and legal information can already be found on relevant websites.

Scope of delivery

1x 810W balcony power station Hoymiles hms-800w-2t with 2 x 405w bifacial glass modules

Hoymiles_HMS-600W&700W&800W&900W&1000W-2T_Datasheet.pdf Download
Hoymiles_Garantiebedingungen.pdf Download
LUXEN-SOLAR_SERIES-5_Bifacial-double-glass-full-black_385-405W.pdf Download
Hoymiles_Account_Einrichtung_Anleitung.pdf Download
Hoymiles_HMS_Cable-Accessoires.pdf Download
Hoymiles_HMS-600-2T_600W-2T-1000-2T_1000W-2T_Konformitaetserklaerung.pdf Download
Cell efficiency: 20,74%
Generator output wp: 405 Wp
Manufacturer: Offgridtec
Max. System voltage: 1500 DC (IEC)
Module voltage (VMP): 31,62 V
Open circuit voltage (VOC): 37,74 V
Short circuit current (ISC): 13,70 A
max. current (IMP): 12,81 A Reviews with
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