2.7kWp solar system with 300L Fothermo boiler for hot water preparation

The Offgridtec 2.7kW solar system with a 300L Fothermo boiler (MPN 018920) offers a comprehensive solution for your hot water supply. It includes 6 bifacial solar modules from Luxen Solar, each with a power output of 450Wp, as well as all necessary cables to ensure a seamless installation. The photovoltaic stand boiler features an integrated heat exchanger for an environmentally friendly supply of hot water and can be easily connected to existing heating systems.

You can use hot water in the sink, shower, or kitchen without having to connect to the power grid. Thanks to the plug-and-play principle, the installation of the solar system can be done effortlessly with just a few steps.

Components of the Offgridtec 2.7kW Solar System with 300L Fothermo Boiler

• 6x Luxen Solar 450W Bifacial TopCon N5 Full Black Solar Modules
• 1x Fothermo 300 Liter Photovoltaic Boiler
• 3x Offgridtec 2-fold Branch Connectors Y-Connectors including Cable Extension (Pair)
• 3x Connection Cables MC4 to MC4 6mm² 10m red/black

Fothermo Photovoltaic Water Boiler 300 Liters - Water Heater

The Fothermo 300L water boiler utilizes solar energy for cost-effective and environmentally friendly hot water. With three independently operable photovoltaic heating elements, it delivers hot water quickly and reliably. The 3 MPP trackers and DC heating elements provide a photovoltaic heating capacity of up to 1,800W.

Flexible inlets and outlets allow for individual mounting, including the option to connect a circulation line. The boiler comes equipped with pressure relief and non-return valves. The stand boiler can utilize a total photovoltaic capacity of up to 6000Wp. The integrated heat exchanger allows for direct connection to an existing heating system, ensuring adequate hot water supply even on days with low sunlight.

Technical Data Fothermo 300L Water Boiler

• Volume: 300 Liters
• Max. Heat Loss: 50.2W
• Nominal Pressure: 0.8 MPa
• Dimensions: 1605 x 670 x 760 mm
• Weight: 88kg
• 3 MPP Trackers

Heat Exchanger

• Nominal Pressure: 1 MPa
• Max. Temperature of Heating Fluid: 110°C
• Max. Temperature in the Tank Heated by the Heat Exchanger: 95°C
• Area: 1.12 m²
• Volume: 5.4 Liters
• Continuous Power according to DIN 4708: 35kW
• Flow Rate according to DIN 4708: 14 L/min
• Power according to EN 12897: 19.3kW
• Heating Time according to EN 12897: 39.4 Min
• Pressure Drop: 50 mbar

Photovoltaic Heating

• Max. Current Consumption: 16A
• Electric Rated Power: 1800W
• Max. Connected Power: 6000Wp
• Max. Connected Power per MPPT: 2000Wp
• Max. Water Temperature: 65°C
• Max. Open Circuit Voltage: 50V

Supplementary Heating

The boiler can be supplemented in various ways during periods of insufficient sunlight. One option is to utilize an existing pellet, gas, or oil heater, which can be connected to the boiler via the integrated heat exchanger. A temperature sensor within the boiler controls the supplementary heating. Alternatively, an electric heating element with a 6/4 inch thread can be installed. The maximum water temperature is 65°C, and a heated 300-liter boiler can provide approximately 675 liters of water at 34°C.

The Bifacial Luxen Solar 450W Full Black Solar Module

The bifacial 450W Full Black solar module of the Luxneri N5 series from Luxen Solar (MPN LNDX-450ND) sets new standards in solar technology. It combines innovative technologies such as LECO N-TOPCon cell technology and a 96-cell half-layout to maximize efficiency. The SMBB Half-Cut cell technology is also employed to optimize performance.

• LECO N-TOPCon Cell Technology
• SMBB Half-Cut Cell Technology
• Low BOS & LCOE
• Bifacial Cell Module Technology
• Excellent Anti-PID and Low LID Performance
• 3 Bypass Diodes - minimized power loss during shading

Technical Data

• Maximum Power: 450W
• Module Voltage (Vmp): 30.08V
• Max. Current (Imp): 14.96A
• Open Circuit Voltage (Voc): 35.21V
• Short Circuit Current (Isc): 16.02A
• Module Efficiency: 22.52%
• Max. Operating Voltage: 1500V DC
• Operating Temperature Range: -40°C to +85°C
• Dimensions: 1762 x 1134 x 30mm
• Cells: 96 (6x16)
• Protection Class: IP68
• Connection: MC4
• Weight: 24kg