Solar system with Fothermo heating rod

The Offgridtec solar system with Fothermo heating rod is the perfect complete solution for self-sufficient hot water production using solar power. It combines powerful, bifacial Luxen Solar 450W PV modules with the innovative Fothermo photovoltaic heating rod for direct installation in standard hot water boilers. The set is available in versions with 2, 3, or 4 modules and includes all necessary connection components for quick and easy installation.

Self-sufficient hot water supply with the Offgridtec solar system

The set includes all the components you need to supply your existing hot water boiler with solar energy. The simple plug-and-play installation is particularly practical and can be carried out without the need for an additional electrician. You can flexibly configure the system with 2, 3, or 4 modules, depending on your individual hot water requirements and installation options.

Why this set is ideal for your hot water supply:

• 100% self-sufficient hot water production: Completely independent of the power grid thanks to direct solar heat.
• Highly efficient modules: Luxen Solar 450W bifacial full black modules with modern TopCon technology for maximum power yield – even in diffuse light.
• Easy retrofitting: The Fothermo heating rod fits into many standard boilers with a 1½-inch connection and makes existing systems solar-compatible.
• Plug-and-play: Quick installation including all necessary connection cables and connectors, no electrician required.
• Flexibly adaptable: Choice of 2, 3, or 4 modules depending on hot water requirements.

Components of the Offgridtec solar system with Fothermo heating rod

• 2x / 3x / 4x Luxen Solar 450W bifacial solar module TopCon Luxneri Series N5 Full Black (depending on selection)
• 1x Fothermo photovoltaic heating rod for hot water boiler
• 3x / 4x / 5x MC4 to MC4 6mm² 5m red/black connection cable (depending on selection)
• 1x Offgridtec 2-way branch socket Y-connector incl. cable extension (pair)

Luxen Solar 450W Bifacial Full Black Solar Modules with TopCon Technology

The Luxen Solar modules included in the set feature state-of-the-art N-TOPCon cell technology with a bifacial design, which increases performance by absorbing light on both the front and back.

• Maximum power: 450 W per module
• Module voltage (Vmp): 30.08 V
• Module efficiency: 22.52%
• Dimensions: 1762 × 1134 × 30 mm
• Weight: 24 kg
• Protection class: IP68

Fothermo photovoltaic heating rod for hot water boilers

The Fothermo heating rod converts the direct current from the solar modules directly into heat and efficiently heats your existing boiler – without a mains connection or inverter.

• Heating capacity: up to 550 W
• Voltage range: 30–90 V DC
• 1½-inch thread, suitable for standard boilers
• Protection class: IPX4
• Ideal for garden sheds, tiny houses, or self-sufficient systems

Connection components

• Offgridtec 2-way branch sockets Y-connector with 1 m cable extension (pair)
• MC4 to MC4 connection cable, 6 mm², 5 m (number depending on variant)

Hot water heating with solar energy – can be used anywhere

With this set, you can reliably generate hot water – without any connection to the power grid. The Fothermo heating rod activates automatically when exposed to sunlight and feeds excess PV power directly into the water tank. Operation is silent, maintenance-free, and particularly efficient thanks to DC direct heating.

• 100% solar-powered, no ongoing energy costs
• Ideal for self-sufficient systems, garden houses, cabins, and much more
• No inverter or grid connection required