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Hot Water through the Power of the Sun

Fothermo specializes in photovoltaic water heaters, offering you a fresh approach to experiencing warm water. The products help you save costs on hot water supply and make you more independent and sustainable too.

Thanks to plug-and-play solutions, installation is particularly easy, and you don't need an electrician to get started, as all products operate in extra-low voltage. Since the products do not feed electricity into the grid, registration is generally not required.

Get started now and save hundreds of kilograms of CO2 for a sustainable and environmentally friendly hot water supply!


Fothermo is a leading supplier of highly efficient, reliable and cost-effective boilers and photovoltaic boiler systems. Whether you're looking to replace an old boiler or install a new one, you're sure to find the perfect solution for your needs with the wide range of Fothermo products in our online shop.

Fothermo Boiler: The first photovoltaic water boiler

Fothermo has developed the first photovoltaic water boiler for the garden, mobile home or caravan and mountain hut. A photovoltaic boiler is the perfect solution for an economical and self-sufficient hot water supply. Once installed, it supplies hot water free of charge for years.

Fothermo System: Photovoltaic water boiler with solar system

Installing the photovoltaic modules is particularly easy thanks to plug & play connections: the modules are connected directly to the boiler via standard plug contacts. If the solar energy is not sufficient to heat the water over a longer period of time, the optional 230-volt reheater can automatically reheat the boiler.

In our online shop you will find the entire Fothermo system, consisting of boiler and solar modules, in various designs as well as the necessary accessories.

Buy quality products from Fothermo online

The Fothermo is the perfect choice for anyone looking for an efficient and reliable heating solution. The products are easy to install, energy efficient and provide even heat in your home, mountain cabin or caravan. And when you shop in our online shop, you can be sure that you will receive the high-quality Fothermo products at a fair price, guaranteed. What are you waiting for?

If you have any questions, our team of experts is always on hand to offer help and advice. Feel free to call us on +49 8721 91994-00 or send an email to [email protected] if you need help with your purchase decision or would like personal advice.


  1. Can you make hot water with photovoltaics? The Fothermo photovoltaic boiler can provide you with hot water using the sun's energy. If the solar energy is not sufficient for a longer heating period, the boiler can be automatically reheated with the 230V reheater.
  2. How is a boiler operated? The Fothermo boiler is the first photovoltaic boiler and is therefore operated by sunlight. If solar energy is not sufficient, an optional 230-volt reheater can be used.
  3. Are Fothermo boilers suitable for camping? Fothermo boilers are ideal for camping trips or even Tiny Houses.
  4. Is Fothermo a quality brand? Fothermo is committed to technical excellence and guarantees high quality products. The systems developed by Fothermo are unique.