Simple and inexpensive photovoltaic water heating that is easy to install and commission.

Discover photovoltaic boilers

Photovoltaic hybrid boiler

The photovoltaic hybrid boiler is the better electric boiler. It replaces every "normal" electric boiler.
The heat is primarily generated by photovoltaic modules. If the sun doesn't shine, the hybrid boiler can automatically reheat with 1,500W via 230V mains power. The boiler is available in sizes 30L and 80L.

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Photovoltaic 200L and 300L boiler

The 200L and 300L photovoltaic floorstanding boilers provide affordable and C02-free hot water for the whole family. The photovoltaic modules are connected directly to the boiler. An integrated heat exchanger enables connection to an existing gas, oil or pellet heating system in order to be able to sufficiently reheat the water even on cloudy days.

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Advantages of fothermo products

plug & play

Photovoltaic modules are simply plugged into the products. Easy construction.

safety extra-low voltage

No electrician required for commissioning, as all products work with safety extra-low voltage.

No registration

No registration of the photovoltaic system necessary, since no electricity is fed into the grid.

Photovoltaic off-grid boiler

The photovoltaic off-grid boiler offers the ideal solution for a cost-effective and sustainable hot water supply in stand-alone systems such as summer houses, mountain huts or as drinking water pre-heating in front of a heating system or a continuous-flow water heater.

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switching device

When the photovoltaic boiler is fully heated, the excess electricity is fed into the home network. The power is fed in via a micro PV inverter. The currents are switched intelligently and fully automatically. With the switching device, you can use even more of the energy you generate.

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Photovoltaic boiler briefly explained

save costs

Generate your own solar power and save on expensive grid power immediately. Just install the PV module and connect it to the photovoltaic boiler. From now on you can produce your own free hot water.

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enjoy independence

Thanks to the inexpensive photovoltaic modules, hot water can be generated anywhere in the world. Even in the most remote places on this planet. The photovoltaic boiler does not require a connection to the power grid to operate. This is how you can easily make yourself independent.

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living sustainability

Energy from the power of the sun. 100% renewable and sustainable. With the photovoltaic boiler, you can not only generate hot water, but also become an active climate protector and save hundreds of kilograms of CO2.

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Discover the advantages of fothermo

cables instead of pipes

Simple plug & play installation in safety extra-low voltage. The energy is transported in power cables and not in pipes as in complex solar thermal systems.

Developed in Germany

Development of photovoltaic boilers in Ulm, Germany.

3 - 5 years payback period

As a rule, the payback period is a short 3 - 5 years. After that, you can basically use your hot water free of charge.

What our customers say

We have had this island system installed in our weekend house since mid-April 2022 and are overjoyed to finally have constant warm water for showering and hot water for washing dishes.

Ulrich B

Germany

In this way, solar energy from the balcony can also be used in the house without any bureaucracy and create some independence from gas.

Otto H

Germany

The installation of the water heater was worth it! Even if the conditions in Ireland are not always so good, the device always supplies enough hot water in a relatively short time.

Wolfgang E

Ireland

As a new customer, I would simply like to thank you for the direct service so far and the prompt delivery of the entire product, including the photovoltaic modules.

Questions are always answered quickly and financial questions are also clarified in an uncomplicated manner.

That says a lot for your company

Harold B

Germany