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Photovoltaic hybrid boiler

The photovoltaic hybrid boiler with 1,500 W after-heating via the 230 V power network replaces your existing electric boiler and saves up to 100% of your electricity costs for hot water production.

Buy a hybrid boiler
  • Up to 100% hot water supply

    You can cover up to 100% of your hot water needs using photovoltaics.

  • 550W + 1,500W

    550 W photovoltaic output and 1,500 W automatic after-heating via 230 V mains power on sunny days.

  • plug & play

    Easy installation. The photovoltaic modules are simply plugged into the boiler.

  • safety extra-low voltage

    Due to the low voltage level of less than 50 V, no electrician is required for installation.

Characteristics

75% energy saving
A 2-4 person household can use an 80 liter photovoltaic boiler to obtain around 75% of the energy required for hot water preparation from the photovoltaic modules. The remaining energy is drawn from the grid, especially in the winter months. With particularly economical hot water consumption, up to 100% of the requirement can be covered by the photovoltaic modules.

1,500 W electric post-heater
The powerful electric after-heating via the 230 V power network enables sufficient hot water to be produced even on the darkest days. Once the boiler has completely cooled down or been emptied, the water temperature can be heated back up to a high temperature within a short time.

Digital display on the boiler
An LC display provides information about the system, such as: B. the water temperature, the power and the energy already used!

Plug and play
The photovoltaic modules are simply connected using MC4 plug connections. Since the entire system works in safety extra-low voltage, no electrician is required for assembly/commissioning.

Direct current use
Direct use of the direct current from the photovoltaic modules to heat water. No inverter or battery is required for operation. This enables very easy commissioning and reduces costs and complexity.

Warranty 3 year manufacturer's warranty

Product description

The photovoltaic hybrid boiler is the ideal solution for cost-effective and sustainable hot water supply in your home. Hot water accounts for 20-40% of the energy consumption in a household. fothermo boilers are the easiest way to use the sun's energy directly. Once installed, the boiler produces free hot water using the power of the sun. With its high performance, the photovoltaic boiler serves as a replacement for a classic electric boiler. The automatic reheating via the power grid in bad weather ensures sufficient hot water even on days without solar radiation.

The boilers are available in the sizes 30 l and 80 l. It is easy to mount on a wall. A pressure relief and non-return valve is also included. The water connection is made to two 1/2 inch connections with external thread. The solar connection is made via the MC4 connector system.

With up to 550 W, the photovoltaic hybrid boiler heats the water using photovoltaic electricity. In order to have enough water available even on cloudy days, up to 2,000 Wp photovoltaic output can be connected and / or the 230 V electrical after-heating can be used.

1,500 W afterheating & assembly

In the event that there is not enough energy from the sun to heat up the water for a long period of time, the boiler can be automatically reheated using the 230 V post-heater. To activate the afterheating, the boiler thermostat is set to a minimum temperature. For example 35°C. As soon as the temperature of the water falls below the set minimum temperature, the water is reheated using electricity from the network with 1,500 W. The reheating process ends automatically as soon as the water has reached the set minimum temperature again.

The maximum water temperature of the boiler is 65°C. Once the 30 liter boiler is fully heated, around 72 liters of 34 degree water can be used, for example for showering. The 80l boiler delivers around 180 liters of 34-degree hot water.

The boiler is mounted on a load-bearing wall using two screws. A corresponding holding device is already installed on every boiler.

Installing the photovoltaic modules is very easy thanks to plug & play connections. The modules are connected directly to the boiler via standard plug contacts (MC4). Optionally, an extension cable can be used to bridge larger distances between the photovoltaic modules and the boiler. (Photovoltaic modules and extension cables are not included; these can be purchased separately in the online shop.)

The water pipes are screwed onto a standard 1/2" thread.

Standard Anschlussplan

Im dargestellten Anschlussplan werden 2 Photovoltaikmodule (optional auch mehr oder weniger möglich) einfach an den photovoltaischen Hybridboiler angesteckt.

Der Heizvorgang beginnt sofort nach Anschluss der Photovoltaikmodule. Mit Hilfe von photovoltaischen Parallelsteckern werden zwei oder mehr Photovoltaikmodule parallel geschalten. Ein Verlängerungskabel verbindet die Photovoltaikmodule mit dem Boiler.

Sollte die Leistung der Photovoltaikmodule die Leistung des Boilers überschreiten, regelt der Boiler die maximale Leistung der Module runter.

Da die gesamte Anlage in der Schutzkleinspannung arbeitet, wird kein Elektriker für die Montage benötigt.

Anschlussplan mit 600 W / 800 W Überschusseinspeisung

In diesem Beispiel wird überschüssiger Photovoltaikstrom über einen 600 W / 800 W Mikro PV Wechselrichter ins Hausnetz eingespeist. Hierfür wird das fothermo Umschaltgerät als Energiemanager benötigt.

Das Umschaltgerät erkennt, wenn der photovoltaische Hybridboiler den Heizvorgang beendet hat oder wenn mehr Photovoltaikleistung zur Verfügung steht, als vom Boiler in Wärme umgewandelt werden kann. In diesen Fällen wird überschüssige Energie ins Hausnetz eingespeist.

An besonders sonnigen Tagen beginnt das Umschaltgerät bereits früh morgen mit der Teilüberschusseinspeisung von 1 - 2 Modulen. Dies sorgt dafür, dass bereits in den Morgenstunden die elektrische Grundlast des Hauses abgedeckt wird.

So sparen Sie neben den Warmwasserkosten auch Stromkosten. Keine Energie geht verloren.

Einfache Installation

Die Installation der Photovoltaikmodule ist dank Plug & Play-Anschlüssen sehr einfach. Die Module werden über Standard Steckkontakte (MC4) direkt an den Boiler angesteckt. Optional kann ein Verlängerungskabel für die Überbrückung von größeren Strecken zwischen den Photovoltaikmodulen und dem Boiler genutzt werden. Werden mehrere Photovoltaikmodule verwendet, werden Parallelstecker benötigt.

Information to download

Data sheet German
Datasheet English
operation manual
Which and how many photovoltaic modules?

fothermo photovoltaic hybrid boiler - generate hot water with photovoltaics and save costs

This video explains how the photovoltaic boiler works, how it is connected to the photovoltaic modules and how much money it saves.

possible applications

Replacement of a "normal" electric boiler

The photovoltaic hybrid boiler is like a “normal” electric boiler. But with one special feature: primarily the free energy from the sun is used. As a rule, the 80L hybrid boiler can reduce 60% - 80% of the hot water costs in a 2-person household. The photovoltaic modules are connected directly to the boiler.

Tiny house / mobile home

Whether in a tiny house or in a mobile home. Wherever you need warm water, you can use the photovoltaic hybrid boiler.