No problem! The water can be reheated automatically via 230V mains power. The power pack switches on automatically in bad weather phases or when there is an increased need for heat and ensures that the water is always kept at a certain minimum temperature. A 230V mains connection must be available as a prerequisite for the additional heating.

No! Because the boiler does not feed electricity into the grid. It forms a so-called island system.

Basically as many as you want. The integrated MPP controller regulates the power to a maximum of 550W. The more PV modules are connected to the boiler, the more unused excess energy there is, especially in the summer months.

The following configurations have proven themselves:

10 liter boiler: 1x PV module

30 liter boiler: 2x PV modules

80 liter boiler: 3x PV modules

There are several reasons for this:

1. Lower investment costs. Photovoltaic modules have become about 90% cheaper in the last 20 years.

2. Installation is much easier as only wires and no pipes need to be laid.

3. Unlike solar thermal systems, photovoltaic panels produce electricity (or heat) even in cloudy and cold weather. This is especially useful in winter when warmth is most needed.

4. There are no moving parts like pumps. This increases the service life and reduces the maintenance effort.

5. No freeze protection is required for the pipes.

Yes, an MPP tracker is integrated in every photovoltaic boiler. This optimizes the photovoltaic yield in all weather conditions.

The heating process starts from 7W photovoltaic output.

All PV modules with an open-circuit voltage of less than 42.4V specified in the data sheet can be connected to the boiler.

These are usually all 60-cell and 120-cell PV modules. PV modules with fewer cells (ie lower voltage) can also be connected.

Then the photovoltaic modules are simply switched off. Nothing happens. This is not harmful to the boiler or the photovoltaic panels.

We are currently working on a solution that allows excess electricity to be fed into the power grid. As soon as we have a finished solution, we will report about it.

No, this is not possible. A connected 12V / 24V battery can only be discharged by the boiler. But not loaded.

You can find more information on the product page for the photovoltaic boiler or the battery cable.

Yes. To do this, open the flange of the boiler on the underside under the cover. The inside of the boiler can then be wiped out with a damp cloth.

Nothing more is necessary. Please do not use vinegar cleaner or pointed objects to remove limescale.

The photovoltaic boiler is mounted on the wall like any other boiler. To generate your own hot water, simply connect your PV panels to the boiler. This takes a few seconds. And now a more detailed guide:

1. The boiler is mounted on a suitable wall using suitable screws. A hanging system for the boiler is included. (not screws)

2. The second step is to connect the boiler to the water supply network. As with any “classic” electric boiler, the connection is made via a 1/2" thread.

3. In the last step, the PV modules are connected to the boiler. If necessary, an extension cable can be used between the PV modules and the photovoltaic boiler.

Yes, that is possible. In this case, all the electricity required is drawn from the grid.

The boiler then draws just as much energy from the power grid as other electric boilers. This does not result in a cost advantage.

Yes, this is possible without any problems. To do this, the boiler must first be emptied. The flange can then be screwed on at the bottom of the boiler and the heating element can then be easily replaced.

Yes, we recommend the following post-heating devices for our boilers:

10 liters: 12 V post-heater (62 W)

30 liters: 18 V post-heater (140 W)

80 liters: 24 V post-heater (240 W)

Theoretically, however, all power supplies can be used. The 24 V post-heating device can also be used for the 10 liter boiler.

Theoretically yes! We recommend connecting the modules in parallel to ensure that the open-circuit voltage does not become too high.

In the case of a series connection, the sum of the no-load voltages must not be higher than 42.4 V.

It must be noted that at colder temperatures the no-load voltage is higher than specified.