Photovoltaic off-grid boiler
This solar boiler preheats your domestic water so that your electric water heater or gas boiler requires less energy to provide hot water. With the off-grid boiler, you become more independent of rising energy prices.
Characteristics
Off-grid capable hot water independent of the power grid and without registration of the photovoltaic system.
Warranty 3 years manufacturer warranty
Cost-saving hot water thanks to almost free photovoltaic power. Highly economical due to low initial investment costs and almost no running costs!
Plug and Play The photovoltaic modules are simply connected using MC4 connectors.
Environmentally friendly energy from the power of the sun! 100% renewable and sustainable! Save CO2 every day and actively contribute to climate protection.
-
Drinking water preheating
Ideally suited in combination with an electric instantaneous water heater.
-
reduce costs
Reduce your energy costs by using the free energy of the sun.
-
Commissioning without an electrician
Simply connect the photovoltaic modules to the solar boiler. The heating process begins immediately.
-
Innovative MPP tracker
50% higher yield thanks to the innovative MPP tracker, which always ensures the maximum yield of the PV modules.
Photovoltaic off-grid boiler at a glance
Whether in your own home, garden or holiday home, warm water is now available everywhere with the help of solar energy. Simply install the boiler, connect it to a water supply and plug in the solar power supply, and you're done. From now on you will have warm water wherever you need it.
The water boilers are available in sizes 10 l, 30 l and 80 l. They are easily mounted on a wall. A pressure relief and non-return valve is also included in the delivery. The water connection is made to two 1/2 inch connections with external thread.
The photovoltaic off-grid boiler heats the water with up to 550 W. In order to have sufficient water available even on cloudy days, up to 2,000 Wp of photovoltaic power can be connected.
65 °C water temperature
The maximum water temperature of the boiler is 65°C. When the 30-litre boiler is fully heated, around 72 litres of 34-degree water can be taken from it, for example for showering. The 80-litre boiler delivers around 180 litres of 34-degree hot water.
The installation of the photovoltaic modules is very easy thanks to plug & play connections. The modules are connected directly to the boiler via plug contacts (MC4). An extension cable can optionally be used to bridge longer distances between the photovoltaic modules and the boiler.
Information to download
Technical specifications
-
65 degrees water temperature
The maximum water temperature of the boiler is 65°C. Once the 30-liter boiler is fully heated, approximately 72 liters of 34°C water can be drawn from it, for example, for showering. The 80-liter boiler delivers approximately 180 liters of 34°C hot water.
-
Easy construction
Plug & Play: The photovoltaic modules are simply plugged into the solar off-grid boiler. The heating process starts immediately. Here is an image for illustration.
Installation: The boiler is hung in the boiler mounting device using two screws screwed into the wall. -
1/2 inch thread
Easy water connection: The 0.5 inch (1/2 inch) thread allows for easy connection of the solar off-grid boiler to the existing water line.
Connection plan "Offgrid / island system"
In the connection plan shown, 2 photovoltaic modules (optionally more or fewer possible) are simply connected to the photovoltaic off-grid boiler.
The heating process begins immediately after the photovoltaic modules are connected. Two or more photovoltaic modules are connected in parallel using photovoltaic parallel plugs . Anextension cable connects the photovoltaic modules to the boiler.
If the output of the photovoltaic modules exceeds the output of the boiler, the boiler regulates the maximum output of the modules down.
Since the entire system operates at protective extra-low voltage, no electrician is required for installation.
Excess photovoltaic power can optionally be easily fed into the home grid via a 600 W / 800 W Micro PV inverter using the fothermo switching device.
Read here how you can reduce about 75% of your hot water costs with the photovoltaic boiler.
Connection plan for water preheating - instantaneous water heater / gas boiler
Install the photovoltaic off-grid boiler in front of your existing instantaneous water heater or heating system. The water in the boiler is preheated by the energy from the photovoltaic modules. This means that the water only needs to be heated a little or not at all via the instantaneous water heater.
Excess photovoltaic power can optionally be easily fed into the home grid via a 600 W / 800 W Micro PV inverter using the fothermo switching device.
Read here how you can reduce about 75% of your hot water costs with the photovoltaic boiler.
Solar off-grid boiler sets
Further information on the photovoltaic off-grid boiler
Calculate heating times
Use our interactive tool to calculate the heating times of the off-grid boiler using solar power or mains power.
Example: Water preheating before an instantaneous water heater
Install the solar off-grid boiler upstream of your existing instantaneous water heater or heating system. The water in the boiler is preheated by the energy from the photovoltaic modules. Therefore, the water needs to be heated little or not at all by the instantaneous water heater.
Excess photovoltaic power can optionally be fed into the house grid via an 800 watt micro PV inverter using the fothermo switching device .
Read here how you can reduce your hot water costs by about 75% with a photovoltaic boiler.
3 years payback period
The conventional electric boiler is often the largest consumer of electricity in the home. It normally requires around 3.5 kWh of electricity per day, which equates to around 1,277 kWh per year. With an average electricity price of €0.31/kWh, this results in annual costs of €396.02 for hot water production.
A photovoltaic boiler, on the other hand, primarily uses solar energy. For example, if three photovoltaic modules with 430 Wp each (1.29 kWp in total) are connected to a boiler, these modules generate around 1,200 kWh per year. A large part of this electricity can be used to heat water. On cloudy days, however, additional electricity must be drawn from the grid to heat the water. With a photovoltaic off-grid boiler, you can usually save around 75% of hot water costs, which corresponds to around €300 per year.
digital display
A variety of different values can be read on the display of the off-grid boiler. These are:
- current water temperature in °C
- current photovoltaic output in watts
- current photovoltaic voltage in volts
- Total photovoltaic energy used in kWh
The maximum water temperature (10 °C to 65 °C in 5 °C increments) can also be set using the two buttons on the right edge of the display.
Thermal insulation
33mm insulating foam : All solar off-grid boilers have excellent thermal insulation. When the maximum water temperature of 65°C is reached in the evening, the 80-liter boiler only loses about 7°C by the next morning.
