variants
The 200 liter and 300 liter photovoltaic storage tank ensures a cost-effective and sustainable hot water supply in single-family homes. Make yourself more independent from rising energy prices.
Characteristics
1,800W photovoltaic heating capacity high photovoltaic heating capacity to provide hot water for up to 6 people.
Simple photovoltaic connection The photovoltaic modules are simply connected to the electrical terminals of the boiler. All you need is a simple screwdriver.
Warranty 3 year manufacturer's warranty
Cost-saving hot water thanks to almost free photovoltaic electricity. High profitability due to low initial investment costs and almost no operating costs!
Heat exchanger An integrated heat exchanger enables the connection of an existing gas, oil or pellet heating system.
Environmentally friendly energy from the power of the sun! 100% renewable and sustainable! Save CO2 every day and actively contribute to climate protection.
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1,800 W heating output
3 MPP trackers and DC heating elements provide up to 1,800 W of photovoltaic heating power.
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6,000W connected load
Up to 6,000Wp photovoltaic output can be connected. The boiler heats the water with up to 1,800W.
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Registration free
No registration of the PV system is necessary as no electricity is fed into the grid. Hot water supply independent of the 230V mains power.
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Simply connect oil, gas or pellet heating
An existing heater can be connected directly to the heat exchanger integrated in the boiler in order to have sufficient hot water available even on days with little sunshine.
Photovoltaic storage at a glance
A CO2-free hot water supply for up to 6 people. The photovoltaic 200L and 300L boilers provide enough hot water to completely switch off your existing heating system in the summer.
The photovoltaic storage tank has 3 independently operating photovoltaic heating elements installed. Each heating element is supplied by an MPP tracker. Up to 2,000 Wp of photovoltaic power can be connected to each heating element.
The heating elements in the storage tank heat the water with up to 1,800 W. In order to have sufficient water available even on cloudy days, up to 6,000 Wp of photovoltaic power can be connected. Alternatively, additional heating via an existing heating system is possible.
The maximum photovoltaic heating temperature of the storage tank is 65°C. Once the 200-litre storage tank is completely heated, around 450 litres of 34-degree water can be taken from it, for example for showering.
Product description
The 200 liter and 300 liter photovoltaic storage tank is integrated into the heating system like any other domestic hot water storage tank. Different water inlets and outlets enable flexible installation depending on the available space. It is also possible to connect a circulation line.
Two magnesium anodes installed in the tank protect the enamelled steel tank from possible corrosion. The main anode attached to the upper end is easy to replace if necessary.
The heat exchanger integrated in the storage tank has a transfer capacity of more than 18 kW. This ensures rapid reheating via a gas boiler, for example, in the event that the sun is not shining sufficiently.
Each storage tank is also supplied with a pressure relief and non-return valve.
Information to download
Connection and commissioning
The extension cables of the photovoltaic modules are screwed directly onto the storage tank. All you need is a simple screwdriver.
Parallel plugs allow you to easily connect several photovoltaic modules in parallel. This keeps the electrical voltage of the system low. This saves costs because you can connect and commission the photovoltaic modules without an electrician.
easy installation
The installation of the photovoltaic modules is very simple thanks to plug & play connections. The modules are plugged directly into the storage tank. Anextension cable can optionally be used to bridge longer distances between the photovoltaic modules and the storage tank. If several photovoltaic modules are used, parallel plugs are required.
Experience report: 29,000 liters of hot water for a household of 5
The photovoltaic standalone boiler produces more than enough hot water for a 5-person household most of the year. Connecting the photovoltaic modules is very cost-effective as no electrician is required for commissioning. And since no electricity is fed into the grid, the photovoltaic system is also registration-free. Since no mechanical components are necessary to operate the boiler, the photovoltaic boiler is also almost maintenance-free.
Connection plan with surplus feed-in
In this example, excess photovoltaic power is fed into the house grid via a 600 W / 800 W micro PV inverter. The fothermo switching device is required as an energy manager for this.
The switching device detects when the storage tank is fully heated or when more photovoltaic power is available than the storage tank can convert into heat. In these cases, excess energy is fed into the house network.
This means you save on electricity costs as well as hot water costs. This is a huge advantage over solar thermal energy. No energy is lost.
The stand storage explained in the video:
How does the photovoltaic storage tank from fothermo work? What connections does it have and how do I combine the storage tank with my existing heating system?
Photovoltaics vs. solar thermal energy: The advantages of photovoltaic water heating?
Photovoltaic water heating has many advantages. Perhaps the biggest advantage is the ability to feed excess electrical energy into your own home network via a micro PV inverter. This means that not only heat costs but also electricity costs can be reduced.
Experience report: 29,000 liters of hot water for a household of 5
The photovoltaic storage tank produces more than enough hot water for a 5-person household most of the year. Connecting the photovoltaic modules is very cost-effective, as no electrician is required to set them up. And as no electricity is fed into the grid, the photovoltaic system does not need to be registered. As no mechanical components are required to operate the storage tank, it is also almost maintenance-free.
