Homeowners Professionals
Vitovalor PA2

Fuel cell

With the Vitovalor PA2 fuel cell, you can turn your existing heating system into an efficient system that generates electricity and heat at the same time.

Output: 750 Wel, 1.1 kWth
High CO₂ savings
Generate electricity and save energy costs
Ideal addition to an existing heating system
High CO₂ savings

Make Vitovalor PA2 very environmentally responsible

Generate and consume your own electricity

And save energy costs this way

Ideal addition

The fuel cell efficiently supports existing heating systems.

Also suitable for apartment buildings and small commercial premises

The Vitovalor PA2 provides sufficient power

Integrated electricity, gas and heat metering

To provide billing information for state electricity subsidies and energy tax rebates

Energy cockpit

With display of power generation and consumption

Easily combined with heating water buffer cylinders

To use the generated heat for heating operation

High state subsidies

High state subsidies

Reliable and durable

Service life of at least 10 years

Maximum ease of use

With the generous 7-inch colour touchscreen

The Vitovalor PA2 fuel cell from Viessmann

The Vitovalor  PA2 fuel cell is the ideal addition to an existing heating system. With this proven device, you generate your own power. Self-consumption helps to achieve a high degree of self-sufficiency. You will become largely independent of the public grid and, therefore, of rising electricity costs.

Also suitable for apartment buildings and small commercial premises

The Vitovalor  PA2 supplies sufficient output for an annual power demand of up to 6000  kWh. The electrical energy of up to 18  kWh produced in the course of the day covers a large part of the basic demand, and is also suitable for supplying apartment buildings and small commercial premises with electricity.

The integrated range of solutions for Vitovalor PA2

Benefit from the value added services and digital services of Viessmann's integrated range of solutions.

ViCare app

The ViCare app provides intuitive heating control. Green for go – the user can see at a glance in the app whether their heating system is working as it should.

More about the ViCare app

ViGuide app

ViGuide is an app for trade partners. It has numerous functions for monitoring and controlling systems in both detached houses and apartment buildings and provides rapid access to Technical Service.

More about the ViGuide app

Connectivity Inside

Connectivity Inside is the integrated WiFi interface for operating and servicing systems using Viessmann apps.

More about Connectivity Inside

The special features of the Vitovalor PA2

The heat generated by the fuel cell can be used efficiently for heating. We recommend installing a Vitocell  100-E heating water buffer cylinder, which is available in versions with capacities of up to 950  litres. A combination with the Vitocell 340-M combi cylinder is also recommended.

With an installed height of only 1600 millimetres, the fuel cell can also be installed in rooms with low ceilings such as in basements. If there is already a Vitodens 200-W with a heating output of up to 26 kW in the building, the Vitovalor PA2 does not need its own exhaust system. Vitodens 200-W and Vitovalor appliances built in 2011 or later can be operated in a flue gas cascade.

As with all new developments from Viessmann, reliability and durability are top priorities when it comes to the Vitovalor  PA2. The fuel cell stack developed by Panasonic is designed for a service life of at least ten years. This corresponds to around 80,000 hours of operation. Maintenance of the module is required only once every five years. Service packages tailored to the appliance are available, which ensure up to 20  years' operation.

The Vitovalor PA2 fuel cell with a Vitocell heating water buffer cylinder

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Know-how: Virtually every house (newly built or modernised) can produce green electricity for its occupants and an electric car – with solar cells, a fuel cell, a power storage unit and the right technology, electricity and petrol costs can be reduced as much as possible. Andreas Czylwick, our expert for power and heating systems, explains how this works and how it pays off.

How does the Vitovalor PA2 fuel cell work?

The Vitovalor PA2 uses the principle of cogeneration to produce heat and power simultaneously. Hydrogen extracted from natural gas is used as the energy source. For more information, go to How the fuel cell works.

Functional principle of combined heat and power generation

Natural gas: perfect for fuel cells

The fuel cell uses hydrogen as its energy source. Hydrogen is the most abundant element in nature and is present in all organic compounds. Natural gas contains hydrogen as well as carbon. However, hydrogen does not exist in its pure form in nature. Natural gas is therefore used for the fuel cell. As the fossil fuel with the lowest emissions, it is highly suitable for obtaining pure hydrogen. The PA2 is preset for operation with natural gas E. However, it can be switched to natural gas LL.

MatriX cylinder burner

Ultimate operating convenience with a modern 7" colour touchscreen

The generous 7" colour touchscreen delivers the ultimate level of operating convenience. In the energy cockpit, users can track the current electricity yield as well as the consumption of electricity and gas.

7" colour touchscreen

Self-learning energy manager

The built-in energy manager ensures optimum operation. The self-learning electronics respond to the individual demands of your household or company. This means that the fuel cell is only switched on when sufficiently long runtimes can be expected, and therefore corresponding power generation and on-site utilisation, can be expected.

Product details

Electrical output

Fuel cell module: 705  W

Thermal output

1.1  kW


Electrical efficiency: 37  %

Energy efficiency class



Natural gas E(H) / LL(L)

Application area

Detached house, two-family house, apartment building, small commercial premises, modernisation

DHW heating

Possible in conjunction with Vitocell 340-M combi cylinder


Electronic platform with 7 inch colour touchscreen

Additional features

Integral electricity, gas and heat metering (to provide billing information for state subsidies and energy tax rebates)

Product cross-section
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