Viessmann Vitovalor 300-P

Three reasons to choose a fuel cell heating appliance:

  • Generate heat and power today with the latest technology: put your money on futureproof heating using hydrogen and natural gas.
  • Make yourself more independent of rising electricity prices by using the fuel cell to generate power.
  • Heat more economically and save up to 30 percent energy costs through efficient heating with the fuel cell. This allows you to make long term savings whilst also protecting the climate through lower CO2 emissions!

DCR – The Viessmann experts to complete your installation:

Our understanding of the Vitovalor is driven by this knowledge, experience in the installation and design of the product and also a good understanding of the complete renewables market in which DCR have been MCS approved for many years.

Our design team can visit the property and ensure that the Vitovalor is correctly designed to suit the property and demands.

Additional to our vast experience of the Viessmann product our Vitovalor installation team comprises of directly employed NICEIC electricians and GAS SAFE heating engineers. This will ensure any DCR Vitovalor installation is completed by a individually qualified and dedicated team ensuring long term reliability and efficiency of the product.

DCR are approved MCS installers of the Viessmann Vitovalor. GAS SAFE & NICEIC heating engineers and electricians form the install teams. We can provide the complete design and installation program in which we work with construction companies to provide the correct system for the end client.

DCR have extensive knowledge of operating across the UK, for blue chip companies or for the domestic client. 2018 has been a busy year nationally for DCR in which during periods we have completed numerous large projects simultaneously with over 500 miles between them.

Customer Feedback

I can honestly say the service was beyond 5 stars in every way.
I am delighted with the installation of the boiler in the loft, and the NEST system is an extra bonus.Leigh and Luke were just fantastic. The staff worked hard, they were professional and conscientious in everything they did, and were a real credit to the company.  With a bit of singing thrown in for free I might add!I will certainly be leaving five star reviews.


Viessmann Vitovalor 300-P fuel cell

Vitovalor 300-P, the fuel cell from Viessmann, is the ideal energy centre for a modern detached or two-family house. The system combines heat and power generation on a very small footprint. Vitovalor 300-P offers considerably higher electrical efficiency than that available through current combined heat and power (CHP) solutions. This reduces the amount of heat extracted and makes the fuel cell heating appliance particularly suitable for use in new builds and renovations.

Vitovalor 300-P is the innovative alternative for decentralised power generation. Against the backdrop of discussions on energy and rising electricity prices, this solution is steadily gaining in relevance. In the future, CHP technology will be an important part of central power generation.

Fuel cell for detached and two-family houses

With 20 kW, Vitovalor 300-P offers sufficient thermal output to cover the entire heat demand of a detached or semi-detached homes – on a footprint of just 0.65 square metres. The maximum amount of electrical energy generated over the course of a day (16.5 kWh) is enough to cover the basic needs of an average household. The integral gas condensing boiler switches on automatically when the heat generated by the fuel cell module is insufficient, such as at peak times or when a lot of hot water is required for a brief period.

Proven and reliable: technology from Viessmann and Panasonic

As with all innovations from Viessmann, reliability and durability are the top priorities when it comes to the new fuel cell heating appliance as well. This is why a proven fuel cell module from Panasonic is used in the micro CHP unit. Viessmann has integrated this fuel cell, proven in more than 200,000 applications in Japan, into a perfectly matched heating system with gas condensing boiler, DHW cylinder and control unit.

Anticipates your needs: self-learning energy manager

The fuel cell heating appliances are heat led and power-optimised. The integrated energy manager is adaptive and responds to your individual requirements. This means that it only starts the natural gas/hydrogen driven heating appliance when it is worthwhile – when sufficiently long runtimes are expected and therefore corresponding power generation and on-site utilisation.

Additional power storage systems

The Vitocharge power storage system from Viessmann raises the on-site consumption rate in a household significantly. If the fuel cell heating appliance generates more power than is currently required, the surplus is generally exported to the grid. However, by combining Vitovalor 300-P with the Vitocharge power storage system, this power can be stored and used at a later time. This translates into a reduction of additional, expensive power drawn from the grid. For more information, go to Energy systems for Vitovalor 300-P.

Benefits of the Viessmann fuel cell heating appliance

  • Up to 30% lower energy bills compared with gas condensing technology
  • Increasing independence of electricity prices by generating power on site
  • PACE funding – making the costs of purchase comparable to those of a gas condensing boiler or solar thermal system
  • Compact design with a small footprint
  • Efficient and environmentally responsible technology of the future
  • High operating convenience via tablet or smartphone
  • Energy efficiency class: A++
  • Energy efficiency class, DHW heating: A

How Vitovalor 300-P works

Vitovalor 300-P is a fuel cell heating appliance that uses the principle of cogeneration to generate both power and heat. To do so, the fuel cell requires not only oxygen but also hydrogen, which is obtained from natural gas in an earlier process.

This technology, especially developed for detached and two-family houses, runs at a very high overall level of efficiency and is designed for power-optimised operation.


Altogether Vitovalor 300-P consists of two units: a fuel cell module and a gas condensing module for covering peak loads. The two units can be transported separately, enabling fast installation even in basement rooms where space is tight. The first unit of Vitovalor, made by Panasonic, houses the reformer, inverter and fuel cell stack (a series of multiple fuel cells). Before the direct current generated by the fuel cell is fed into the household power circuit, the built-in inverter converts it into alternating current.

The second unit of Vitovalor 300-P serves primarily to provide heat during times of peak demand. That is, when it is very cold outside or when a lot of hot water is required at short notice. It consists of a gas fuel cell appliance, a DHW cylinder, a heat exchanger and a heating water buffer cylinder with integral indirect coil for DHW heating. Other components in the second unit are a weather-compensated control unit, hydraulic components and an electricity meter. Both units are supplied via a common gas line. They also share a common flue system, which makes installation as easy as for a wall mounted gas condensing boiler.

Cold combustion

The generation of heat and power in Vitovalor 300-P fuel cell heating appliance is based on an electrochemical reaction between two elements: oxygen and hydrogen. The type of combustion that takes place in conventional boilers does not occur, which is why the process is also referred to as cold combustion. Although a plentiful supply of hydrogen is available in nature, it does not occur in the form required for cold combustion in the Vitovalor. It must therefore be obtained from natural gas in an earlier process. Depending on requirements, Vitovalor 300-P can be operated with natural gas H or bio natural gas. The combustion gas supplied flows through a reformer built into the unit, which uses a catalyst to convert it into hydrogen in a two-stage reaction. The first stage of the conversion process produces a mixture of hydrogen and carbon monoxide. In the second, downstream gas cleaning process, carbon monoxide is converted to carbon dioxide.

Vitovalor 300-P in a detached house

[1] Fuel cell module
[2] Peak load boiler
[3] Flue gas/ventilation air system
[4] Integral electricity meter
[5] Communication interface
[6] Electricity meter (bidirectional)
[7] Household power circuit
[8] Public grid
[9] Internet
[10] Vitotrol app
[11] Natural gas E
[12] Water


When electricity is generated, heat is also produced, which in large, conventional power stations is generally lost as unused waste heat. CHP units such as Vitovalor 300-P on the other hand make use of this waste heat for central and DHW heating. They therefore have a very high level of overall efficiency. Furthermore, there are no losses during energy transfer as the energy is used directly on site. Even the conversion from combustion gas to hydrogen is very efficient due to the absence of intermediate thermomechanical steps. The constant electrical output of the fuel cell module is 750 W. A large proportion of the power demand can therefore be covered at all times. Vitovalor 300-P works even more efficiently in combination with the Vitocharge power storage system. This can store surplus power for times of peak load which considerably increases independence from electricity suppliers. Alternatively, it is quite straightforward to export the surplus power to the public grid. The integral energy manager is self-learning and therefore optimises the level of on-site consumption.

Viessmann Vitovalor

Three reasons to choose a fuel cell heating appliance

  1. Generate heat and power today with the latest technology: put your money on futureproof heating using hydrogen and natural gas.
  2. Make yourself more independent of rising electricity prices by using the fuel cell to generate power.
  3. Heat more economically and save up to 30 percent energy costs through efficient heating with the fuel cell. This allows you to make long term savings whilst also protecting the climate through lower CO2 emissions!

Contact us today to enquire about this new money saving technology.

Viessmann Specialists

DCR Heating have developed a very strong partnership with Viessmann over many years with our team working on some of the very early Viessmann models installed within the UK. This partnership is based on providing our employees the highest level of training on Viessmann products and ensuring we are kept informed on new technologies and product developments both within the UK and Germany.


DCR offer with each Veissmann boiler installation a full 10 year warranty to ensure you have complete peace of mind which is important to DCR as our client. We intend to offer you the best level of customer service and aftercare for which warranty plays a vital role.

Download the Viessmann Domestic Gas Boiler Guide

Want to find out more about the Vitovalor 300-P ?

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  • Highly qualified and experienced
  • Friendly, helpful, and reliable.
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