BayWa r.e. introduces initial results of an Energy Plus solar house
In February this year BayWa r.e. completed the construction of an Energy Plus solar house in Tübingen. The focus of this project was the intelligent linking of different system elements which would cover most of the energy demand of the building with energy from a photovoltaic source. BayWa r.e. will present the initial results of this project on 10th June at the Intersolar.
It has been BayWa r.e.'s aim to test energy provision solely based on photovoltaics in a practical demonstration. The interaction of innovative systems was of particular interest in this study. With the support of the Solar- und Wärmetechnik Stuttgart (SWT), a foundation created by the Institut für Thermodynamik und Wärmetechnik (ITW) of the Stuttgart university, the BayWa r.e. team developed a concept designed to supply a detached house with power, hot water and heating energy all based on PV.
Following the planning stage in 2014, BayWa r.e. installed a 30 kWp PV plant on a newly constructed building, compliant with the KfW Efficiency House Standard 55, earlier in 2015. The PV plant was oriented east to west and is part of a system comprising various components. Hoppecke provided an electric power storage system with an effective useful capacity of around 16 kWh; Stiebel Eltron provided the inverter air source heat pump as well as a 1500 l buffer cylinder. The special feature of the system as a whole is its energy management system: A SMA Sunny Home Manager communicates with the individual components and regulates these independently of insolation values and consumption to facilitate maximum on-site consumption. Günter Haug comments, "It was important for us to use standard components rather than special solutions associated with high costs. All products used are already part of our product range. At the same time this project gave us the opportunity to test new products made by our suppliers on behalf of our customers, for example the heat pump and the three phase standby power system."
The solar house focusses on the interaction of various components and the energy management system. An intelligent mix aims to achieve the highest possible overall efficiency. Records have now been kept since 15 February, giving us the first promising results. Haug remarks: "We cooperate closely with the manufacturers of the individual components. As a result of our suggestions, the controller software from one of the products supplied to us has already been revised in order to ensure an optimum energy flow."
For BayWa r.e., the solar house was not solely about demonstrating an intelligent form of energy provision, the trial project also delivers valuable know-how on how to develop competencies and experiences within the BayWa r.e. team, helping to support customers in consultations. "The project should demonstrate a concept which gives our customers new opportunities for an innovative deployment of PV technology and thereby opening new areas for business activities – in line with our slogan "r.e.sponsible for your success", continues Haug.
Project manager Elke Dehlinger will give a presentation at the Intersolar as part of the Renewable Heat Forum on Wednesday, 10th June entitled "Solar heat and power provision for buildings – the Energy Plus solar house by BayWa r.e." commencing at 14:10 h. Find out more at the BayWa r.e. stand: Hall B2, stand numbers: B2.450 & B2.551.
BayWa r.e. renewable energy GmbH (BayWa r.e.):
BayWa r.e. renewable energy GmbH, a wholly owned subsidiary of BayWa AG, is responsible for the BayWa Group's renewable energy business. BayWa r.e. was founded in 2009 and is based in Munich. It acts as a holding company for various business interests in the areas of solar energy, wind power, bio-energy and geothermal energy.
BayWa r.e.'s business activities range from project development and realisation to PV trade and consultation services. The company covers the entire spectrum of technical plant support services, including maintenance. It can also undertake the commercial operations management of plants. The range of services further includes energy trading of electricity from renewable sources, trading in biomethane, as well as the sale of green electricity and eco gas to private and commercial customers. The company has an international focus with its core markets in Europe and the USA.
BayWa AG, also based in Munich, is a listed trading company with an international focus. Core business sectors include agriculture, energy and construction.