Energy storage


In addition to batteries for electricity storage, large water tanks have been in use for some time as heat storage systems in housing estates and neighbourhoods. Furthermore, hydrogen is mostly used in combination with efficient fuel cells as energy storage. In combination with heat pumps and with microelectronic controls, new possibilities of load management arise, whereby the systems can be designed economically. Some typical projects with such energy storage systems are presented here.

The projects are displayed in descending order of size in the default view.

Central power storage

    Plus-Energie-FertighausWelt Wuppertal

    Power storage capacity (kWh): 130 kWh

    42279 Wuppertal: The exhibition with 19 show houses in the "Efficiency House Plus" building standard on the 18,000 square meter site is a model project of the prefabricated construction industry for the development of energy-efficient settlements, sponsored by the BBSR. All model houses are networked with each other and have a central storage battery so that energy can be generated, stored and distributed collectively. Completion: 2013



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Energy self-sufficient solar house

    Power storage capacity (kWh): 19 kWh

    2_View79114 FreiburgModel project of the Fraunhofer Institute for Solar Energy Systems (FhG ISE); the entire energy consumption of a single-family household is covered by the solar radiation reaching the building. Special features are a solar hydrogen gas stove and a fuel cell, as well as several other new developments. Completion: 1992



    Show more >>
    – – – – – – – – – – – – – – – – – –

Heat accumulator with water

    Solar City Neckarsulm-Amorbach

    Water storage tank size: 63360 m³ (collector field size: 5884 m²)

    74172 Neckarsulm-Amorbach: the largest solar local heating project to date with a 150,000 m3 -The storage capacity was 65,000 m³ in 1997 and 115,000 m³ in 2001. The entire new development area with a total of 4,000 residential units has been realised in low-energy construction and is supplied via various local heating islands and CHP units. 2004: a biomass heating plant was put into operation. A housing estate with 1,300 units and a school are supplied by a solar system with seasonal storage.



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Building area "Hirtenwiesen II" with solar local heating in Crailsheim

    Water storage size: 39000 m³ (collector field size: 7410 m²)

    74564 Crailsheim: 250 residential units and a school with sports hall (Hirtenwiesenhalle). Solar local heat supply for the base load heat of 2000 apartments with 7,410 m² collector surface, a 39,000 m³ geothermal probe heat storage, two buffer storage tanks (100 m³ + 480 m³) and a compression heat pump (80 kW). Completion: 2008



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Solar residential complex "Helios

    Water storage tank size: 20000 m³ (collector field size: 1000 m²)

    18055 Rostock: 108 apartments in 11 buildings. Apartment sizes between 44 and 93 m². Location: Brinckmanshöhe residential park. Completion: 2000



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Energy storage of the Stadtwerke Heidelberg

    Water storage tank size: 12800 m³ (collector field size: m²)

    69123 Heidelberg-Pfaffengrund: Water from the district heating network is stored in the storage tank and fed back in when required.



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Solar City Wiggenhausen

    Water storage tank size: 12000 m³ (collector field size: 4056 m²)

    3 Collector view88045 Friedrichshafen: 570 apartments, 40,000 sqm living space, 4.2 million euros for solar technology = 5,500 euros additional investment per apartment = 83 euros/sqm living space, research project of ITW, Stuttgart, solar coverage ratio is of 50 % (heating and hot water), 4,056 sqm solar collectors, 12,000 cubic meters storage (33 m diameter, 20 m high)



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Exhibition grounds Oederan

    Water storage tank size: 8000 m³ (collector field size: 700 m²)

    09111 Oederan Chemnitz: 622 RESIDENTIAL UNITS. Model project for the Chemnitz technology and business park solaris, as well as the Stadtbau- und Wohnungsverwaltungsgesellschaft. 17 blocks of flats were renovated, 7 of them were equipped with 100 sqm collector surface each. Year of construction: 2000



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Solar local heating Ackermannbogen

    Water storage tank size: 6000 m³ (collector field size: 3000 m²)

    Ackerman arch180797 Munich: to 45% solar supplied housing estate consisting of 4 large blocks of flats as well as eight smaller town houses with a total of 319 flats (30,400 m2 floor area). The residential buildings were constructed and marketed by five property development companies. The solar district was the third of four construction phases of the Munich development "Ackermannbogen" (total size: 2,200 apartments, 500 workplaces and 9.2 ha of new green areas). Completion: 2006



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Solar settlement Bramfeld

    Water storage tank size: 4200 m³ (collector field size: 3000 m²)

    16brf53722175 Hamburg-Bramfeld: 130 WE, one of the larger solar local heating projects with a 4,000 m3-water storage tank. Completion: 2000



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Solar thermal plant Römerhügel in Ludwigsburg

    Water storage tank size: 2000 m³ (collector field size: 14800 m²)

    70806 Ludwigsburg: With a collector area of 14,800 m², Stadtwerke Ludwigsburg-Kornwestheim has built the largest solar thermal plant in Germany. In a 20-meter high heat storage tank with a volume of 2,000 cubic meters, the solar-generated energy is available even when there is little or no solar radiation. The collectors collect around 5200 megawatts of heat per year, enough to supply around 300 average households. Completion: 2020



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Energy bunker, IBA Hamburg

    Water storage tank size: 2000 m³ (collector field size: 6975 m²)

    21107 Hamburg-Wilhelmsburg: The former flak bunker in Wilhelmsburg has become a symbol of the climate protection concept Renewable Wilhelmsburg. The monument, which has been virtually unused since the end of the war, was refurbished as part of the IBA Hamburg and converted into a renewable power plant with large-scale heat storage. The energy storage facility has a volume of 2,000 cubic metres, which corresponds to 2,000,000 litres. It supplies the 120-hectare Reiherstieg district with climate-friendly heat and feeds renewable electricity into the Hamburg distribution grid.



    Show more >>
    – – – – – – – – – – – – – – – – – –

    NRW Solar Settlement "Steinfurth-Borghorst

    Water storage tank size: 1500 m³ (collector field size: 510 m²)

    0348565 Steinfurth-Borghorst: 42 units, project with solar local heating and seasonal storage (1st project of "50 Solar Housing Estates NRW"). Completion: 2000



    Show more >>
    – – – – – – – – – – – – – – – – – –

    "Solarcity" Hanover Kronsberg

    Water storage tank size: 1500 m³ (collector field size: 2750 m²)

    30539 Hanover-Kronsberg: Sub-project of the Expo 2000 new housing development. 106 apartments with large solar collectors on the roofs, as well as solar local heating with seasonal storage. It is located in the southeastern part of the district. Completion: 2000



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Wooden housing estate Ingolstadt

    Water storage tank size: 270 m³ (collector field size: 850 m²)

    1st construction phase by bogevischs buero architekten & stadtplaner gmbh. Photo: Julia Knop, Hamburg

    85049 Ingolstadt: With 116 units in timber construction out of a total of 142 units, this is one of the larger timber housing estates in Germany. It was realised in three construction phases, with 81 units by bogevischs buero architekten & stadtplaner gmbh, Munich; as well as 35 by Behnisch Architekten, Stgt. and 26 units by Brand Architekten, Ingolstadt (in mineral construction); client: St. Gundekar-Werk Wohnungs- und Städtebaugesellschaft mbH, Schwabach. Completion: 2011



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Solar local heating network in Moosach

    Water storage tank size: 100 m³ (collector field size: 1067 m²)

    85665 Moosach: In the community of Moosach, the cooperative Regenerative Energie Ebersberg eG and the company NATURSTROM AG have implemented a solar local heating network with a collector field of 1067 sqm and a buffer storage of 100 cubic meters. If the sun is not enough, a biomass boiler supports the energy supply. This is fed with wood chips from the region of maximum 40 kilometers. Completion: 2018



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Ford housing estate in Cologne

    Water storage tank size: 45 m³ (collector field size: 1000 m²)

    Cologne-Niehl: Redevelopment and addition of 11 apartment blocks with rental apartments. 300 flats before refurbishment, 345 flats after refurbishment. Average 47 m² before refurbishment, approx. 55 m² after refurbishment. Architecture: ARCHPLAN Münster. Client: State development company (LEG Wohnen NRW). Completion: 2010



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Solar housing estate in Köngen

    Water storage tank size: 7 m³ (collector field size: 160 m²)

    7_koengen73257 Köngen: Solar-supported local heating concept (hot water preparation by means of large collectors), low-energy construction. 72 WE



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Low-energy house residential complex "Am Dorf

    Water storage tank size: 6 m³ (collector field size: 168 m²)

    am-village69115 Heidelberg: 68 rental apartments with a heating energy requirement of less than 50 (kWh/m2a). Architect: Gerstner. Project participants: ifeu-Institut, ebök, among others. High standard under narrow margin of rent control in social housing. 170 m² solar thermal system, 200 m² solar power system with 23 kW. Building materials: materials containing PVC and CFCs as well as tropical wood were avoided. Wooden windows were installed, in heavily used areas wood-aluminium composite windows. Occupation: 1996



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Biosolar residential complex Ravensburg-Eichwiesen

    Water storage tank size: 5 m³ (collector field size: 115 m²)

    e388212 Ravensburg: Building biology terraced housing estate, 29 units, completion: 1993, architecture: Joachim Eble, client: Siedlungswerk Gemeinnützige Gesellschaft für Wohnungs- und Städtebau, Stuttgart. Solar-assisted local heating supply and first collective collector system (115 m² as a pilot project in Baden-Württemberg) generate 50 % of hot water with 5 m³ short-term heat storage. Price reduction of 50% compared to individual systems on each house.



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Living and working

    Water storage tank size: 3 m³ (collector field size: 50 m²)

    79_63_Nullabw79100 Freiburg-Vauban (project no. 3): zero wastewater house, passive house standard, 20 WEs, energy saving concept, biogas CHP, solar power system, alternative sanitation concept, completion: 1999



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Villa Deconstructa

    Water storage tank size: 2.4 m³ (collector field size: 12 m²)

    79206 Breisach: Active and passive use of solar energy, use of recycled building materials. Client and architect: Thomas Spiegelhalter, completion 1993



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Munzingen solar garden

    Water storage tank size: 2.2 m³ (collector field size: 32 m²)

    791_5_Munz79112 Freiburg-Munzingen: Solar garden, 8 units. Rolf Disch (Freiburg), Year of construction: 1993-1994



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Plus energy house "Heliotrope

    Water storage tank size: 1 m³ (collector field size: 31.5 m²)

    heliotrope_freiburg79100 Freiburg: the house turns to the sun and produces more solar energy than it consumes on average over the year. The house of the architect Rolf Disch, a pioneer of solar architecture, is probably one of the first and best-known plus-energy houses in the world. The Heliotrope is one of the few residential buildings in Europe to have a building-integrated biaxial tracking PV system. Completion: 1994



    Show more >>
    – – – – – – – – – – – – – – – – – –

    Energy self-sufficient solar house

    Water storage tank size: 1 m³ (collector field size: 12.4 m²)

    2_View79114 FreiburgModel project of the Fraunhofer Institute for Solar Energy Systems (FhG ISE); the entire energy consumption of a single-family household is covered by the solar radiation reaching the building. Special features are a solar hydrogen gas stove and a fuel cell, as well as several other new developments. Completion: 1992



    Show more >>
    – – – – – – – – – – – – – – – – – –

    "1st passive house" Darmstadt-Kranichstein

    Water storage tank size: 1 m³ (collector field size: 24 m²)

    Photo: Holger Wolpensinger64289 Darmstadt-Kranichstein: "Passive House", Passive House IWU (Inst. for Living and Environment) Darmstadt; Prof. Bott/ Ridder/ Westermeyer, exact north-south orientation. Completion: 1991



    Show more >>
    – – – – – – – – – – – – – – – – – –

Hydrogen storage

(list is in progress)