Suns (company)

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logo
legal form GmbH
founding 2010
Seat Wildpoldsried
management Christoph Ostermann, Oliver Koch, Hermann Schweizer and Steffen Schneider
Number of employees 650
sales 68 million (2018)
Branch Energy industry
Website www.sonnen.de

The sun GmbH (equity and shorthand: sun ) is a company in the energy industry based in Wildpoldsried in Oberallgäu . It produces battery storage for private households and small businesses . The company is considered the market leader in Germany and other international markets. It is also the center of a community for electricity supply from renewable energies .

On February 15, 2019, the takeover of Sonnen GmbH by the British-Dutch energy group Royal Dutch Shell with its subsidiary Shell New Energies became known. Regulators have yet to approve the takeover.

Development of the company

company

Christoph Ostermann and Torsten Stiefenhofer founded the company in 2010 as a GmbH . The full name of the company at that time was PROSOL Invest Deutschland GmbH . In December 2013 the shareholders' meeting decided to change the company name to Sonnenbatterie GmbH in order to include the name of their product range and to support the desired internationalization. The company has been operating as Sonnen GmbH since November 2015 . Sun serves as the umbrella term under which the individual activities of the company are located.

business development

From 2008 to 2010, founder Torsten Stiefenhofer in particular developed a home battery that was sold under the name sonnenBatterie from 2011 . As a solar battery , the product is particularly aimed at homeowners with a photovoltaic system . Eight generations of this power storage system had been developed and marketed by mid-2016. Germany is the main market for the devices. The company also sells the home batteries in Austria , Switzerland , Great Britain , Ireland , Slovakia , the Czech Republic , Italy , the Netherlands , Sweden , Norway , the United States and Australia (as of October 2016).

Together with the change of name to Sonnen GmbH , the company announced in November 2015 that it would set up its own electricity community from 2016 onwards, whose members exchange electricity with one another. Since September 2016, owners of a sonnenBatterie who are members of this electricity community have been able to obtain electricity at a flat rate .

At the beginning of May 2017, Tennet and Sonnen announced plans to use decentralized photovoltaic home storage systems via a blockchain solution to stabilize the power grid and to improve the grid integration of renewable energies. For Sonnen customers there will be a new source of income if they participate in this solution. Furthermore, the planned blockchain pilot project is a way to improve, simplify and increase the efficiency of the networking of battery storage systems, photovoltaic systems and power grids. Economically , with the help of this technology and a battery pool from Sonnen, the redispatch costs for stabilizing the power grid could be reduced.

Business areas

Power storage

The battery storage system is used to increase the rate of self-consumption of self-generated electricity. Without this, a self-consumption share of 30–55 percent can be achieved with a photovoltaic system, provided that smart home functions can be used. With a storage system, this value can be increased to 60 to 80 percent, because the self-generated electricity can be stored until it is used in-house. The need to buy electricity in the morning or in the evening is decreasing.

The company has designed the sonnenBatterie as a complete system since its market launch . In addition to the battery modules, it has an integrated inverter , a unit for energy management and electronic meters for power consumption in the building, for photovoltaic power generation and for supplying power to the power grid. The energy management system evaluates the user's consumption data and includes weather data in order to determine the optimal time periods for loading and unloading the storage tank. The sonnenBatterie can also be combined with heat pumps , wind turbines or block-type thermal power stations.

The storage elements used are lithium iron phosphate accumulators . Sony is the main supplier of this component. The different models of the system differ mainly in the nominal capacity , given in kilowatt hours . In Germany, Sonnen was one of the first providers of lithium-ion batteries for stationary use in private homes and is considered the market leader in Germany and globally . Distribution does not take place through wholesalers , but through selected specialist dealers. From 2011 to mid-October 2016, 15,000 devices were sold. Most of them went to homeowners, but also to farmers and small businesses.

Community

The company has been organizing the sonnenCommunity since the first quarter of 2016 . It is an electricity producer group made up of operators of photovoltaic systems (homeowners and small business owners) who share excess electricity with one another. In order to avoid any electricity deficits in times of low sunshine, biogas plants are also included. Small wind generator operators can also provide electricity to the community.

The community combines three elements: the use of decentralized energy generation , modern battery storage technology and the digital networking of the participants. The concept is aimed at Sonnen customers . Interested parties receive a discount on the sonnenBatterie from the company when they join the community. All members obtain electricity from the community for less than grid electricity. In addition, Sonnen takes over the sale of the excess community electricity for them.

The company hopes that the development and expansion of the community will increase sales of its sonnenBatterien . In addition, every community member pays a monthly fee to Sonnen . In turn, the company is responsible for the measurement infrastructure and software.

At the beginning of October 2016, the number of members was around 3,000 households. The development of the community in Austria began in May 2016. The start of the Swiss customer platform has been announced for the third quarter of 2016.

Since September 2016, owners of a sonnenBatterie who are members of this electricity community have been able to obtain electricity at a flat rate.

Shareholder

In addition to the founders, several financial investors are involved in the company (as of October 2016):

  • In January 2013, eCAPITAL entrepreneurial Partners AG acquired a stake of around 30 percent for 3 million euros .
  • The entry of Chrysalix SET Management BV ( SET Ventures ) and Munich Venture Partners took place the end of 2014 as part of a capital increase of EUR 7.5 million, on which eCAPITAL also participated.
  • In the middle of 2015, Inven Capital, investiční fond, as ., A subsidiary of the Czech energy company ČEZ , invested in the company with a high single-digit million amount.
  • In June 2016, the company acquired GE Ventures , General Electric's venture capital subsidiary , as a further investor.
  • In October 2016, Sonnen received another 76 million euros from its investors. The Chinese company Envision Energy and Thomas Pütter, formerly CEO and ex- chairman of Allianz Capital Partners , were added.
  • In the EUR 60 million financing round in May 2018, Shell Ventures joined Sonnen as a new investor, and in February 2019 it was announced that Sonnen GmbH had been taken over by Shell and is still awaiting approval from the antitrust authorities.

Management and staff

The founders managed the company until the end of 2014.

At the beginning of 2015, the management was newly appointed. Hermann Schweizer replaced Torsten Stiefenhofer. Since then, he has been performing the duties of the Chief Innovation Officer . At the same time, Oliver Koch added to the management; he had previously switched the individual production of the battery systems to series production.

In October 2015, Philipp Schröder moved from Tesla back to what was then Sonnenbatterie GmbH and is responsible for sales and marketing in the management . Six other Tesla managers followed him within a few months.

Steffen Schneider has been Chief Financial Officer (CFO) at Sonnen since July 2017. Before that, he was CFO at SFC Energy AG, a listed provider of hybrid power supply solutions. He is responsible for the areas of finance, controlling, investor relations, human resources and information technology (IT).

The number of employees increased by a factor of 20 from its foundation to summer 2016. In June 2016 it was 200, 140 of them were employed in Wildpoldsried. In September 2016 the number of employees totaled 250. In October 2017 the company had around 400 employees.

Locations

By the end of 2015, the company manufactured all battery storage systems in Wildpoldsried - for marketing under its own name and as a white label manufacturer for Solarworld and RWE . In 2015, the company established a production facility in San José, California . It has been producing for the American market since the end of 2015. In June 2015, the company established in Atlanta ( Georgia ) a location for research and development , a tune to its own products to the conditions of the US market. In November 2018, Sonnen opened its third production site worldwide in Adelaide, Australia.

Awards

The company has received several prizes and awards:

  • In 2017 it received the Zayed Future Energy Prize in the Small and Medium-Sized Enterprises category .
  • The Massachusetts Institute of Technology (MIT) honored it as one of the world's 50 Smartest Companies in 2016 .
  • From 6,900 candidates, the company was included in the Global Cleantech 100 list for 2015 at the Cleantech Forum in San Francisco . The judges consider it the most innovative company in the Europe & Israel category .
  • The sun GmbH was among the winners of comparison of home batteries to the market and social research company EuPD Research conducted and its results, the Wirtschaftswoche published in June 2016th
  • The company is one of the winners of the StartGreen Awards 2015.
  • In October 2015, the company was named growth champion by Focus magazine . According to Focus and Statista , it was one of the ten fastest growing companies in Germany.
  • The company received the Step Award 2014, endowed with 100,000 euros, from the FAZ Institute and the industrial park operator Intraserv GmbH & Co. Höchst KG .

Memberships

The company is a member of the energy storage working group of the German Solar Industry Association . In November 2018, Sonnen's managing director Christoph Ostermann was elected to the board of BSW-Solar. In addition, Sonnen is a member of the German Energy Storage Association (BVES) .

Web links

Individual evidence

  1. ↑ Imprint of the website, accessed on October 2, 2017.
  2. ↑ Henning Peitsmeier: "Sonnen offers electric cars by subscription". Retrieved December 2, 2019 .
  3. ↑ sonnen GmbH, Wildpoldsried, annual financial statements for the business year from 01/01/2018 to 12/31/2018 in the Federal Gazette
  4. ↑ Sandra Enkhardt: EuPD Research: suns and Senec leader in the German photovoltaic storage market. In: pv-magazine.de. October 27, 2016, accessed November 1, 2016 . Energy storage: German providers lead in terms of market share. (No longer available online.) In: solarserver.de. October 27, 2016, archived from the original on November 1, 2016 ; accessed on November 1, 2016 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Sonnen (not Tesla) is the global leader in solar linked energy storage. In: bestmag.co.uk. October 27, 2016, accessed November 1, 2016 .  @1@ 2Template: Webachiv / IABot / www.solarserver.de
  5. ↑ Shell takes over sonnen, thereby expanding its range of storage solutions and energy services for private households. In: sonnen.de. February 15, 2019, accessed February 15, 2019 .
  6. ↑ Federal Gazette , commercial register announcements for PROSOL Invest Deutschland GmbH from January 15, 2014, date of entry from January 8, 2014.
  7. ^ Statement by Christoph Ostermann in an interview with Mirco Sieg. See Prosol Invest / Sonnenbatterie: Successful despite storage subsidies. In: pv-magazine.de. December 19, 2013, accessed September 22, 2016 .
  8. ^ Statement by Christoph Ostermann in an interview with Engelbert Hopf. See sonnenCommunity: The possible beginning of the end of conventional electricity suppliers. A startup on the way to becoming a 100 million euro company . In: Markt & Technik , issue 27/2016.
  9. ↑ See Daniel Pohl: Lithium iron phosphate: With the genes of a marathon runner . In: ees International. The Electrical Energy Storage Magazine , 1/2014, pp. 33–37, here p. 36. Benjamin Reuter: Energy: This home battery is supposed to stir up the electricity market . In: WirtschaftsWoche Green on June 5, 2014. Benjamin Reuter: Cleantech startups: These are the champions from Germany . In: WirtschaftsWoche Green from October 15, 2014.
  10. ↑ Angela Kanders: Battery storage systems are growing - economic institutes expect new installations of around 20,000 electricity storage systems this year. In: IKZ.de. June 15, 2016, accessed September 22, 2016 .
  11. ↑ Henrik Petersen: Storage tanks are not consumers . In: Photovoltaik , 4/2015, pp. 66–71, here p. 70. Cosmin Laslau: E.ON's new focus on renewables and what it could mean for energy storage and distributed generation. In: energy-storage.news. January 29, 2015, accessed September 22, 2016 . Sandra Enkhardt: Sonnen sold more solar batteries in the 1st quarter than Tesla Powerwalls. In: pv-magazine.de. May 11, 2016. Retrieved September 22, 2016 . Solar battery with new records . In: Allgäuer Zeitung of May 21, 2016. Solar Electric Ireland wins 'Product of the Show' at Energy Awards. In: passivehouseplus.ie. July 2, 2016, accessed October 6, 2016 . Jan Brož: ČEZ připojil první soláry na baterii z Německa. Investice se vrátí za 13 let. In: ekonomika.idnes.cz. July 21, 2016. Retrieved October 6, 2016 . sonnenBatterie is now also available in Norway . Company press release of October 11, 2016. See also the website ( Memento of the original of October 12, 2016 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. by the Swedish company CRenergy , accessed October 6, 2016 and the Sonnen website , accessed October 5, 2016.  @1@ 2Template: Webachiv / IABot / www.crenergy.se
  12. ↑ a b Nils-Victor Sorge: How seven ex-Tesla managers want to abolish RWE and Eon. In: Manager Magazin . November 26, 2015, accessed September 22, 2016 . Andreas Menn: Brothers, to the sun, to freedom . In: WirtschaftsWoche from November 27, 2015.
  13. ^ A b Wolfgang Kempkens: Bye, electricity bill. Company brings solar flat rate to market. In: WirtschaftsWoche. September 12, 2016. Retrieved September 22, 2016 .
  14. ↑ Michael Bauchmüller: Rescue network for electricity. In: Süddeutsche Zeitung . May 1, 2017, accessed June 6, 2017 .
  15. ↑ Sandra Enkhardt: Sonnen and Tennet are networking photovoltaic home storage systems using blockchain technology. In: www.pv-magazine.de. May 2, 2017. Retrieved June 6, 2017 .
  16. ↑ Daniel Wetzel: The door to a completely new energy world. In: Die Welt (online). May 2, 2017. Retrieved June 6, 2017 .
  17. ↑ Solar power also at night? In: Öko-Test Ratgeber Bauen und Wohnen 2015 , pp. 100–105, here p. 101. “Become more independent with storage” . In: efficiency homes , 6 / f 7-2015, p 48, here 48. "Intelligent solar battery" among the top 50. In: BR.de . September 22, 2016. Retrieved October 5, 2016 . Walther Rosenberger: Never again an electricity bill. In: Stuttgarter Nachrichten (online). September 20, 2016. Retrieved October 10, 2016 .
  18. ↑ See the technical data ( memento of the original from October 11, 2016 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. of the manufacturer on its website. For the integrated use of sonnenBatterie , photovoltaic systems and combined heat and power units, Sonnen works with Vaillant , among others , see Wolfgang Kempkens: This is how homeowners disconnect themselves from the power supply. In: WirtschaftsWoche Green. July 21, 2014, accessed September 22, 2016 . @1@ 2Template: Webachiv / IABot / www.sonnenbatterie.de
  19. ↑ a b c Heiko Schwarzburger: End customers virtually networked. In: Photovoltaik, 12/2015, pp. 72–74, here p. 73.
  20. ↑ See Reinhard Siekemeier, Ralf Ossenbrink: Solar energy in stock . In: Sonne Wind & Wärme , 13/2011, pp. 170–174, here p. 174. Uwe Bonnen: Also works at night and in bad weather. New recipes against rising additional costs . In: ew. Magazin für die Energiewirtschaft , Vol. 110 (2011), H. 26–27, P. 68 f. here p. 69. Michael Kerler: Green electricity from the closet . In: Augsburger Allgemeine of September 29, 2012.
  21. ↑ a b On the way to decentralized energy supply . In: Straubinger Tagblatt / Landshuter Zeitung of June 21, 2016.
  22. ↑ Jochen Knoblach: E-mobile manufacturer Tesla Tesla is driving the energy transition with house batteries. In: Berliner Zeitung (online). May 15, 2015, accessed September 22, 2016 . The article erroneously states that Sonnen was the first to offer it.
  23. ↑ Energy storage demand ramps up in Germany's residential PV market . In: Energy Storage Journal , Spring 2016, pp. 37–40, here p. 39. Sonnen (not Tesla) is the global leader in solar linked energy storage. In: bestmag.co.uk. October 27, 2016, accessed November 1, 2016 . Sandra Enkhardt: EuPD Research: Sonnen and Senec leading the German photovoltaic storage market. In: pv-magazine.de. October 27, 2016, accessed November 1, 2016 . Energy storage: German providers lead in terms of market share. (No longer available online.) In: solarserver.de. October 27, 2016, archived from the original on November 1, 2016 ; accessed on November 1, 2016 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.  @1@ 2Template: Webachiv / IABot / www.solarserver.de
  24. ↑ Ina Röpcke: Selling with passion . In: Sonne Wind & Wärme , 10/2013, pp. 94–97, here p. 95. Sonnen is not afraid of Tesla Powerwall. pv-magazine.de, March 21, 2016, accessed on September 22, 2016 .
  25. ↑ Vera Eckert: China's Envision joins investors in German battery firm sonnen cash boost. In: reuters.com. October 16, 2016. Retrieved October 17, 2016 .
  26. ↑ Representations for use in agriculture: A battery for solar electricity . In: Allgäuer Zeitung of May 22nd, 2014. Also: Use your own electricity more effectively . In: Bayerisches Landwirtschaftliches Wochenblatt dated June 27, 2014. Representation for an application in the commercial sector: solar battery: electricity in reserve . In: Hotel & Technology. The magazine for hoteliers, planners and investors , 6/2013, p. 54 f.
  27. ↑ a b Inge Kloepfer : Electricity from the closet. In: faz.net . December 6, 2016, accessed April 4, 2017 .
  28. ↑ Swarm storage for the community . In: ZfK newspaper for municipal economy from January 11, 2016. See also Felix Austen: The electricity depot in the basement . In: Bild der Wissenschaft from April 27, 2016. Beate Oberkofler: Solar power storage systems in the home are becoming economical. New concepts support the energy transition. In: press release on solarcluster-bw.de. May 18, 2016, accessed September 22, 2016 . The sun community. Energy freedom and energy community . In: pv magazine 6/2016.
  29. ↑ Beate Oberkofler: Solar power storage in the house is becoming economical. New concepts support the energy transition. In: press release on solarcluster-bw.de. May 18, 2016, accessed September 22, 2016 .
  30. ↑ a b c Helmut Bünder: Electricity from neighbors or rather from the email provider? In: faz.net. October 7, 2016, accessed October 10, 2016 .
  31. ↑ Sonnen starts customer platform in Austria. In: energate messenger. May 2, 2016, accessed September 22, 2016 .
  32. ↑ Swisscom Energy Solutions relies on the sun community . energate Messenger Switzerland from June 20, 2016.
  33. ↑ Caroline Strang: Sonnen GmbH: A flat rate for electricity. In: Alp Bote . October 8, 2016, accessed October 10, 2016 .
  34. ^ Company website .
  35. ↑ Benjamin Heimlich: "Now is the time to invest" . In: VentureCapital Magazin . Special supplement Cleantech, 2013. P. 10 f. Andrea Martens: Where less is more . In: Unternehmeredition Private Equity / M&A , 2014, pp. 6–14, here p. 14.
  36. ^ Company website .
  37. ^ Company website .
  38. ↑ Marc Roca: Sonnenbatterie ends financing round, new markets in sight. In: welt.de ( Bloomberg News message). December 3, 2014, accessed September 22, 2016 . Stefan Paravicini: Start-ups ushered in the energy transition a long time ago . In: Börsen-Zeitung of December 3, 2014.
  39. ^ Company website .
  40. ↑ Jason Hovet: Czech CEZ unit takes minority stake in German firm Sonnenbatterie. In: Reuters . July 9, 2015, accessed September 22, 2016 .
  41. ↑ Solar battery receives money from investor . In: Allgäuer Zeitung of July 11, 2015
  42. ^ Nils-Victor Sorge: General Electric allies with Bavarian medium-sized companies against Tesla. In: Manager Magazin (online). June 6, 2016, accessed September 22, 2016 . GE joins Allgäuer Sonnen GmbH. In: Handelsblatt (online). June 6, 2016, accessed September 22, 2016 . Vera Eckert, Andreas Cremer, Alexandra Hudson: German battery maker sonnen GmbH wins backing from GE. In: Reuters. June 6, 2016, accessed September 22, 2016 . Patrick McGee: GE takes stake in German renewable battery group Sonnen. In: Financial Times . June 6, 2016, accessed September 22, 2016 .
  43. ^ Company website .
  44. ^ Brian Parkin: Sonnen Considering IPO in Bid to Rival Tesla Powerwall Storage. In: bloomberg.com. October 16, 2016. Retrieved October 17, 2016 . Vera Eckert: China's Envision joins investors in German battery firm sonnen cash boost. In: reuters.com. October 16, 2016. Retrieved October 17, 2016 . Duitse manufacturer van zonne-energieaccu's Sonnen overweegt beursgang (Dutch). In: Het Financieele Dagblad. October 16, 2016. Retrieved October 17, 2016 . Brian Parkin: Sonnen GmbH is considering going public in the coming year. In: Die Welt (online). October 17, 2016, accessed October 18, 2016 . Sonnen collects 76 million . In: Handelsblatt of October 17, 2016.
  45. ↑ Kathrin Witsch: Shell is investing millions in German battery manufacturer Sonnen. In: Handelsblatt . May 22, 2018. Retrieved November 29, 2018 .
  46. ↑ https://www.golem.de/news/erneuerbare-energien-shell-uebernnahm-heimakku-steller-sonnen-1902-139433.html
  47. ↑ Sandra Enkhardt: Sonnenbatterie has continued high demand. In: pv-magazine.de. January 23, 2015, accessed September 22, 2016 . Manfred Gorgus: Personnel carousel at Sonnenbatterie GmbH. In: solar-professionell.de. February 3, accessed September 22, 2016 . For Oliver Koch, see also the entry in the Federal Gazette of January 22, 2015.
  48. ↑ Portrait: Ruth Fend, Kerstin Zilm: Against the river giant . In: Business Punk , 4/2016 of August 4, 2016, pp. 64–72.
  49. ↑ Nils-Victor Sorge: Tesla's Germany governor leaves after 20 months. In: Manager Magazin (online). August 19, 2015, accessed September 22, 2016 . Electro pioneer Tesla loses its boss in Germany . In: Frankfurter Allgemeine Zeitung of August 26, 2015.
  50. ↑ Rebecca Eisert: Manager shrinkage at Tesla Germany. In: WirtschaftsWoche. November 9, 2015, accessed September 22, 2016 .
  51. ↑ "Steffen Schneider becomes CFO at sonnen" . pv magazine. Retrieved October 20, 2017.
  52. ↑ "Intelligent solar battery" among the top 50. In: BR.de . September 22, 2016. Retrieved October 5, 2016 .
  53. ^ "Suns with about 400 employees" . The New York Times. Retrieved October 17, 2017.
  54. ↑ For this cooperation see battery storage: RWE subsidiary discovers solar. In: pv-magazine.de. December 9, 2013, accessed September 23, 2016 . Karsten Wiedemann: Solar storage market facing significant growth. In: bizzenergytoday.com. April 26, 2013. Retrieved September 23, 2016 . Also: Energy storage demand ramps up in Germany's residential PV market . In: Energy Storage Journal , Spring 2016, pp. 37–40, here p. 39. Sonnen is not afraid of Tesla Powerwall. pv-magazine.de, March 21, 2016, accessed on September 22, 2016 .
  55. ^ Ivan Penn: New ways to put energy in the bank. In: Los Angeles Times . October 11, 2015, accessed September 23, 2016 .
  56. ↑ Sandra Enkhardt: solar battery in front of Tesla Powerwall. First photovoltaic storage systems delivered to private households. In: pv-magazine.de. December 17, 2015, accessed September 23, 2016 .
  57. ^ Phil W. Hudson: German company opens Atlanta R&D facility to battle Tesla. In: Atlanta Business Chronicle (via bizjournals.com). June 10, 2015, accessed September 23, 2016 .
  58. ↑ Marija Maisch: Sonnen starts photovoltaic home storage production in Australia. In: pv magazine (via pv-magazine.de). November 27, 2018. Retrieved November 29, 2018 .
  59. ↑ Sandra Enkhardt: Sonnen receives Zayed Future Energy Prize. In: pv-magazine.de. January 16, 2017, accessed April 4, 2017 .
  60. ↑ List of the 2016 award winners (accessed on 23 September 2016).
  61. ↑ List of those honored in 2015 . Sandra Enkhardt: Sonnenbatterie recognized as Europe's most innovative company in 2015. In: pv-magazine.de. January 28, 2016. Retrieved September 23, 2016 . Citizens implement the energy transition on site . In: Bayerische Staatszeitung from February 26, 2016.
  62. ↑ Peter Vollmer: Daimler beats Tesla , in: Wirtschaftswoche , No. 25 of June 17, 2016. See also Peter Vollmer: These are the 93 best power storage devices for the home. In: Wirtschaftswoche (online). Retrieved October 5, 2016 .
  63. ↑ Information on the award and the 2015 winners ( memento of the original from October 11, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (Accessed on September 23, 2016). @1@ 2Template: Webachiv / IABot / start-green.net
  64. ↑ See Focus Special : Growth Champions 2016 . See also growth price for the solar battery . In: Allgäuer Zeitung from November 28, 2015 and citizens implement the energy transition on site . In: Bayerische Staatszeitung from February 26, 2016.
  65. ↑ 100,000 euro price for the Sonnenbatterie GmbH . In: Allgäuer Zeitung of January 10, 2015.
  66. ^ Petra Hannen: BSW-Solar: President Joachim Goldbeck confirmed in office. In: pv-magazine.de. November 22, 2018. Retrieved November 29, 2018 .
  67. ↑ Solar batteries PROSOL Invest GmbH Germany - Solar Battery GmbH. In: energyload.eu. January 5, 2014, accessed September 23, 2016 .