{"id":15206,"date":"2015-10-02T11:13:56","date_gmt":"2015-10-02T10:13:56","guid":{"rendered":"http:\/\/en.sma-sunny.com\/?p=15206"},"modified":"2017-12-13T16:09:46","modified_gmt":"2017-12-13T15:09:46","slug":"quality-pays-off","status":"publish","type":"post","link":"https:\/\/www.sma-sunny.com\/en\/quality-pays-off\/","title":{"rendered":"\u201cQuality Pays Off\u201d"},"content":{"rendered":"

Dieter Frosch\u2019s PV system combines the pioneering spirit of the early 1990s with state-of-the-art technology<\/strong><\/p>\n

Over 20 years ago, Dieter Frosch installed a PV system on his roof. This certainly makes him a solar energy pioneer. And he\u2019s unique in running one of today\u2019s most modern SMA inverters, the Sunny Boy 2.5, alongside one of its oldest inverters, the PV-WR 1800. During a visit to his home, he looks back on the pioneering age of photovoltaics\u2014telling us that he is sometimes surprised himself that his system is still running after all these years, and why he also has old washboards hanging beside the inverters on his walls.<\/p>\n

\u201cMy PV-WR 1800 isn\u2019t working properly anymore. I hope you can help me.\u201d Dieter Frosch from Vellmar said these words as he stood at the SMA reception in June. That\u2019s where, by chance, he met Frank Illian. Straightaway, Frank\u2019s curiosity was piqued. \u201cAs soon as I heard \u2018PV-WR 1800,\u2019 my ears pricked up,\u201d explained Frank. \u201cI was fascinated to discover that there was still one in the field. It\u2019s a real piece of SMA history, and I absolutely had to see it.\u201d<\/p>\n

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\"Starting<\/a>

A reliable energy provider right on the roof: Since 1993, Dieter Frosch\u2019s PV system has produced solar power.<\/p><\/div>\n

1,000 roofs with photovoltaics<\/h5>\n

To be more precise, the PV-WR 1800 is SMA\u2019s first inverter, which started serial production in 1991. Two of these inverters began operating in Mr. Frosch\u2019s PV system with Siemens modules in 1993. The system, with 3.6 kilowatts of power, cost 86,000 German marks (around 45,000 Euros), an almost unimaginably high amount by today\u2019s standards. To date, it has produced over 20,000 kilowatt-hours of solar electricity. Even PV system operator Dieter Frosch can sometimes hardly believe that the system is still running and almost smoothly. \u201cIn the end, quality always pays off!\u201d said Frosch.<\/p>\n

Back then, planning and commissioning was handled by Gerd Hackenberg and his company INES Innovative Energiesysteme GmbH. As fate would have it, Hackenberg is now a Senior Expert in Application Engineering at SMA, and he remembers the installation well: \u201cAt the time, small, decentralized grid-connected PV systems were still extremely rare. Dieter Frosch\u2019s system was one of the first PV systems in Hesse and just made it into the 1,000 Roofs Program.\u201d This meant that he received a 70 percent subsidy, making the investment a lot more bearable. The aim of the federal and state governments\u2019 1,000 Roofs Photovoltaics Program\u2014or \u201c1,000 Roofs Program\u201d for short\u2014was to gather experience and knowledge about the planning, construction and operation of smaller grid-connected PV systems (see info box). It was an initial attempt to implement grid-connected solar energy on a larger scale. Up to that point, it was mostly experienced tinkerers with an interest in technology and committed environmentalists who installed PV systems on their roofs.<\/p>\n

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\"PV-WR_SMASolar\"<\/a>

It\u2019s a real rarity: The PV-WR 1800 inverter was the first series-produced SMA PV inverter and it\u2019s still running at Dieter Frosch\u2019s home.<\/p><\/div>\n

Preserving and passing on knowledge<\/h5>\n

Dieter Frosch, born 1942, is a combination of both. As a qualified electrician, he was always driven by an interest in alternative energies and the idea of \u201cdoing something really useful and sustainable for the environment. Ideally, right on my own doorstep or right behind it.\u201d However, preserving old technologies from the traditional skilled crafts and trades is at least as important to him as his innovative ideas. That\u2019s why he is a passionate collector of old agricultural equipment and tools\u2014flax brakes, spinning wheels, washboards, harnesses for draft animals, clay and stone jars for example\u2014simply to be able to pass on the knowledge of what life was like back then. \u201cOtherwise it will be completely lost to us. What child today still knows what a flax brake is?\u201d Um…I have to admit that I don\u2019t really know either, even though my childhood is far behind me. Of course, Dieter Frosch is ready with the answer: \u201cIt was used to break up the flax and to separate it from the hard woody stems so that later on it was easier to spin and could be made into linen. The material conducts heat much better than cotton. If you wear a linen shirt on hot days like today, you won\u2019t suffer half as much from the heat.\u201d [Author\u2019s note: And it really was extremely hot during the visit to Vellmar.]\n

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\"Talking<\/a>

Talking with Dieter Frosch and Frank Illian about old and innovative technologies<\/p><\/div>\n

Combining tradition and innovation<\/h5>\n

The Frosch single-family home is also a fascinating combination of innovation and tradition. To provide a more solid financial basis for the construction of his house, Dieter Frosch gave up his work as an electrician and swapped it for vocational training in a stable job as a civil servant. Since then, he has spent his free time tinkering and puttering about on his self-built low-energy house. He was particularly interested in the Hofmann voltameter, a forerunner of today\u2019s \u201cpower-to-gas\u201d technology. The electrolytic decomposition of aqueous solutions produces gas, which can in turn be used to generate energy. \u201cI was also very interested in having this for our house, but it wasn\u2019t authorized for use in Germany,\u201d said Frosch. \u201cSo I decided to use photovoltaics and solar heat instead.\u201d The 800-liter thermal store supplies the Frosch family with hot water from March to November. And, for thermodynamic reasons, almost all the windows are south-facing, and the outer walls have been covered by hand with clinker bricks.
\nHowever, the electrician was becoming desperate because he couldn\u2019t fix the fault on the inverter himself. \u201cOne of the inverters was sporadically breaking down every couple of days, otherwise the system was still working perfectly. That I am now getting a brand-new inverter has left me almost lost for words. And that doesn\u2019t happen very often,\u201d he smiled, during the \u201chandover\u201d of the new Sunny Boy 2.5. He was quite surprised at the weight\u2014at just under 10 kilograms, the Sunny Boy 2.5 is only about half as heavy as its \u201cgreat-grandfather,\u201d the PV-WR 1800. Both are now hanging beside each other. \u201cIt\u2019s a wonderful piece of history that you have in your cellar,\u201d said Frank Illian. It\u2019s the history of inverter technology innovation.<\/p>\n

 <\/p>\n

\u201c1,000 Roofs Program\u201d info box<\/strong><\/p>\n

Starting September 1990, the federal and state governments\u2019 1,000 Roofs Program used a set quota to subsidize photovoltaics in Germany.<\/p>\n

The aim was to \u201cevaluate the existing state of the art\u201d and to \u201cdetermine the development still required in low power grid-connected PV systems.\u201d Federal and state governments subsidized 70 percent of the system and installation costs (50 percent by the federal government, 20 percent by state governments). In 1991, the program was also extended to the states of former East Germany. In return, operators agreed to read their energy meters every month for five years and to send the values on a quarterly basis to the Fraunhofer Institute for Solar Energy Systems ISE in Freiburg.<\/p>\n

Grid-connected systems from German manufacturers (even if the modules were manufactured abroad) in a power class of 1 kW to 5\u00a0kW that were installed on roofs of single-family and two-family homes were subsidized. The subsidized systems had to begin operating by 1993 at the latest and had to have a generation meter, feed-in meter and a purchased electricity meter.<\/p><\/blockquote>\n\n\n

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Dieter Frosch\u2019s PV system combines the pioneering spirit of the early 1990s with state-of-the-art technology<\/p>\n","protected":false},"author":20,"featured_media":15213,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[58],"tags":[877],"class_list":["post-15206","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solutions","tag-sunny-boy-en-2"],"acf":[],"yoast_head":"\n\u201cQuality Pays Off\u201d - Sunny. SMA Corporate Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sma-sunny.com\/en\/quality-pays-off\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u201cQuality Pays Off\u201d - Sunny. 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