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Photon 2017 05-selection

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SOLARTEG vs Tesla

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Photon 2017 05-selection

  1. 1. www.photon.info InternationalThe Solar Power Magazine Bifacial modules The Chinese company Joly- wood plans to build a 2.1 GW production plant – as a start EMC problems Huawei and Sungrow are facing problems with EMC – and how SMA is trying to benefit from this Dumb »Smart meters«? A Dutch study examining incorrect measurements by electric meters is causing a stir Mapping solar A Swedish company is trying to track worldwide installations with an interactive graphic 5-2017 A two-hill island An innovative concept for solar parks involving vertical installation of bifacial modules
  2. 2. 4 May 2017 bifacial modules 30 China-based solar corporation Jolywood implements a technology once developed by Bosch for potential mass cell production 750 kw-systems 32 Demand for 750 kilowatt arrays has recently soared in Germany. System providers are putting together turnkey packages costing from €750 per kilowatt businessmarkets service 3 editorial 6 in this issue 7 subscriptions 68 conferences & events 76 company directory 79 contacts page 80 publishing, advertisers list 81 10 years ago 82 preview N-type solar cells, developed at Belgium’s IMEC research center: They don’t look any different from p-type cells on the outside, but they have much better efficiency values. Almost invisible: If you look down on the modules from above, they look like dashes in the landscape. The landscape is hardly affected by this type of PV plant. 30 Imec WinfriedBecker/PHOTONPictures 46 installed capacity 8 An interactive map shows the development of the world’s installed solar power capacity since 1992 worldwide 9 Worldwide solar policy, regulatory and market news africa & middle east 10 Solar policy, regulatory and market news across Africa & Middle East asia pacific 14 Solar policy, regulatory and market news across Asia-Pacific region americas 20 Solar policy, regulatory and market news across the Americas 22 SEPA column: Beyond load growth: The EV managed- charging opportunity for utilities europe 26 Solar policy, regulatory and market news in Europe 28 SPE column: So much potential, so many problems
  3. 3. May 2017 5 science & technologyfinance & economics Exchange is mandatory: electronic meters (left) are to completely replace the well-known Ferraris devices (right) in the next few years. Huawei stand at Intersolar Europe 2016: The Chinese manufacturer is the global market leader, ahead of SMA, when it comes to total inverter capacity supplied. Cover 5/2017 28-kilowatt system with vertically mounted modules near Merzig (Saar), Germany Photo Winfried Becker / PHOTON Pictures UdoGeisler/PHOTONPictures JochenSiemer/PHOTONPictures 50 54 system concepts 46 The start-up Next2Sun will be building grid-optimized open-field arrays more ecologically smart meters 50 A Dutch study on errors in digital electricity meter readings unleashes a tumult – and revives memories of a solar inverter problem that was thought resolved. EMC problems 54 EMC problems affected Sungrow and Huawei inverters – and how SMA is trying to use this to its own advantage solar tiles 58 Italian company Solarteg already produces and installs solar tiles without cables intersolar 60 A small selection of interesting new products at this year’s Intersolar Europe R&D news 66 Monthly news on highlights in solar R&D inverter price index 36 Inverter prices until March 31 module price index 38 Module prices until March 31 photon photovoltaic stock index 41 Azure Power replaces Trina Solar 42 Quarterly results
  4. 4. 58 May 2017 science technology | modules | solar tiles In the french cult comic »Asterix«, each epi- sode begins recalling how Julius Caesar, de- spite how many legions he displayed, could not conquer a small Gallic village, visible on the map of the empire only with a hand lense. A magic potion brewed by their Druid Miraculix allows the villagers to resist the Roman legions. To this came the reporter’s memory when last fall, Tesla made a telecast to present world- wide its new »Solar Roof« and few days later, in a much smaller press conference in Milan, the small Italian start-up Solarteg explained that photovoltaic tiles, in fact, already exist in Italy. The expanding empire is Tesla, Julius Caesar is Elon Musk, and the »Solar Roof« could well be his next ambitious campaign, after electric cars, accumulators and company aquisitions. The village of irreducible is in Gallia: not in France but in the Cisalpine Gallia, to be precise in Bernareggio, in the province of Monza. It is a very small start-up called Solarteg, which pro- duces and installs photovoltaic tiles. The role of the druid is covered by Vittorio Canetta, a re- tired engineer with a career in the field of semi- finished products and, apparently, little desire to rest. And the magic potion could be a patent on integrated connectors, filed to safeguard the photovoltaic tile made in Italy. Tesla can wait Solarteg was founded in 2014 by Vittorio Canetta, who is president and partner with, among others, Sergio Brofferio, professor at the Polytechnic University of Milan. Brofferio patented the solar roof tile in 2010 already. Since last March Solarteg produces its mod- els in series in the factory in Bernareggio. The production capacity is 1.2 megawatts a year, 2016 revenue stopped at just 141,000 euro, while that expected for 2017 is 900,000 euro. In management’s forecasts revenue will reach soon three million a year. Currently not more than six workers do the assembly of the cells in the thermosetting resin frames (SMC), but Solarteg followed for now even the direct in- stallation of the first PV plants. The tile is called GTFV100, where »100« means 100 watts of power, and it is composed of two modules of 50 watts each, in turn pro- duced by assembling 12 multicrystalline cells. Considering the overlaps, to install a kilowatt of power takes about eight square meters of sur- face. The available color for now is a red that recalls the terracotta roofing tiles, but there is also a »diamond-like« slate in preparation. So- larteg is preparing certifications according to IEC 61215 and 61730, and the first tests have been overcome Italian company Solarteg already produces and installs solar tiles without cables Text: Leonardo Milla Highlights While the world is waiting for Tesla’s• Solar Roof to be launched, a small Italian start-up already begun produc- ing and installing its solar tiles. These can replace the roof and have• integrated connections which ease the installation process. Shape and color remind of the clas-• sic brick-red and offer a reason to convince local commissions to allow installations in sensible landscape areas or on historical buildings. A roof tiled with Solarteg’s modules: The company is particularly aiming at historical buildings and re- gions with landscape protection rules.
  5. 5. May 2017 59 Connections without cables The concept of the photovoltaic tile is not new at all – an objection that also Tesla was confronted with when the company made a real fuss of its Solar Roof. There are in fact other companies that offer similar products, and even more used to in the past but meanwhile discon- tinued production. Solarteg, however, matches the characteris- tics of form (brick-like) and color (red) of the roof. But the real technical innovation, protect- ed by patents, are the internal connectors inter- locking – »like Lego«, says Canetta – which al- low the modules to connect electrically without cables. A trick that promises to reduce the elec- trical losses and the probability of malfunction due to false contacts as well as problems like attacks from animals. The Tesla solution in this area still remains a mystery: »From the video presentation of Musk I did not understand what the company has developed in the field of tiles connection« says Canetta. What is certain is that connecting single solar tiles of a complete roof using cables will be likely to be a very long and tiring job. And an expensive one. Like all real solar roof tiles presented so far, the Solarteg tiles are integrated in the archi- tectural structure and are capable of replacing the roofing. Passive ventilation is provided by ducts present under the tile floor. The tile is also mouldable and cuttable to follow the profile of the roof, which is particularly important for roofs that have to respect landscape character- istics or are under monumental protection. Solarteg has yet to put in place a proper mar- keting strategy. For now it is aimed primarily at architects and design studios and also offers installers a support in the design activities. The turnkey plants built in Italy in 2016 are still few, the total installed capacity was in order of the tens of kilowatts. The cost for the end user is indicated in about 3.000 Euro per kilowatt for a turnkey system. The market for historical buildings Like all solar tile producers, Solarteg empha- sizes that these costs should not be compared to that of a standard PV system, since the solar tiles in fact replace the roof. Anyway, the price to pay for a roof of photovoltaic tiles is undoubt- ely higher than for a standard plant. Ironically, the very easy assemblage operations – the tiles are fixed with four self-tapping screws – would be the basis of an aversion to the product by the installers. »Actually, our plant can be installed very easily and work is carried out directly by the building company, says Canetta, the electri- cian should intervene only at the end to con- nect the inverter, connect all the network and provide the declaration of conformity.« About the price, he underlines: »the solar roof tile is a highly aesthetic product, those who buy it do not look for only the cost-effective per- formance, but also the pleasure for the eyes.« Moreover, even Elon Musk, presenting its pho- tovoltaic roof, has announced that this will cost something less than the cost of the roof plus the cost of the electricity. Particularly in Solarteg’s home market Italy, it is quite often the pleasure of the eyes and the loveliness of the landscape to curb domes- tic photovoltaic installations in some parts of the country. The institutions of the »Belpaese« (»beautiful country«), as the Italians tend to call their homeland, tend to preserve the landscape and in particular the architecture of historical buildings, or buildings that are located in areas of high landscape value. Although some rules have been softened lately, installing a PV plant on such buildings is not an easy operation as far as red tape is concerned. Here the Solarteg tile offers an advantage, namely the lower impact on the landscape. »Our tile is well regarded by local commit- tees that decide on authorizations« explains Canetta. Despite this, he admits, the adoption of photovoltaic tiles is not in itself a guarantee of approval by the local landscape committees. On the contrary, even in the short history of Solarteg there have been negative decisions by local committees. If the absence of connectors and the lower impact on the landscapes will be enough for the success of Solarteg in the coming years, remains to be seen. For now Canetta plans to extend the company’s area of interest from northern Italy to the rest of the country, with some excursions in southern France, and to forge contacts with architectural firms. Waiting for the landing of the legions of Tesla. By then, the little village of Solarteg will have to be ready for the battle. Further information Contacts page 79 Technical data Cell type multi Rated output 100 W Open-circuit voltage 15.4 V Short circuit current 8.9 A Voltage MPP 11.9 V Current MPP 8.45 A Module efficiency 14.60% Dimensions 712 × 1,090 mm Weight 15.8 kg EDAAC22D@C+A2C6@,2D++++++++ Brevetto N. MI2012A002087 - N. PCT/IB2013/060657 closing plug sealing conductive screw conductor conductor lower tile overlapping upper tile A detail of the integrated connector: the two tiles join like Lego-bricks, the modules are electrically con- nected without cables. This connector is patented. Solarteg- CEO Luca Morganti, President Vittorio Ca- netta and Sergio brofferio, co-inventor of the solar tile at the press conference in Milan, in late October 2016. SolartegSrl(3)
  6. 6. May 2017 79 Much room for further growth p. 8 Greenbyte AB www.greenbyte.com Solar Power Europe www.solarpowereurope.org 2.1 GW to start p. 30 Amtech Systems Inc. www.amtechsystems.com Bosch Group www.bosch.com ECN – Energy research Centre of the Neth- erlands www.ecn.nl IMEC www.imec.be International Solar Energy Research Center Konstanz (ISC Konstanz) www.isc-konstanz.de Jolywood (Suzhou) Sunwatt Co. Ltd / Jolywood (Taizhou) Solar Technology Co. Ltd. www.jolywood.cn RENA Technologies GmbH www.rena.com SolarWorld AG www.solarworld.de Suniva Inc. www.suniva.com Tempress Systems BV www.tempress.nl Yingli Green Energy Holding Co. Ltd. www.yinglisolar.com service | contacts page Not that big, but very interesting p. 32 B.I.E.M. UG www.biem.online REC Group / REC Solar EMEA GmbH www.recgroup.com Schneider Electric GmbH www.schneider-electric.de Solar-Info-Zentrum SIZ GmbH www.s-i-z.de Solarnova Deutschland GmbH www.solarnova.de A two-hill island p. 46 BayWa r.e. renewable energy GmbH www.baywa-re.com Neo Solar Power Corp. (NSP) www.nsp.com Next2Sun GmbH www.next2sun.de SI Module GmbH www.si-module.com Trina Solar Ltd. www.trinasolar.com »The world doesn’t stop at two kilohertz« p. 50 CENELEC (European Committee for Electrotech- nical Standardization) www.cenelec.eu Easymeter GmbH www.easymeter.com EMH Metering GmbH Co. KG www.emh-metering.de Forum Netztechnik/Netzbetrieb (FNN) im VDE Verband der Elektrotechnik Elektronik Informationstechnik www.vde.com/de/fnn Fraunhofer Institute for Wind Energy and En- ergy System Technology (Fraunhofer-Institut für Windenergie und Energiesystemtechnik, IWES) www.iwes.fraunhofer.de Hogeschool van Amsterdam (HvA) www.hva.nl IEEE (Institute of Electrical and Electronics Engineers) www.ieee.org Landis+Gyr AG www.landisgyr.com Physikalisch-Technische Bundesanstalt (PTB) www.ptb.de University of Twente (UT) www.utwente.nl Caught out p. 54 Bureau Veritas’ Consumer Products Services www.bureauveritas.com Federal Network Agency (Bundesnetzagentur) www.bundesnetzagentur.de Fraunhofer Institute for Wind Energy and En- ergy System Technology (Fraunhofer-Institut für Windenergie und Energiesystemtechnik, IWES) www.iwes.fraunhofer.de Huawei Technologies Co. Ltd. www.huawei.com SMA Solar Technology AG www.sma.de Sungrow Power Supply Co. Ltd. www.sungrowpower.com TUV Rhineland (TÜV Rheinland AG) www.tuv.com Tesla can wait p. 58 Polytechnic University of Milan (Politecnico di Milano) www.polimi.it Solarteg Srl www.solarteg.it

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