The Recent Change in the Italian Policies for Photovoltaics: Effects on the Energy Demand Coverage of Grid-Connected PV Systems Installed in Urban Contexts

In July 2013, the Italian photovoltaic (PV) support policies changed the feed-in tariff (FIT) mechanism and turned to a tax credits program, which is currently in force. The aim of this paper is to investigate how such a radical change has influenced the electricity demand coverage of the PV systems installed in urban contexts. A methodology, which connects the economic assessment to a detailed architectural and energy suitability analysis, was applied to some case studies to analyse the relationships between the physical parameters related to multi-storey buildings (roof shapes, number of floors and area of flats) and the most relevant economic and financial features affecting the viability of rooftop PV systems. The study, which considers only the electricity produced by the PV systems that are economically profitable, highlighted that the tax credits scheme is even more effective in covering the electrical consumption of densely urbanised Italian city districts. The results, which are significantly influenced by the latitude of the analysed districts, underline the opportunity for governments to adopt PV promoting policies that are more sensitive to the amount of solar energy available in the different regions of their national territory.

[1]  D. L. Talavera,et al.  Grid parity and self-consumption with photovoltaic systems under the present regulatory framework in Spain: The case of the University of Jaén Campus , 2014 .

[2]  Agis M. Papadopoulos,et al.  An assessment of the Greek incentives scheme for photovoltaics , 2009 .

[3]  Bradley S. Neish,et al.  Methodology for estimating solar potential on multiple building rooftops for photovoltaic systems , 2013 .

[4]  A. Orioli,et al.  The recent change in the Italian policies for photovoltaics: Effects on the payback period and levelized cost of electricity of grid-connected photovoltaic systems installed in urban contexts , 2015 .

[5]  Alessandra Di Gangi,et al.  Effects of the Italian financial crisis on the photovoltaic dissemination in a southern city , 2013 .

[6]  Ralph Horne,et al.  Regulatory potential for increasing small scale grid connected photovoltaic (PV) deployment in Australia , 2011 .

[7]  Andreas Poullikkas,et al.  Parametric cost-benefit analysis for the installation of photovoltaic parks in the island of Cyprus , 2009 .

[8]  G. Meron,et al.  An energy-based evaluation of the matching possibilities of very large photovoltaic plants to the electricity grid: Israel as a case study , 2010 .

[9]  G. Meron,et al.  Appropriate storage for high-penetration grid-connected photovoltaic plants , 2012 .

[10]  Jasper Rigter,et al.  Cost and optimal feed-in tariff for small scale photovoltaic systems in China , 2010 .

[11]  Ricardo Rüther,et al.  The potential of building-integrated (BIPV) and building-applied photovoltaics (BAPV) in single-family, urban residences at low latitudes in Brazil , 2012 .

[12]  Douglas T. Reindl,et al.  Assessment of high penetration of solar photovoltaics in Wisconsin , 2010 .

[13]  Yosoon Choi,et al.  PV Analyst: Coupling ArcGIS with TRNSYS to assess distributed photovoltaic potential in urban areas , 2011 .

[14]  Pietro Asinari,et al.  Scalable methodology for the photovoltaic solar energy potential assessment based on available roof surface area: Further improvements by ortho-image analysis and application to Turin (Italy) , 2011 .

[15]  Z. A. Latif,et al.  GIS-based estimation of rooftop solar photovoltaic potential using LiDAR , 2012, 2012 IEEE 8th International Colloquium on Signal Processing and its Applications.

[16]  Mohammed H. Albadi,et al.  Economic perspective of PV electricity in Oman , 2011 .

[17]  Peter Lund,et al.  Options for improving the load matching capability of distributed photovoltaics: Methodology and application to high-latitude data , 2009 .

[18]  Luigi Dusonchet,et al.  Economic analysis of different supporting policies for the production of electrical energy by solar photovoltaics in western European Union countries , 2010 .

[19]  Gaetano Zizzo,et al.  Critical assessment of support for the evolution of photovoltaics and feed-in tariff(s) in Italy , 2015 .

[20]  J. Driesen,et al.  Grid impact indicators for active building simulation , 2011, ISGT 2011.

[21]  W. Short,et al.  A manual for the economic evaluation of energy efficiency and renewable energy technologies , 1995 .

[22]  Dirk Saelens,et al.  The impact of domestic load profiles on the grid-interaction of building integrated photovoltaic (BIPV) systems in extremely low-energy dwellings , 2010 .

[23]  Yoshihiro Yamamoto,et al.  Pricing electricity from residential photovoltaic systems: A comparison of feed-in tariffs, net metering, and net purchase and sale , 2012 .

[24]  Alessandra Di Gangi,et al.  Review of the energy and economic parameters involved in the effectiveness of grid-connected PV systems installed in multi-storey buildings , 2014 .

[25]  Miguel P. Amado,et al.  Solar urban planning: a parametric approach , 2014 .

[26]  John Edward Burns,et al.  Comparative economic analysis of supporting policies for residential solar PV in the United States: Solar Renewable Energy Credit (SREC) potential , 2012 .

[27]  S. Kurtz,et al.  Outdoor PV degradation comparison , 2010, 2010 35th IEEE Photovoltaic Specialists Conference.

[28]  E. Telaretti,et al.  An analysis of feed’in tariffs for solar PV in six representative countries of the European Union , 2014 .

[29]  Miguel P. Amado,et al.  Towards Solar Urban Planning: A New Step for Better Energy Performance , 2012 .

[30]  Sérgio Freire,et al.  Applications of solar mapping in the urban environment , 2014 .

[31]  J. Kaňuk,et al.  Assessment of photovoltaic potential in urban areas using open-source solar radiation tools , 2009 .

[32]  Hugh Outhred,et al.  Study of grid‐connect photovoltaic systems: benefits, opportunities and strategies , 2009 .

[33]  Paul Denholm,et al.  Evaluating the limits of solar photovoltaics (PV) in electric power systems utilizing energy storage and other enabling technologies , 2007 .

[34]  Samir Bensaid,et al.  Assessing the solar potential of roofs in Valparaíso (Chile) , 2014 .

[35]  Maurizio Cellura,et al.  Photovoltaic electricity scenario analysis in urban contests: An Italian case study , 2012 .

[36]  R. Vardimon.  Assessment of the potential for distributed photovoltaic electricity production in Israel , 2011 .

[37]  Vijay Modi,et al.  Penetration of solar power without storage , 2009 .

[38]  S. Lüthi.  Effective deployment of photovoltaics in the Mediterranean countries: Balancing policy risk and return , 2010 .

[39]  E. Peroni.  Il procedimento sanzionatorio dell'Autorità per l'energia elettrica, il gas ed il sistema idrico (Aeegsi) , 2013 .

[40]  José L. Bernal-Agustín,et al.  Photovoltaic remuneration policies in the European Union , 2013 .

[41]  Joshua M. Pearce,et al.  A Review of Solar Photovoltaic Levelized Cost of Electricity , 2011 .

[42]  Rhythm Singh,et al.  Estimation of roof-top photovoltaic potential using satellite imagery and GIS , 2013, 2013 IEEE 39th Photovoltaic Specialists Conference (PVSC).

[43]  G. Meron,et al.  The effects on grid matching and ramping requirements, of single and distributed PV systems employing various fixed and sun-tracking technologies , 2010 .

[44]  Ali Naci Celik,et al.  Present status of photovoltaic energy in Turkey and life cycle techno-economic analysis of a grid-connected photovoltaic-house , 2006 .

[45]  Karsten Voss,et al.  Load Matching and Grid Interaction of Net Zero Energy Buildings , 2010 .

[46]  Amol Phadke,et al.  Changing Sunshine: Analyzing the dynamics of solar electricity policies in the global context , 2012 .

[47]  Alessandra Di Gangi,et al.  Load mismatch of grid-connected photovoltaic systems: Review of the effects and analysis in an urban context , 2013 .

[48]  C. Osterwald,et al.  Degradation analysis of weathered crystalline-silicon PV modules , 2002, Conference Record of the Twenty-Ninth IEEE Photovoltaic Specialists Conference, 2002..

[49]  T. Santos,et al.  Photovoltaic potential in a Lisbon suburb using LiDAR data , 2012 .

[50]  Gaetano Zizzo,et al.  Comparative analysis of different supporting measures for the production of electrical energy by solar PV and Wind systems: Four representative European cases , 2009 .

[51]  Dirk C. Jordan,et al.  Photovoltaic Degradation Rates—an Analytical Review , 2012 .

[52]  M. Brito,et al.  Solar energy potential on roofs and facades in an urban landscape , 2013 .

[53]  Harald Schwarz,et al.  Urban photovoltaic potential , 2010, 2010 9th International Conference on Environment and Electrical Engineering.

[54]  S. Borenstein.  The Long-Run Efficiency of Real-Time Electricity Pricing , 2005 .

[55]  P. Denholm,et al.  Evaluating the Limits of Solar Photovoltaics (PV) in Traditional Electric Power Systems , 2007 .

[56]  Svetoslav Danchev,et al.  Returns on investment in electricity producing photovoltaic systems under de-escalating feed-in tariffs: The case of Greece , 2010 .

[57]  F. Z. Zerhouni,et al.  Optimum Load Matching by an Array Reconfiguration in Photovoltaic Generators , 2010 .

[58]  Ahmad Zahedi.  Development of an economical model to determine an appropriate feed-in tariff for grid-connected solar PV electricity in all states of Australia , 2009 .

[59]  Jacques Teller,et al.  A method to evaluate the adaptability of photovoltaic energy on urban facades , 2014 .

[60]  Detlev Heinemann,et al.  Regional PV power prediction for improved grid integration , 2011 .

[61]  Volker Coors,et al.  Large scale integration of photovoltaics in cities , 2012 .

[62]  Uroš Stritih,et al.  Review of green electricity production in Slovenia , 2007 .

[63]  H. Solangib,et al.  A review on global solar energy policy , 2011 .

[64]  F. Dinçer,et al.  The analysis on photovoltaic electricity generation status, potential and policies of the leading countries in solar energy , 2011 .

[65]  Jukka Paatero,et al.  Effects of Large-Scale Photovoltaic Power Integration on Electricity Distribution Networks , 2007, Renewable Energy.

[66]  T. A. Smith,et al.  Potential for rooftop photovoltaics in Tokyo to replace nuclear capacity , 2013 .

[67]  John K. Kaldellis,et al.  Potential of building integrated photovoltaic systems (BIPV): study on the Oinofyta Viotias industrial buildings zone , 2012 .

[68]  Y. Gagnon,et al.  An analysis of feed-in tariff remuneration models: Implications for renewable energy investment , 2010 .