Grid Parity of Residential Building Rooftop Solar PV in India

  • Rakesh Dalal Department of Energy, University of Petroleum and Energy Studies, Dehradun, India
  • Kamal Bansal Department of Energy, University of Petroleum and Energy Studies, Dehradun, India
  • Sapan Thapar Department of Energy and Environment, TERI University, New Delhi, India
Keywords: Grid parity, rooftop solar PV, RETscreen and NPV

Abstract

Rooftop solar photovoltaic(PV) installation in India have increased in last decade because of the flat 40 percent subsidy extended for rooftop solar PV systems (3 kWp and below) by the Indian government under the solar rooftop scheme. From the residential building owner's perspective, solar PV is competitive when it can produce electricity at a cost less than or equal grid electricity price, a condition referred as “grid parity”. For assessing grid parity of 3 kWp and 2 kWp residential solar PV system, 15 states capital and 19 major cities were considered  for the RET screen simulation by using solar isolation, utility grid tariff, system cost and other economic parameters. 3 kWp and 2 kWp rooftop solar PV with and without subsidy scenarios were considered for simulation using RETscreen software. We estimate that without subsidy no state could achieve grid parity for 2kWp rooftop solar PV plant. However with 3 kWp rooftop solar PV plant only 5 states could achieve grid parity without subsidy and with government subsidy number of states increased to 7, yet wide spread parity for residential rooftop solar PV is still not achieved. We find that high installation costs, subsidized utility grid supply to low energy consumer and financing rates are major barriers to grid parity.

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Author Biographies

Rakesh Dalal, Department of Energy, University of Petroleum and Energy Studies, Dehradun, India

Rakesh Dalal is a Ph.D. student at University of Petroleum and Energy Studies (UPES), Dehradun, India since January 2019. He did his Bachelor in Electrical Engineering in 1999 and received M.Tech in Energy systems from Indian Institute of Technology Bombay, India in 2011. He is also a certified energy auditor from Bureau of Energy Efficiency (India) and is currently pursuing a doctorate in Energy systems at UPES, Dehradun. His Ph.D. work centers on Green solution for residential buildings and discusses the harnessing solar PV technology for energy efficient homes.

Kamal Bansal, Department of Energy, University of Petroleum and Energy Studies, Dehradun, India

Kamal Bansal is Director of product design at university of petroleum and energy studies. He is electrical engineer and also BEE certified energy auditor. He has over two decade long experience in the energy sector and area of interest includes project management, renewable energy, energy management and sustainability. He has several research publications to his credit and guided many Phd students for their doctoral degree.

Sapan Thapar, Department of Energy and Environment, TERI University, New Delhi, India

Sapan Thapar is an Associate Professor in the Department of Energy and Environment at the TERI School of Advanced Studies. He has completed his doctoral research as well as Masters from the Indian Institute of Technology, Delhi. Dr Thapar, a certified Energy Manager, has over two decade long experience in the energy sector, with expertise in energy policy, project finance and energy efficiency. He has several research publications to his credit. In the past, Dr Thapar has been associated with IREDA, TERI and Tata Consultancy Services (Energy Division).

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Published
2021-02-15
Section
Articles