Energy serves as a vital catalyst for economic development and enhancing quality of life. The Earth is endowed with abundant energy resources, classified as both conventional and non-conventional, to meet the demands of electricity generation and consumption. As conventional energy sources rapidly deplete on a global scale, the imperative to prioritize renewable energy has become evident as a sustainable solution for the escalating global electricity demands.
A pivotal avenue for achieving sustainable growth lies in the generation of electricity through solar energy, known for its cleanliness and promise. Solar energy stands out as having the greatest potential among renewable sources. The energy Earth receives, as evaluated by IPCC, theoretically could meet current needs if even a small fraction of this formidable resource is harnessed. In simpler terms, utilizing just 5% of this energy could provide 50 times the world’s current requirements.
Direct solar energy is considered to be the most potent, offering versatile applications. India emerges as a leading nation with abundant Direct Normal Irradiance (DNI), influenced by factors such as geographic location, Earth-sun movement, tilt of the Earth’s rotational axis, and atmospheric conditions. The estimated potential for solar energy in India is staggering, reaching about 5000 trillion kWh per year. Solar radiation incident over India ranges from 4–7 kWh per square meter per day, with an annual radiation between 1200–2300 kWh per square meter. The country experiences an average of 250–300 clear sunny days and 2300–3200 hours of sunshine per year.
Technologies for converting solar radiation into heat and electricity, namely solar thermal and solar photovoltaic, hold great promise and scalability for India.
The status of India, along with its leading federal state, is also presented. Ocean Thermal and Wave Energy are in the demonstration phase, yet to achieve significant commercial breakthroughs.
The Government of India initiated the Jawaharlal Nehru National Solar Mission (JNNSM) on January 11, 2010, as part of its comprehensive National Action Plan on Climate Change (NAPCC–2008). The mission envisions installing 22,000 MW through grid-connected and off-grid power plants. By April 2014, India achieved a total installed capacity exceeding 2.2 GW through grid-connected solar power plants, with a substantial contribution from solar PV power plants. However, progress in grid-connected solar thermal technology has been limited, with only 55 MW installed. A recent milestone includes the commissioning of a 50 MW project through grid-connected solar thermal technology, bringing the total to a modest 55 MW. Additionally, 140 MW has been generated through off-grid PV systems. This 50 MW solar thermal plant is among the few successfully commissioned against the total allocated capacity of 470 MW in December 2010.
These recent developments serve as a catalyst for the authors to delve into a comprehensive discussion on the evolution of solar energy in India since Independence. The aim is to provide valuable insights into the challenges, progress, and potential solutions that have shaped India’s trajectory toward harnessing solar energy for sustainable development.
Five-Year Plans (FYPs) serve as comprehensive national economic roadmaps, shaping the foundational strategies for a country’s economic growth. Historically, the Planning Commission has played a pivotal role in the development, execution, and monitoring of FYPs in India . The inception of India’s national planning journey dates back to 1951, marked by the release of the first 5-year plan under the leadership of Prime Minister Jawaharlal Nehru . As of now, India has completed the 11th FYP (2007–2012) and embarked on the initial phase of the 12th FYP (2013–2017).
Historical Milestones: The genesis of India’s economic planning can be traced to the foresight of Prime Minister Nehru, who recognized the imperative for a systematic approach to national development. The launch of the inaugural 5-year plan in 1951 was a seminal moment, laying the groundwork for addressing pressing economic challenges and steering the nation towards sustainable growth.
Evolution of Five-Year Plans: Over the ensuing decades, India has witnessed the evolution of FYPs, adapting them to changing economic landscapes and developmental priorities. The Planning Commission’s central role in crafting these plans reflects a commitment to aligningnational aspirations with tangible strategies. The conclusion of the 11th FYP in 2012 marked a juncture, leading to the initiation of the 12th FYP in 2013.
Transition to the 12th FYP: As India entered the first year of the 12th FYP (2013–2017), the nation grappled with new economic dynamics, reflecting the continual evolution of its developmental agenda. The formulation of the 12th FYP underscored a commitment to flexibility, incorporating lessons from past plans to address contemporary socio-economic challenges.
Role of NITI Aayog: In 2014, with the dissolution of the Planning Commission, NITI Aayog assumed the mantle of guiding India’s economic policies. This paradigm shift marked a departure from traditional planning methodologies, emphasizing collaborative federalism, innovation, and adaptability to cater to the diverse needs of India’s states and union territories.
Conclusion: The trajectory of India’s Five-Year Plans encapsulates a narrative of strategic foresight, adaptability, and resilience in navigating the evolving economic landscape. As the country forges ahead into the 12th FYP, the focus remains on inclusive and sustainable development, reflecting India’s unwavering commitment to realizing economic prosperity for all.
The Indian government’s strategic move to boost semiconductor fabrication and solar photovoltaic cell manufacturing is reflected in the comprehensive policy announced at the national level. Karnataka, as a pioneer, seized the early mover advantage by unveiling its Semiconductor Policy in 2010, with a dedicated focus on the entire solar energy value chain. This policy set the stage for subsequent state-specific solar initiatives, with Gujarat taking the lead in 2009, paving the way for a total of 14 states adopting solar policies.
Challenges and Historical Context: Despite various post-independence initiatives, solar energy’s impactful integration in India gained momentum only after 2009, marked by specific solar policies at both national and state levels. A review of five-year plans since 1950 reveals the marginal impact of earlier programs. The current solar energy capacity in India stands at approximately 2.2 GW.
Future Directions : Addressing barriers and challenges identified in the review, the authors propose innovative initiatives for India’s solar future. These include the introduction of innovative financing mechanisms, such as the implementation of Solar Bonds, to incentivize investments in the solar sector. Additionally, the authors recommend the enforcement of Renewable Purchase Obligations (RPOs) through robust guidelines to strengthen the implementation of these obligations.
The development of the solar sector in India has evolved from a societal obligation to a robust socio-economic growth opportunity. While progress is evident, the sustainability of this growth requires ongoing supportive policies. As solar becomes a lucrative business proposition for investors, its continued contributions to economic development are poised to reshape India’s energy landscape.