Renewable Energy and Energy Efficiency

It is true that investors look to create wealth from their investments, and in the recent past, companies that created value for shareholders at any cost, in terms of share prices and dividends, were in prominence.

However, the trend is slowly changing and investors have started to look at companies that do well on the environmental, social, and governance (ESG) criteria. Companies that are environmentally benign, create social value, and are backed by robust governance mechanisms are in demand. Investors are now envisaging a future where ESG criteria play a major role.

The performance of an electric vehicle (EV) is largely dependent on a battery and its materials composition. Battery selection is based on performance characteristics, such as energy and power density, life cycle, safety, charging/discharging rate, cost, etc. Currently, the market is dominated by Lithium-ion batteries (LiBs). The most prominent material compositions in LiBs are Lithium Nickel Manganese Cobalt (LNMC), Lithium Nickel Manganese Oxide (LNMO), and Lithium Iron Phosphate (LFP) as cathode materials and graphite as anode material.

India has set an ambitious rooftop solar photovoltaic target of 40 GW by 2021-22. However, with only approximately 6.8 GW installed till date, it looks increasingly difficult to reach the target in less than a year. One of the primary deterrents is the reluctance of distribution companies (discoms) to promote the rooftop solar segment. The finances of most discoms are in a beleaguered state. This is due to free power for agriculture, unmitigated aggregate technical and commercial losses, and failing cross-subsidy regimes.

India has set some ambitious renewable energy (RE) targets for itself — 175 GW by 2022 and 450 GW by 2030.

India’s power sector has been witnessing a large share of renewable energy (RE) being integrated into the grid. This is expected to grow at a high pace in the future as well. With increasing RE share, storage, especially pumped-hydro energy storage (PHES), plays a key role in dispatching the energy from RE resources, peak load shaving, frequency regulation, voltage support, providing round-the-clock support, and balancing the grid, among others.

India, which is the second-largest coal producer and both the third-largest producer and consumer of electricity in the world, has committed to an RE-dominant future with an ambitious target of 450 GW of RE capacity by 2030. With the global push for clean energy and falling RE costs, there is no backing away from this goal now. Given this, what is the contribution that state generating companies (GENCOs), mainly operating thermal capacity, can make for this transition to be successful?

Existing pumped-hydro-energy storage (PHES) plants in India are inadequately utilised and hence have low economic benefits. With high renewable energy (RE) penetration expected in the coming years, energy storage systems will gain prominence. One of the most economical, available, mature, and bulk energy storage mechanisms is PHES. However, PHES plants are capital-intensive and topographically dependent.

The draft NEP, besides recognising the significance of RE hybrids (like solar-biomass, solar-hydro) for sustainable generation, highlights the role of DRE in reducing dependency on the transmission network, especially through solar rooftops in urban spaces and mini-grids in remote villages.

However, large-scale deployment of DRE systems will throw up issues related to intermittency, voltage instabilities, variable RE (VRE) curtailments, and network management.