A new economic viability analysis on Friday revealed that renewable energy along with battery storage in Tamil Nadu is cost competitive with new coal power plants.
The report finds the levelized cost of energy for a hypothetical hybrid, solar, wind and li-ion battery storage system for the state to be Rs 4.97/kWh in 2021, which falls to Rs 3.4/kWh by 2030.
In comparison, cost of electricity produced from new coal power plants in Tamil Nadu is between Rs 4.5-6/kWh.
The hybrid system is designed to cater to 1GW of solar and wind capacity in 2021 with two hours of battery backup, which increases step wise to a four-hour backup by 2030.
The research further highlighted that lithium-based battery storage systems could also help reduce curtailment of renewable energy. Close to 50 per cent of solar power in Tamil Nadu was curtailed since the lockdown in March 2020.
Similarly, its curtailment of wind power in 2019 went up to 3.52hours per day from 1.87 hours per day in 2018.
“Our analysis found that the cost of hybrid RE with battery storage system is at