NTPC Limited announced the signing of a Memorandum of Understanding (MOU) with Energy Vault Holdings, Inc. The objective of the MOU is to collaborate and formalize a long-term strategic partnership for deployment of Energy Vault's EVxTM gravity-based energy storage technology and software solutions based on the outcome of a joint feasibility study. The technology also offers beneficial utilization of coal ash for manufacturing of composite blocks for Energy Vault's gravity-based energy storage system.