NEW DELHI, June 17 -- India plans to introduce standardized energy-efficiency labelling for electric two-wheelers (e2Ws) to help lower charging costs and enable consumers to make informed choices, according to four people aware of the development.

The labelling is expected to operate on the lines of the one-to-five-star rating system for electrical appliances by the state-run Bureau of Energy Efficiency (BEE) under the Union power ministry, the people said, speaking on condition of anonymity because discussions on the plan are in the initial stages and not in the public domain. A higher rating means greater energy efficiency, resulting in lower electricity bills and a smaller carbon footprint.

"There was a meeting last week between BEE,...