23 Research Methodology TechSci Research used its own forecast tool, which is based on the growth of various allied industries in respective regions . TechSci Research also used the impact analysis during short - , medium - and long - term period to estimate the demand and to reach accurate market numbers . It should be noted that the figures compiled are only for the organized market including market share data . The currency used in the report is the United States Dollar (USD), with the market size indicated in USD million . Partial List of Companies Interviewed Key Secondary Sources ▪ Niu International ▪ Yadea Technology Group Co.,Ltd . ▪ Jiangsu Xinri E - Vehicle Co.,Ltd . ▪ Viar Motor Indonesia ▪ Zero Motorcycles, Inc. ▪ Honda Motor Company Ltd. ▪ Deco Green Energy CO. LTD. ▪ Hero Electric Vehicles Pvt. Ltd. ▪ Okinawa Autotech Pvt. Ltd. ▪ Ampere Vehicles Private Limited ▪ World Bank ▪ TechSci Research Proprietary Database & Knowledge Repository ▪ Company Annual Reports ▪ Industry Magazines ▪ Industry Reports ▪ News Dailies ▪ Credible Paid Databases