The issue of global warming which causes the greenhouse effect drives people to replace conventional combustion vehicles to electric vehicles. This reason enhances people to create a better electric vehicle. Developed countries, which generally have four seasons in a year, have conducted many studies on electric vehicles. Whereas developing countries which are generally located in tropics have started to conduct some studies of electric vehicle which are reliable in tropics. In the tropical countries, the characteristic of passenger behaviors while driving a car are influenced by the climates which are warm and humid. Generally, their behaviors are always turning on the air conditioner (ac). In electric vehicle, energy efficiency is the most important consideration. This is due to the lack of energy density of battery that much less than fossil fuel. Energy from the battery should be allocated mainly to the power train have to be shared to run other equipment such as ac. This reason reduces the vehicle mileage. Experimental studies were carried out in two different modes, that are hybrid and battery electric vehicle. Further analysis will determine the most energy efficient and endurance between those two different modes. Toyota plug-in hybrid electric vehicle (phev) was used in this study was carried out on several big and urban cities in various road conditions, such as congested, high ways, residential area and suburb. The performances of electric vehicle were recorded by using a data logger, while the position and the altitude of vehicle were tracked by using gps. The method used in this study was an experiment. Power usage data from either a combustion engine or an electric motor will be recorded in the data logger. The purpose of this study is to find out how the character of hybrid vehicles in tropical areas. This study also provides an overview of the character of electric vehicles in tropical areas. The conclusion is, the character of PHEV power consumption in tropical areas is different (bigger) from in areas with 4 seasons.