With the increasing demand to provide green and efficient energy with an Inexhaustible source like the sun, we decided to get benefit by using the solar panel at the top of the car. Saudi Arabia is considered one of the countries that have hot weather, and that causes lots of problems during office hours, damaging car's accessories and burning of combustible material like batteries. In this work, we propose a coolant system for a car when parking under the sun. The work tries to give a design of the proposed system with a brief description of each part of the project like the solar panel, and the most suitable type for our project, the water radiator that is the future of the AC.