Adding extra capacity to a car's electrical system to run air conditioning (AC) while parked under direct sunlight for an extended period, such as overnight, is not a straightforward task and may not be feasible in most cases. The car's electrical system is designed to handle specific loads, and modifying it without proper engineering and expertise can lead to safety and performance issues. Additionally, running the AC for an extended period while the car is parked can drain the battery significantly, potentially leading to a dead battery and other problems.
That said, there are a few things you can consider to help mitigate the heat and improve the comfort level when entering a hot car:
Sunshades: Use sunshades or reflective window covers to block direct sunlight from entering the car. This can help reduce the temperature inside the cabin.
Ventilation: Before parking your car, roll down the windows slightly to allow some ventilation. Be cautious about security and weather conditions before doing this.
Remote Start: Some cars have remote start systems that allow you to start the engine and activate the AC from a distance. This can help cool down the interior before you enter the car.
Solar-Powered Ventilation Fans: There are solar-powered ventilation fans designed for cars that can help keep the interior cooler by continuously circulating the air.
Park in Shaded Areas: Whenever possible, park in shaded areas to reduce the direct exposure to sunlight.
Tinted Windows: Consider having your car's windows tinted, as this can help reduce the amount of heat entering the cabin.
If you find that your current AC system is not cooling the car efficiently, it may be a sign of an issue with the AC system itself. In such cases, it's best to have a qualified automotive technician inspect and service the AC system to ensure it is running optimally.
Remember, attempting to modify the car's electrical system without proper knowledge and expertise can be dangerous and may void your car's warranty. Always consult with a professional mechanic or automotive electrician before making any modifications to your vehicle's electrical system.