Yes, it is possible to put solar panels on cars, especially some popular RV cars with solar panels that are often seen on the road. The solar panels on cars, often referred to as solar panel car roofs or solar car kits, can help harness the power of the sun to charge auxiliary batteries or directly power certain components of the vehicle.

Yes, it is possible to charge an electric car with solar panels. Portable solar panels can generate electricity from the sun and then transfer that power to an electric car's battery through a charging station or an inverter.

However, you should also consider the capacity and efficiency of the portable solar panels, as well as the energy requirements of the electric car. And, it may take a long time to charge it fully if your solar panel for cars is not sufficient enough. To ensure sufficient and fast charging, it may be better to use them with other devices like portable power stations or solar generators together.

The time it takes to charge an electric car with car solar panels depends on various factors such as the size and efficiency of the solar panel, the capacity of the car's battery, and the amount of sunlight available. For example, a 100w solar panel like Anker Solar Panel 625 takes more time than using larger solar panels when charging a Tesla. Generally, it can take several hours to a full day to charge an electric car using solar power.

However, it's important to ensure your solar panels can provide sufficient power to fully charge an electric car in a short time, or combine solar panels with a high-capacity battery or power station.

Solar panels on a car can produce varying amounts of power depending on the size and efficiency of the panels, the amount of sunlight available, and the orientation of the panels. Generally, if you're using one or two 200W Anker 531 solar panels on a car, they can produce around 100 to 300 watts of power per hour for charging auxiliary systems or accessories in the vehicle, such as the battery for powering lights, fans, or small electronic devices.

However, this may not be enough to fully charge the vehicle's main battery or significantly extend its range. For more significant charging needs, it's recommended to use dedicated charging stations or larger solar installations. If you want to store this extra energy for home use, you can connect the system to a solar battery that works with your whole-house generator.

To charge a car battery using solar power, you would typically need a solar panel with a power output of around 10 to 20 watts. However, the exact size of the solar panel needed may vary depending on factors such as the battery capacity, charging requirements, and the amount of sunlight available. At least, it may need 120-watt rated panel to charge your 12V battery within ten hours. And, the 200w Anker 531 solar panel or higher watts models specifically designed for charging car batteries are advised to ensure efficient charging and help maintain the battery's performance and lifespan.