Toyota eRunner?

[JefAdjut]

Considering the potential integration of solar panels on vehicles, what are your thoughts on the practicality and efficiency of such systems? Additionally, have you experienced or considered any challenges or benefits related to solar panel technology in the automotive context?

 

[TexasFunRunner]

Considering the potential integration of solar panels on vehicles, what are your thoughts on the practicality and efficiency of such systems? Additionally, have you experienced or considered any challenges or benefits related to solar panel technology in the automotive context?

Do you have 74 hours to wait around for each charge?

It's just another gimmick manufactures can charge for. You will never get enough power out of a few hundred square inches of solar cells to come close to matching the power output of a wall charger.

In a best-case scenario, with the solar roof operating at peak efficiency, it'd take around 74 hours of sunlight to fully charge the Prius Prime's battery. If you could somehow guarantee a series of twelve hour days of such conditions, figure on just shy of a week for that "free" recharge.
2023 Prius Prime Solar Roof: How Quickly Does It Charge?

The short answer is it takes anywhere between 5 and 12 solar panels to charge an EV, but it depends on so many factors.
How Many Solar Panels Does It Take To Charge an EV? | Solar.com

It's simple physics:
Best Research-Cell Efficiency Chart | Photovoltaic Research | NREL