https://www.techradar.com/news/hyundais-new-electric-car-has-a-solar-panel-roof-and-the-ability-to-charge-other-evs#:~:text=Car%20Tech-,Hyundai‘s%20new%20electric%20car%20has%20a%20solar,and%20can%20charge%20other%20EVs&text=The%20Hyundai%20Ioniq%205%20has,solar%20panels%20on%20its%20roof.
Hyundai says that the solar panels can add up to 2,000km per year (around 5-6km per day) of additional range if it’s driven in sunny environments such as Spain or the south of France.