Sol expert kit solar race car racer f1 long life sol expert 40305 this solar f1 racing car from sol expert is a lightning fast solar race car with front headlights which also works in the dark a battery charged by the solar module allows solar racer f1 to reach high speeds and makes light work of slopes during the day the battery recharges with sunlight allowing the car to remain ready at all times the car is supplied as a construction set with battery included sol expert 40305 kit sola