Hertz is offering renters the option to buy the electric vehicles they are currently renting.Hertz had initially planned to add 100,000 Tesla Model 3s to its fleet by the end of 2021 but has struggled to meet that target.Repair costs for EVs, particularly Teslas, have been higher than expected for Hertz.Hertz's strategy of offering rental customers the option to purchase their rentals is not new and aims to boost awareness and sales.