Tesla owners prove the merit of virtual power plants in Texas. The Hyundai Elantra Hybrid gets recalled over a hybrid-software fault. And the Audi Q8 E-Tron hits 300 miles of range. This and more, here at Green Car Reports. Audi is delivering 300 EPA miles for its Q8 E-Tron, as promised. But as official EPA ratings reveal, that’s for the…