The Mazda CX-9 PHEV makes the safety honor roll. Honda, BMW, and Ford get together for looking at how EVs could connect to the grid. And we go hands-on with how the Kia EV9 will help back up the home and smooth the grid. This and more, here at Green Car Reports. The upcoming Kia EV9 is noteworthy for many reasons, and one of them is the way the…