just to say so far so good with our fleet of over 30 nhw 20r priuses, some have clocked over 600,000 km. no battery issues, in fact the only issues have been those that toyota already recalled. as long as they are correctly maintained they are an excellent vehicle.
It was a bit in code. They are running 30 Gen II vehicles and have added up the annual mileage. One vehicle has 600,000 kilometers LIFETIME.