They were from a fleet of electric vehicles TVA built . . . probably in '78 or '79. I guy I used to work with bought 2 of them to get the transaxles to put in his rail buggies. Because they had been powered by electric motors, they were practically new trannys . . . they had, according to him, been set in either 3rd or 4th gear and the shifter wasn't even hooked up. When I looked at his it had been completely gutted . . . it was pretty straight an solid, but it was basically just a rolling shell. Only the brown/burnt orange paint and TVA logos gave it away as a former electric bus. If I remember correctly, it was either a 78 or 79.
Alan Charles who owned the "Bug Barn" over in Joppa, AL also bought one. I think his was complete except for the batteries. I don't know what ever became of it . . . I've heard that Alan had all of the remaining VWs in his junk yard crushed a couple of months ago.
In addition to the buses there were either 1 or 2 Electric Rabbits in the bunch when they were all sitting in down town Ringgold. I wasn't "into" VWs back in those days, but everytime I went through Ringgold I thought about how cool it would be to have an electric VW Bus . . .