RE:Forget about theoretical specs. Look at real world. Sonic.....I am one of the original investors in Ballard Power (BLD)....big believer too....still holding 3000 shares but realize that it never took flight because BIG AUTO elbowed them out....and of course, ELON would too since they are competition. BLD is into energy storage almost exclusively now. I still remember the Ford commercial of a bathtub in the back of a F150 around 97' and the commercial emphasizing lots of power with an exhaust of JUST WATER......pretty cool....but never got off the ground....Bushes made sure of that