1. Hydrogen will not replace natural gas in homes for a number of reasons, including cost and safety. 2. Energy density increase in batteries IS a weight savings. More energy stored in less mass. 3. Batteries don't lose 20% of their capacity in 2 years. Tesla has packs over 300K miles, of older chemistry, which still had around 90%, and degradation flattens out after that. Newer chemistry does even better. 4. His off handed efficiency calculations comparing fuel cell and batteries is misleading at best. He's close on the vehicle efficiencies but then skews the numbers when talking about the grid to make batteries seem closer to fuel cells than they are. Grid production is irrelevant to the efficiency of the vehicles, be it hydrogen or EV. EV's will always be around 90% efficient and fuel cells around 60%, minus the extra efficiency loss in compressing hydrogen. 5. Different charging protocols are not a barrier, Tesla has adapters in the US and dual ports in China. 6. Tesla can avoid demand charges with Powerpacks and Megapacks at charging stations. Charge off peak at cheap rates, or from solar, and dump charge into vehicles when needed. The batteries can also earn money by doing frequency regulation and demand response if they have extra capacity. 7. The numbers I've seen suggest most semis drive between 300-600 miles a day, which is a single charge over night and a partial charge during a trip for the longer hauls. It's too bad the guests weren't more technically astute and able to challenge the wall of words from Trevor. He's a good salesman for people who don't know better.
