Renewable source power such as solar and wind is so unreliable, 100% conventional power backup is a requirement. Renewables will not be cost viable for H production for decades, if ever.
Originally Posted by Elkins45
The key for H being net energy gain is in using renewable point source power to do the splitting. Basic chemistry tells us it takes as much energy to split the H2 from the O as you get back when you burn it. Using grid power to split the water would be a net energy loss and pollution increase. The only way it makes sense is if you do the electrolysis using solar or wind. Making your own gasoline at home is extremely impractical but a one-time investment in a small individual solar or wind electrolysis plant could be a decent long-term investment for a family. Everybody could be their own H2 producer.
Originally Posted by Danno
Used to run a lot of propane conversion trucks in the 80's. Oil always looked spotless, but valves failed due to not being hardened - oops. Went back to gasoline - too many headaches with propane. Just my experience with gaseous fuels. As for hydrogen, if the cost to extract and support the required infrastructure is higher than the benefit, it won't survive as an option. Unless the government puts their thumb on the scale.