>>But it takes a s-load of power to make<<
Not so. This fella was looking for a cure for cancer, his own, then accidently fell into this discovery. Burning the hydrogen from saltwater.
Filling a test tube full of saltwater, he used a radio frequency generator to agitate the molecules within the h2o, releasing hydrogen.
This report was from 2009. The freq. generator uses fairly low power to create an intense +-1500F flame.
Well, the dude died from his cancer. His discovery also died.
https://www.popularmechanics.com/science/a2840/4271398/
“The freq. generator uses fairly low power to create an intense +-1500F flame.”
How much power?