What’s the difference?
Hydrogen has been touted as a fuel for use in cars and especially fleet trucks for decades. GM had a huge Hydrogen car research program. But the infrastructure to transport and store Hydrogen in meaningful quantities is prohibitedly inefficient and expensive, and the source of hydrogen usually ended up being from natural gas.
But using Hydrogen to store excess energy generation from wind or solar, and reconverted back to electricity when needed is a perfect use of Hydrogen, and the more you scale it up, the more sense it makes. This single home storage solution is probably economically marginal at best, but on the power generation utility scale, it begins to make more sense. It is much more feasible to store excess energy from a wind farm as Hydrogen than in a lithium battery array. And at that scale, it's cheaper, too.
“reconverted back to electricity when needed is a perfect use of Hydrogen”
And it’s acting as a fuel in this reconversion, but I understand you’re talking about as a consumer fuel à la gasoline or propane, not the physico-chemical nature of hydrogen gas.
I'm thinking the same thing from an economic standpoint. Would be interested to see a bigger system for neighborhood generation. I'd be interested in seeing if efficiency got better when you actually scaled up, rather than just adding units.