Japan is working on doing for the hydrogen fuel cell what it accomplished with computer chips and cars in the last century, slashing costs to make them more appealing to consumers.

As fuel-cell technology finds its way into factories and commercial buildings, Japanese manufacturers including Panasonic Corp. are working to make them small and cheap enough for the home. The country has set a goal of installing them in 5.3 million homes by 2030, about 10 percent of all households.

http://www.bloomberg.com/news/articles/2014-12-09/japan-promotes-home-fuel-cell-on-path-to-hydrogen-society