The best metric is %-wt of hydrogen. Compressed hydrogen tanks go from 4.5-7% hydrogen by weight. I've read state-of-the-art vessels can get as high as 10%. Liq

The best metric is %-wt of hydrogen. Compressed hydrogen tanks go from 4.5-7% hydrogen by weight. I've read state-of-the-art vessels can get as high as 10%. Liquid ammonia is 17% hydrogen by weight, so as long as the tanks don't erode this too much, you're still doing better than compressed H2.