Rupert on Nostr: nprofile1q…hs06p My mother in law had a 200kg propane tank at her house. It's ...

nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpq6uk4yyw47haxwl0klhh7lcx3qatkyqmpc6gc4hwru3qedaeuueequhs06p (nprofile…s06p) My mother in law had a 200kg propane tank at her house. It's attractive to think of running rooftop solar to crack water and store hydrogen in it instead. Much more ecologically friendly than a battery full of rare elements from conflict zones. Until you work out that the energy density of hydrogen is about 10kJ/kg, and that massive tank is sitting there embrittling while storing (assuming a very efficient fuel cell at 60%) less than 0.4kWh.