With over 38M [1] households just in Germany that would come to: 19 million metric tons of Al.

Each year the people of this planet mine 160 million metric tons of Bauxite [2]. Not sure how the Bauxite ore related in weight to the final product.

Maybe this could be a viable option for some energy storage?

[1] https://www.statista.com/statistics/464187/households-by-siz...

[2] https://www.aluminum.org/industries/production/bauxite#:~:te....

Aluminium is the 3rd most abundant element in the earth's crust after oxygen and silicon. One of the main constraints on turning that to metal is the electrical power input which is part of the plan here.

Yeah. The current price of aluminum is about $2.00/kg. So, at today's prices, this would cost $1000 per dwelling. That's already pretty high--but maybe not completely infeasible. But then you have to consider what will happen to this price if every household in global north starts buying another 500kg of aluminum.

Most cars weigh more than that, yet here we are