Wouldn’t it be better to have some underground cistern and as water flows down it passes through a turbine? A roof solution will generate a tiny amount of electricity.
If the generator cost $100 to buy and install, it would take nearly a century to pay back its install cost even in one of the rainiest locations in America.
I found the bottom of that page much more interesting.
>> What if you strapped C4 to a boomerang? Could this be an effective weapon, or would it be as stupid as it sounds?
> Aerodynamics aside, I’m curious what tactical advantage you’re expecting to gain by having the high explosive fly back at you if it misses the target.