"Fall" or "Head" is key: how much height and water pressure you have to work with. I'm lucky to have 9 acres of steep valley with 40ft difference between the t

"Fall" or "Head" is key: how much height and water pressure you have to work with. I'm lucky to have 9 acres of steep valley with 40ft difference between the top and bottom, and a lake below me i could use freely. Perfect setup for pumped hydro storage. My run through the numbers (which could well have been wildly mistaken) suggested i might see a maximum of 200 Kwh of power storage. That would have required (wild guess) $200k+ of dirtwork (for which EPA permits and "waters of the United States" issues would've been involved). It would've required $10k? of not common generator and machinery and another several thousand in transporting the power from the foot of the dam to the load. The economics of it made lead-acid batteries look good. double or triple the height available and it might be more appealing.