Calculations

How much energy can you store by sloshing water from ground to roof? 7m to roof of a 2 story house. Take a 500 sf Rosebud. That gets us 100 cubic meters of water on roof in totes stacked 2 high. That is Mgh=100 cu m*7m*1000kg/cu m*10 m/s/s. 7 megajoule. Or 1.94kWhr potential energy! Pending investment in structure - this has sufficient energy!