About 7.5 kilowatt hours is needed to charge the Powerwall, providing about 6.5 kilowatt hours of power once charged. With some utilities, consumers can choose between flat-rate electricity pricing (the price is the same no matter the time or day or demand on the electricity grid) and peak-rate pricing.
Myth or Truth: I need 8 glasses of water a day. Myth. The Institute of Medicine says adult men actually need about 13 cups (3 liters) per day of fluid; adult women need about 9 cups (2.2 liters) of fluid. (You get about an additional 2 1/2 cups of fluid from foods.).
This would make sense since 60 percent of the human adult body is made up of water. According to a 2013 Centers for Disease Control and Prevention study, 43 percent of adults drink less than four cups of water a day, 36 percent drink one to three cups, and seven percent drink none at all.