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.).
The typical U.S. adult downs about four cups a day, which is shy of the Institute of Medicine's recommendation to drink about three liters of fluid for men and 2.2 liters for women. But others disagree with this assessment -- if that's the amount of water a person naturally drinks in response to thirst, that's fine.