7 hr charge at 240 volts. about 20 hours at 110/120V
A 220 volt circuit at 30 amps will charge these batteries at 6.6 kilowatt-hours per hour for 7 hours. A 5600 watt dryer uses 5.6 kilowatt-hours. So, if you run the equivalent of a dryer for 7 hours each night, will one be charged a night time rate? Nope! Electrical rates will go up as more batteries are charged. And those home owners heating their homes on those cold winter nights will be paying to the nose because we have people living in a fantasy world on an unicorn farm.