. [ the kWh instruction / explaination ( for electricity bill$ ) ok ] ... . basic/simple - 1000 watts on for an hour = 1 kWh ( 1 kiloWattHOUR ) . . . . . . $0 so for example playing a 500watt playstation 4 for 6 hours = 6 x 500watts = 3 kWh !!! ( NOT TO MENTION THE POWER WATTAGE THE TV SCREEN / MONITOR IS JUICE-ING AS WELL ! !!! !!!!!!! . that should be enough information......