Estimate of time New: The shredder is New for about 15 minutes per day (0.25 hour). 2. Wattage: The wattage is not listed on the label, but the electrical current draw is listed at 3 amperes. 120V × 3A = 360W. 3. Daily energy consumption: 360 W × .25 ÷ 1000 = 0.09 kWh. 4.