Dehumidifiers use a higher amperage (wattage) momentarily at the time of compressor start-up than while they are running. 

The chart below lists the Start Up and Running amps and watts:

  

 Model Wattage Max Amp Draw Running Amp Draw
30 pint  450  9.6  4.2
32 pint  340  12.8  5.6
45 pint  480  9.6  4.2
50 pint  550  10.8  4.7
65 pint  690  14.2  6.2
70 pint  727  17.25  7.5