your power supply power = 24V x 14.6A = 350.4Watt, normally a AC-DCpower supply has 90% inverting rate, then your acutal power consoumtion of each power supply is: 350/0.9=388Watt.
Your panel total power: 120V x 20A = 2400Watt, and using 80% of your panel is 2400*0.8=1920Watt
1920Watt/388Watt=...