Peak Amps and Peak Watts assumes that all loads (and charging sources) are on at the same time. All amp loads are based on 12 volts DC, and inverter efficiency of 90%.
The recommended battery bank size is based on either the Peak Amps (maximum current load) or Amp-Hours per Day (based on 50% max. discharge), whichever requires the larger battery bank. See our article
Battery Bank Sizing for Your Inverter for details about the battery type.
The ABYC Min. is based on running left-column loads (Full-Time Loads and Loads Under Way) without a charging source for 1.5 hours, resulting in COMPLETELY DEAD batteries (Per ABYC E-22.214.171.124.3).
As you can see from experimenting with different loads, the battery type only comes into consideration when the Peak Amps is significant. This is due to the limitations of the various battery types. If the recommended battery bank size seems excessive, it may be due to the Peak Amps. Try unchecking one of the high amp draw items and recalculate.