Umm - There is a wee bit of confusion swirling around here regarding Amp-Hrs. Amp-Hrs is the product of the number of Amps times number hrs operating with that current ( so we multiply the two ).
Dividing the two (as proposed below) is incorrect:
"Guys, the original numbers are totals of amps used in the 12 hour period. So 5.4A÷12 hour time frame=.45ah (parasitic loads)
12A÷12 hour time frame=1ah (inverter no load)
29A÷12 hour time frame=2.41ah (fridge on inverter)"
The reason for this is that Amperes are an instantaneous measurement of current flow (ie. Coulombs per second) and you need to multiply by time to get a total amount of charge. Once you multiply again by voltage you get energy (Watt-Seconds, also known as Joules).