I know that these 12v coolers are less efficient than the 12v refrigerator freezers, but they are also less expensive, and lighter in weight, both of which are important to me. I am looking at this machine, which draws 48 watts (or 4 amps, if A=W/V). I have a countertop ice maker that uses 110 watts AC. I thought I would run the cooler for 10-12 hours during the day (using 40-48 ah, yes?) then run the ice maker for an hour and dump the ice into the cooler for overnight chilling. My Solar panel is 150 watts, my group 29 batteries are each rated for 12Oah and I have a 1000 (2000) surge watt inverter. Even though I have a total of 240 ah, I understand that I never want to drain them completely, so I am guestimating that I have 200 ah to work with, exluding solar replenishment. Since the icemaker is on AC, what is the number I should use in the A=W/V equation? I am trying to figure out what other small household appliances I might also be able to run and for how long. Any help from those with actual experience or knowledge would be most welcome. Thank you.