I use this to make a fridge for my camper out of a small chest freezer. While you work like a champ. I can get an average temp of up to about 35 degrees by drawing a total of about 6 amps DC which is a freezer, inverter and inkbird relay all together powered by 2 6v golf cart batteries connected as 12v and cool down in about 2.45 minutes, so it's only running about 2.5 minutes every 15-20 minutes at about 72 degrees ambient. Based on my quick calculations I should be able to run this freezer at less than 3 amps per hour or around 72 amps for 24 hours at around 70 degrees which is 33% Ah of my battery. I got this idea from YouTube and it's a great setup. The only reason this one doesn't get 5 stars is the directions. It's easy to use once you get the hang of it, but it will take a few minutes to get there as the instructions could be a lot better.