There are 200 calories in 1 serving of Popeyes Chicken & Biscuits Macaroni & Cheese (Regular). Calorie breakdown: 32% fat, 52% carbs, 16% protein.
The Input Power Factor. A battery powers the inverter. Batteries have an amp-hour rating, the theoretical number of hours that a battery can deliver a current of 20 amps. A fully powered 200-amp-hour battery delivers 20 amps for 10 hours. A lower amp-hour battery will deliver 20 amps for less time.
The fan will be your biggest draw, so look at that and see how many watts it says on the label, then add at least %50. If it says 200w, get a 300w inverter. If it says 500w, get a 750w inverter. Etc. Either way, an average car battery should run your furnace for 20 hours easily.