Any wire chart will show, 10 AWG is safe to use up to 60 amps. It will start to overheat above that. Even less amps if enclosed or pared. Use a 50 amp fuse for 10 AWG. Voltage drop on a conductor is dependent on Wire size, length, and amps. 15 inches of 10 AWG at 100 amps results in just over 2% voltage drop. If starting with exactly 12 volts you get less than 11 3/4 volts at the end. More volts in, more lost volts out. Bad news for a charging system or a high power draw as an inverter.
Back to the OP, I use a Sine Wave inverter. 2000W by Samlex. 2/0, that is 00, cable from battery bank 24 inches to inverter. With a 250 amp fuse at the battery positive. Having my microwave was very important for medical reasons. If having a microwave, then may as well have a large enough one, so 1000W. If having a 2000w inverter, may as well have a Mr Coffee. If having 120 volt coffee maker, may as well have a toaster. No bad reports about my set up. I did have a bad experience using a MSW for a window fan during a power failure. Lots of smoke. There are square wave inverters labeled as modified wave. My guess is the cheapest are the worse. My cautionary is; Always use larger wires with low voltage direct current. Look them up on any of the wire size tables throughout the internet.
