Things you should understand about inverters:
Often an inverter is rated for peak output, not sustained output, so an 800w inverter is really a a 600w inverter that can put out a higher rush of 110VAC
800w will require approximately 60+ amps supply on the 12VDC supply, and it will provide about 6 amps of 110VAC ( Volts times Amps equals Watts, minus about ten to fifteen percent inefficiency). There's some loss of efficiency to anything that is added to the system, so even at an 800w output, it might not run an microwave rated at 800w.
A 20 ft run ( 10 ft from the inverter to the battery and back) would call for 4 or 6 gauge wire, which is a bit big and awkward for hiding in a car's interior.
A battery's AH rating represents to total output of Amps times Hours the battery is capable of, but only about 50% of that rating is actually usable without killing the battery permanently.
An alternator's rating is based on it's maximum output, usually achieved when the engine is running at about 1800rpm- at idle, the output can be considerably less.
110VAC suffers from a lot less voltage loss over distance. My approach would be to mount an wire the inverter as close to the battery as you could, and run an extension cord to where you want to plug in.
Often an inverter is rated for peak output, not sustained output, so an 800w inverter is really a a 600w inverter that can put out a higher rush of 110VAC
800w will require approximately 60+ amps supply on the 12VDC supply, and it will provide about 6 amps of 110VAC ( Volts times Amps equals Watts, minus about ten to fifteen percent inefficiency). There's some loss of efficiency to anything that is added to the system, so even at an 800w output, it might not run an microwave rated at 800w.
A 20 ft run ( 10 ft from the inverter to the battery and back) would call for 4 or 6 gauge wire, which is a bit big and awkward for hiding in a car's interior.
A battery's AH rating represents to total output of Amps times Hours the battery is capable of, but only about 50% of that rating is actually usable without killing the battery permanently.
An alternator's rating is based on it's maximum output, usually achieved when the engine is running at about 1800rpm- at idle, the output can be considerably less.
110VAC suffers from a lot less voltage loss over distance. My approach would be to mount an wire the inverter as close to the battery as you could, and run an extension cord to where you want to plug in.
