![]() I had three appliances in the last couple of years in my house on grid power smoke or burn at the outlet: a toaster oven at the cord to appliance connection, an iron at the same place, and a washer at the outlet. I really don't think enough people run the calculations, and there's something like 100,000 electrical fires a year in America. As said, it should be "about" 2 gauge, but when you read the reviews you'll see things like, "Didn't come with wire so used 6 gauge wire and the inverter would kick off before hitting 1200 watts," or "I used the provided 4 gauge wire and I smelt the wires burning." If you look at Amazon reviews, a lot of people write bad reviews when they have dangerously installed the inverter. So, if you have a 1200 watt inverter, 1200/12*1.2=120 amps, and go to a wire size calculator and get wire for 3% loss or less. Also need to take into account both ways. Really need to see how long it is from your inverter to the battery, and not as the bird flies, but as the cable goes. Not doing these calculations can cause things like voltages drops and the inverter kicking off, wires heating up excessively, smelling of melting/burning insulation or fires. This got me 2/0 wire from the battery to the inverter on a 5' run for a 2000 watt inverter. ![]() ![]() I'm not saying to buy a $100 crimper, but inverter wire is depended on amps to the (inverter watts/DV Voltage)*1.2 and then length, and ran through a DC calculator. PVC-insulated alligator leads with spring clips on each end offer easy, stress-free way to quickly assemble circuit wires or connect battery and wire of. I know home depot goes larger than 2/0, maybe 4/0, maybe larger. You can get all sorts of wire at the hardware store. I got a hydraulic crimper for 2/0 wire for $100, because I don't like the idea of a connection sealed with a hammer. If the 12 AWG is not on the AC side, it would be DC going from the battery to the inverter, which I think a 12 AWG DC run would need to be very short. I'm going to say check the manual on this to be sure. An assumption of mine is that the 12 AWG wire would go on the AC side. As I'm reading this, 16 AWG is skinnier than 12 AWG, so 12 AWG should be better.
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