Hi all, I'm trying to make a battery pack and connect it to a 2000w inverter for my van. My confusion is this, many sites such as THIS state that for a 2000w inverter I need to use 4 AWG wire? I'm in the UK so everything is generally mm2 but not to worry. What I don't understand is this, a typical 4 gang extension cable from the mains can handle 13amp at 240v. This would mean its carrying 3120watts? The cable on this extension cable is 1.25mm2, equivalent to 16awg? Is it really because the wire from the battery pack needs to be far greater as it is sending DC at that point whereas the comparison from the wall is obviously AC?