Power Inverters

I have a quick question for the electronics gurus on here .I have a 2001 Dakota with NO heat,I have a 2000/4000 watt inverter that I want to install.My question is can I use 10/2 or 12/2 copper house wire to run from battery into cab to inverter,or do I really need 1/0 or 0/0 welding cable? Thanks in advance.....................................Jeff


by the way it will only be used when engine is running