Installing 3000 W inverter – wire size – fuze size

Wire size needs to be determined by distance be batteries and inverter. fuse size will be large somewhere around 250 amp.

Installation manual should give you some specifics on wire size and fuses. Yes, many inverters have cables supplied but many are undersized. Off hand with in ten feet or so you would need 4/0 cable something like welding cable. More strands in cable would be better and more flexible.