If your 12V appliance is running a Merit style plug and you need to extend the reach of the electrical cabling then the 4x4 Equip 6M Extension Cable Merit to Merit Plug is the answer. Manufactured from 6 metres of 4mm insulated wire this product features a female Merit connection on one end and a male Merit/CIG connection on the other. This product has a heavy duty 10Amp capacity.
(Not suitable for portable fridges)