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Put a fuse between the battery & the regulator, as close to the battery as possible. It's purpose is to protect the wiring from getting too hot & causing a fire in the event of a short circuit. It's rating needs to be higher than the regulator's output so a 25 amp or 30 amp one will suffice in your case. Best not to use a standard auto blade type fuse, (they can become a fire hazard themselves over time when used in this type of situation). A manual resettable circuit breaker is a good idea as it allows for disconnecting the panels too. Auto reset fuses/circuit breakers are a lousy idea as I found out recently. They can make fault finding far more difficult than it needs to be.
Last edited by Cuppa; 25th February 2018 at 07:25 PM.
2006 4.2TDi ex-Telstra Remote area Camper. Patrol Sold after 11 years of ownership Replaced with 2006 OKA NT Expedition Truck. Cummins, Allison & lots of goodies A Nomadic Life (Blog)