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Wiring diagram for Battery Isolator. Question Not sure what post 1-2-A-and E go to. asked by Mike. 1. Helpful Expert Reply For your battery isolator similar to # DW08771, you will have connection posts for each battery and for an alternator. The main battery will connect to position one and the alternator to the A post. A battery isolator is a one-way electrical battery that allows an electrical current to flow in one direction but not the other. A battery isolator typically is used in situations where multiple batteries are required, and its primary purpose is to ensure that the failure of a single battery will not incapacitate an entire electrical system. The Sure Power model 1202, is a 120 amp, 1 input, 2 output, Multi-Battery Isolator. Specifically designed to exceed OEM Specifications, they are equipped with Solid-State Electronics, which isolate each battery circuit and allows each battery to discharge. Battery Isolators for Multiple Batteries Battery isolators are best seen as the distribution point of an automotive electrical system. Generally built with diodes, isolators ensure that charge is evenly distributed between multiple batteries and the alternator. Battery Isolators eliminate multi-battery drain when two or more battery banks are. Many off-road campers and RVers require a dual battery isolator setup to run their power hungry gadgets like GPS, laptops, smart phones, refrigerators, televisions.. Dual Battery Isolator Setup Protects Your Starting Battery. Over the years, we have killed the starting battery on every vehicle by running our laptops, charging cell phones, and leaving the vehicle's dome light on. Battery isolator # DW08771 will have connection posts for each battery and for an alternator. The main battery will connect to position one and the alternator to the A post. The second battery will attach to the 2 via a circuit breaker that is rated appropriately for the battery. Multi Battery isolator Wiring Diagram. September 3, 2018. July 15, 2018 by Larry A. Wellborn. Assortment of multi battery isolator wiring diagram. A wiring diagram is a simplified conventional photographic representation of an electrical circuit. It shows the elements of the circuit as simplified forms, and the power as well as signal connections between the devices. 1 battery post on isolator. "1 PINK/BLACK 10 AMP CIRCUIT BREAKER IF USED FIRE WALL RED._._. SENSIN6' WIRE ISOLATOR MAIN lOADS AUXILIARY BATTERY WIRE and PLUG KIT ISOLATOR INSTALLATION DIAGRAM FOR DELCO "cs"SERIES ALTERNATOR 10. Cut the old plug wires approxi-mately 6 inches from the plug and strip the harness side wires 3/16" to 1/4" from the. A battery isolator only transfers power from the alternator to a secondary battery. The van’s alternator is designed to keep a float charge (13.8V) on a starter battery as well as provide enough power to keep all of the van’s equipment running, such as lights and a stereo. Battery Isolators may be used with selector switches. Isolators actually enhance battery switch applications because each battery can still be charged independently when the switch is connecting either battery. Typical Isolator with battery switch applications are shown in figures 4 and 5. These diagrams are only two of.