When battery isolators are used in conjunction with selector switches, it is not necessary to change the switch position to provide for charging of both batteries. Both batteries are always being charged automatically, in proportion, to their needs whenever the engine is running. Includes Exciter Terminal INBOARD AND OUTBOARD BATTERY ISOLATORS are solid-state devices which allow electrical current to flow in one direction ONLY, thus permitting the alternator to be connected directly to two batteries without fear of one higher charged battery discharging into the lower charged battery. NOTE: Battery Isolators cannot be used on 12 volt charging systems 2ith 24 volt trolling motors or newer outboard engines with rectifier-regulator charging systems. Interchange: Sierra īI-1202-3A Battery Isolator Rated for use with 10 to 350 amp alternators on 12, 24, or 32 volt negative ground systems. Isolators provide proportioning of the output or charging current on the alternator to the batteries as required, regardless of switch position. 70 Amp max INBOARD AND OUTBOARD BATTERY ISOLATORS are solid-state devices which allow electrical current to flow in one direction ONLY, thus permitting the alternator to be connected directly to two batteries without fear of one higher charged battery discharging into the lower charged battery.
#Battery isolator relay ac delco manual#
I've tried to illustrate this in the chicken scratch drawing attached to the post - the upper battery being the main battery, the lower battery the auxiliary, the left relay being the heavy-duty isolator, the left switch being a manual override, the right switch representing the ignition-controlled circuits that also provide power to other circuit devices, and the heavily scribbled line showing the effect of closing the manual override switch energizing the trigger post of the heavy-duty isolator, and also energizing the line connecting the isolator to one of the secondary posts of the smaller relay, but not continuing on to the 'other circuits' connected to the ignition-switched circuit.BI-0702 Battery Isolator Rated for use with 10 to 350 amp alternators on 12, 24, or 32 volt negative ground systems. This would allow me to wire a second manual switch in parallel to the smaller relay, which when closed would not energize the other devices on the 12v vehicle running circuit. What I thought would solve this problem was to use a second, smaller relay which would use the 12v vehicle running line as a trigger, and would have the secondary side connecting the main battery to the 12v trigger post of the isolator. Then I realized that doing so would also energize the 12v line that's normally on when the vehicle is running, possibly providing power to other devices on the same circuit. At first I thought I could simply wire a switch in parallel to the existing trigger, that would connect the main battery to the 12v trigger post when the switch is closed. The 500 amp isolator that I'm looking at is simply a large relay - the trigger posts are connected to ground and to a 12v signal that's hot when the vehicle is running, and the secondary side of the relay connects the positive terminals of the two batteries. Many smaller battery isolators have such a reset switch or terminal built-in, but larger 500 amp isolators don't appear to have this function. I would also, however, like to be able to override the behavior of the isolator with a manual switch (e.g., to connect the batteries when necessary to use the auxiliary battery to assist in starting). Sold by Sunray Lighting and ships from Amazon Fulfillment. CEC Industries 12V Heavy Duty 2-Pin Electronic Flasher EF32 Relay for LED and Incandescent Bulbs (1-Pack) 9.28.
#Battery isolator relay ac delco professional#
So far so good, there are plenty of battery isolators to choose from. This item: ACDelco Professional D1776 Multi-Purpose Relay. So I'd like to add a second battery to my car and have it isolated from the main battery when the alternator is not running.
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