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Things like an air compressor, extra lights, possibly a power inverter, etc. My desire is to have some extra things run off the auxiliary battery. Why do you feel that you need a battery isolator for this application? It reduces the load on the charging system by not connecting the auxiliary battery until the primary battery is charged to 13.2V. It allows bi-directional charging from the alternator or from shore power. There are no efficiency losses due to diodes. Smaller and lighter than traditional isolators. Prevents loads on auxiliary battery from draining the starting battery. Https:/ / Cole-Hersee-48530-Battery-Isolator/ dp/ B00LMGPHW2 They also monitor each battery's voltage and if one is draining, it will isolate the two batteries protecting one of them from being depleted. This is always giving the starting battery priority. And only when the starting battery is up to say 12.5 volts (charged ENOUGH to re-start the engine), will it close the loop and then allow the auxillary battery to be charged. There are "smart" solenoids that isolate the batteries until the car is running. This is the way they are typically used on boats. Only a switch would allow the batteries to be combined for starting. There are also battery combiners that sense the alternator is running and then combine two batteries. ![]() The isolator is basically a silicon diode to allow the electricity to flow one way, from the alternator to battery. A battery switch is used when you want to be able to combine batteries for starting. You do not want your refrig to drain the battery needed to start the boat for example. #COLE HERSEE 48530 SMART BATTERY ISOLATOR 200A INSTALL#I'm wanting to install a secondary battery to run peripherals and give me peace of mind.Īlthough not critically important, I'd also like to be able to "combine" both batteries if my starting battery is dead or weak and I need to get the truck started.Ī battery isolator is commonly used in boat to isolate the "house" load from the starting load. In my 2018 Silverado 3500HD, I have the heavy duty 220 amp alternator that comes with the snow plow prep package. But I value BITOG opinions, and I'm asking for it now. I've been reading reviews on various isolators and making sure I'm on top of the latest technologies. ![]() #COLE HERSEE 48530 SMART BATTERY ISOLATOR 200A MANUAL#I use a Blueseas 6007m manual switch myself There are dozens of different products which can do what you want. Https:/ / products/ 6004/ Single_Circuit_ON-OFF_with_Locking_Key_-_Red YOu can also use a simple On off Switch like Blue seas. The Ideal trigger circuit would activate solenoid only after engine is running.Īvoid diode based 'isolators' they drop too much voltage slowing recharging greatly. Triggering the soleoid can be done automatically, or manually or automatic with a manual override. will make custom cables professionally, meaning no Hammer crimps or copper clad aluminum wire. You might want to thicken up or add a parallel circuit from alternator to engine battery.ĭon't cheap out on the cables or the ring terminals. If you hook Accessory battery to engine battery with solenoid switching, then both sides of the cable should be fused close to battery. I prefer to avoid extra frame grounds as they becomme problematic all too soon and too often. If you groud accessory battery to frame, make sure the connection is solid, and then add a frame to alternator ground. ![]() Use a large ANL fuse close to secondary battery + terminal. Https:/ / Cole-Hersee-24213-Continuous-Solenoid/ dp/ B005K2429Iįor best possible recharging of accessory battery, Hook it right to alternator via 4AWG or thicker. ![]()
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