![]() ![]() If you had some load connected to the second battery which could draw over 80a while the engine is running, AND had an alternator that is capable of putting out more than 80a, then you could overload that solenoid.Ī 1000w inverter could draw over 80a, so you'd want to try not to run any loads greater than that from an inverter while the engine is running. Just charging up the second battery - no problem. As long as you stay below that, then it will work fine. I stopped dicking around with mechanical relays when I found POWER-GATE battery isolators. Its controlled by a bidirectional BIRD and as such charges both banks as appropiate. ![]() Great For Isolating Second Battery In Boats Making It Dedicated Only To The Stereo System. Allows For Longer Battery Life And Control Over Which Battery Is Being Used. Use at least 8awg wire to and from solenoid for the main contacts, tap an acceptable circuit in the vehicles fuse panel to activate the solenoid, and basically forget about it. Handles 200 Amps Continuous And 300 Amp Surges. in all honesty, the simple continuous duty solenoid is the easiest simplest most effective way to have battery isolation. The solenoid you linked to has a continuous duty rating of 80 amps. My continuous duty isolator/solenoid is just that a continuous duty solenoid. 200 Amp Heavy Duty Battery Isolator Solenoid & Relay. That setup is preferred over diode-type isolators (the ones with the heat sink that you see at auto parts stores) because they don't drop the voltage passing through them like a diode does. What is being done on that page you linked is a pretty common setup called a "split-charge relay". Continuous Duty Solenoid High Current Battery Isolator Relay 12V 80Amp Replacement for White Rodgers 120-901 120-901S1 120901S1 120-105751 120-105751-6 5.0 out of 5 stars 3 16.99 16. When the specs say 500 amps for 30 seconds it makes me think they're talking about the time it takes to start the vehicle.yep, it'll be started in less than 30 seconds, so I'm covered there, but.as far as the maximum amperage.If you are going to use it to tie the two batteries together while the engine is running, and separate them when the engine isn't running, the it -is- an isolator. Buy MaySpare 80-Amp Relay 12V Continuous Duty Solenoid Relay Battery Isolator and Relay White Rodgers High Current Starter Relay 4 Pin SPST: Solenoids. Upgrade Max 300A in Rush Continuous Duty Solenoid Relay Nickel-Plating for Golf Carts, Winch, Marine 12VDC. The tech rep said that "because I won't be energizing its coil" when I crank the starter, the new relay should be fine. 250 Amp Dual Battery Isolator Kit, Universal 12V/24V VSR Voltage Sensitive Relay Battery Isolator Switch Kit, Heavy Duty Smart Battery Isolator for Marine Car Truck RV ATV. The solenoid will be spliced into the +12v battery cable very near the battery terminal. I called the manufacturer's tech support and after repeating my question several times I'm still unclear whether a battery with 800 cold cranking amps will blow this solenoid. Its specs include: 100 amps continuous, 500 amps for 30 seconds. This item: MaySpare 80-Amp Relay 12V Continuous Duty Solenoid Relay Battery Isolator and Relay White Rodgers High Current Starter Relay 4 Pin SPST 25.06 25. Dave RE: Continous Solenoid: Normally ON vs Normally OFF? carnage1 (Electrical) 14 Feb 04 23:44Īs a follow-up to my research, I've found a nice latching relay ($39) advertised specifically as a "remote battery disconnect relay". If I were looking for a "latching" relay, is that the name they would be under in catalogs? I haven't seen that term before. And I've looked at the big cable sized battery disconnect switches, but would like something tiny/inconspicuous rather that clunky and obvious. This will act as an anti-theft device, but more importantly will allow me to easily disable the very remote, very hard to get at battery (not impossible to get at, just not convenient to unhook the cables at the terminals every time I want to tinker). My number one purpose is to have a remote and easily accessed switch to disable the battery from either 100% or 99% of the car 's electrical functions. ![]() And I like the fuel shut-off idea, but will hold off on that unless my solenoid idea doesn't pan out. I always wondered why we see Solenoids instead of Isolators in some of the classics. Thanks for the caution on unexpected failures.something important to consider. Re posts from circuit1952 and ubrales: thanks for the ideas! I can see why my terminology was does make more sense to use the normally open/normally closed terms. MaySpare 80-Amp Relay 12V Continuous Duty Solenoid Relay Battery Isolator and Relay White Rodgers High Current Starter Relay 4 Pin SPST.
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