we all agreed this will work?
Oh yes, on my install, this is the exact route I will now be going - no variation. The only big thing I will be doing is to change to a lot better alternator to cope with the added strain of having to run the PC/ICE etc and charge TWO batteries.
What do you call an isolator (whats inside, what does)?
You don't need a device to separate current flowing to the batts, just putting the batts in parallel does the same. Are you planning to select wich batt are you charging?, if so, your car wil DRAIN its battery while you charge the other.
Really, i think this is not good if it is just selecting batteries, or WON'T SOLVE THE CRANK PROBLEM, if it is separating current.
For this option I prefer a relay, the best option. The diode is simpler to install, as no messing with car signals is required.
A battery isolater does what it says - it isolates the batteries from each other. Think of it as 3 diodes - one from the alternater to a center point. And then one diode to each battery. That way the alternater can send current to both batteries but neither battery can drain the other.
Interesting. since I am planning on putting a second battery in the car for other reasons, I might look into this. My battery has to be in my trunk anyway, so a second one wouldnt be that hard to install for me. how much so isolators cost?
"stop with the REINSTALLS, what do you think we got some lame-o installer!!!" - mitchjs
Why not. Many people are using this approach on this forum. I've read their threads. This is generally the exact approach they arrived at after long thread like this one and were successful.Originally Posted by Mr Crown
Where would one get such an isolator? any ratings/sizes specifically?
im a newb but im pretty shure cranking is starting (please correct me if im wrong)
but why not just have to batteries is parrelel with a heavy duty switch or disconnect hooked up in between the two batteries. so after you start you can just flick the switch and the batteries will connect charging both
An isolator will do exactly that but automatically.
Has anyone considered using a power capacitor. It will provide (stored power) for the little moment your car battery is loaded with the ignition crank.