Read Why parallel at this link, more you read though more you know why I think the way I do. And why I know 2 battery's is not worth it, or believe me, I'd have found a way and posted a how to.
I think I am thinking "Out of the box" here because I have done this so much with boats. And with boats, it's vital you get the most bang for your buck, Isolators while cool, fail and really don't give you much bang for your buck. Most bang is a Battery switch that shares the banks, for like $12 you go A bank, B bank Or Both banks. But it's by hand. Way more reliable. I'd love to explain my set up, but it would be way past comprehension here? I have that same switch wired in backwards on a 2 bank of Parallel Deep cycle Battery's and a single Deep cycle
. So when my switch is in A, my 2 banks runs Acc.'s and the motor runs off one bank and charges 1 bank. But when I go switch B My Acc.'s run off one bank and the motor charges bank one. The way I have it hooked up, I never run Both (Or the two bank will try to dump into the one bank) So basically, I used a switch as an isolator for $12 and have it to where I have a parallel set up with 2 Deep cells matched and One Deep cell that stands alone. Now why is same reason we want for our X's, So I have two High AH Deep cycles to run long drain heavy loads for long times. But, still always have a backup starter battery to get the motor going should I go below 11 Volts of either bank. Just by flipping a switch. I've had a boating Co look hard at my system and consider copying it for new boats. Maybe they will some day. The said pretty nifty, never seen no shit like that before. But with that set up, I can get stupid on the lake and still start my engine and have gobs of Power to run an Electric motor, depth sounder, GPS Stereo, Radios, and all that and never worry. I also have both banks hooked to a on board charger that conditions each bank and fully equalizes and charges it then maintains it, just by plugging it in.
Now I know all this sound unbelievable, So here are a few pics, although I am missing the rear Starter Group 27 deep cycle a Combo 24 is shown in it's place. Just never took a pic of the new one I don't think.
In this pic, just in front of the RED flashlight is a big Red switch, that's my AB Both switch I was Talking about.
This is my 2 Bank hooked in parallel Group 31 Bank, Enough power to run from Canada to the Lake Erie Ohio shore on a Minn Kota PD55 with auto pilot, No one else I know of can do that. Plus I can have the tunes going the whole way!
This is my Group 24 Batt in rear location mentioned, You can see the famous green tag of the Priority Start that did not work as mentioned below and was whole reason I went with this set up. This Batt is now a Group 27 Deep Cycle, enough to power all this for about 4 hrs uncharged.
Now why all the power? Well I go to Lake Erie a lot, Dangerous lake, i live on the edge. I have fun, I stay on the lake for Days sometimes, I have a camper cover and, this is home, TV, DVD, Surround sound, Garmin GPS, XM, Gigantic competition stereo system (Under waterproof cover there) An inverter (120 Volts for optional flat screen TV) and loads of other options, Heater stuff like that. This give you the idea.
Once I get home, I plug this in and it brings it all back up, tuned the battery's separately (By Bank) levels out the cells and tops them off without overcharging them, then maintains them. And so cool, it will do any type of battery, Wet, AGM, Gel. I choose Wet Cell after about 3 months of study. Best bang for the buck! This system is 5 years old and tests out same as new! We are talking testing in this fashion.
This is kind of the mess you have hooking all this stuff up, Kinda crazy buy a brand new boat and 30 days later take it almost all apart and re do all the electric in upgrades and add on's. A Ranger is a Better Hull but this boat has it all! Anyone wanna help?
My Grandfather rebuilt battery's for a 2nd Job at home after work, he was an electrician in a Mill. He knew a lot and he taught me. (I lived next door) From what I learned and today's technology, I devised this MC set up. Now, the reason why is because I tried a http://www.prioritystart.com/
When the boat was Brand New and it left my 70 year old father on the lake with no fricking power! (Old men tend to forget the depth sounder has been running for 6 hours on Starting bank) Everything happens for a reason.
If I was going to do a system for the X it would be matched Optima group 31 Yellow Tops hooked in parallel. Easily Start the X, and gobs of power and juice for any winch job on hand, even with the motor off. They'd be like almost un killable. NO Isolator or switches needed. Just the battery's.
Light, and off road winch friendly!
And thanks for letting me voice my experience & opinion. MC