So, for a 24V dual (12V x 2) battery setup, how close do they have to be in voltage to be in a "balanced" state? Like, is 12.07 and 12.14 balanced? Thanks.
Dual battery question
- Thread starter coldtaco
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That sounds a bit much too me, I like to have no more than .02 difference. If those are your numbers (and the batteries are same make, model and year), I would pull them out and charge them up individually. If they become different again, they may need changing. (You are not drawing any 12 volt for any of the batteries, are you?)
- Thread starter
- #3
Well, here's what happend. I have the 24V-12V converter. I found out the hard way that if you don't drive the rig within a certain period of time with the converter "on" it drains the battery, or both? Anyway, so I left for a road trip south and did not drive the cruiser right after I got home, it ended up being almost two weeks. Was dead enough not to start. So I had to buy a battery charger and charged both batteries up independent of each other. Drive it yesterday and then checked the voltage of each and they are as stated above. I put the low one back on charger for a while and after unhooking it and waiting a while, the voltage basically dropped back down to stated value. Does this mean I ruined the one battery?
Yeah, that happens with mine too if I don't disconnect the converter. When it happens I disconnect the battery cables and use my jumper cables to connect the two batteries in parallel, then hook the charger to the jumpers and both batteries charge equally.
Probably not. There are many many 24V landcruisers running around with 0.5volt difference. If I have read your post right, you are saying there is 0.07v difference in standing voltage? That is nothing to worry about.
If no load balancer is hooked up, I would not be super worried about a 0.5v standing differnce...but I would swap the batteries side to side every 3 months or so. Check the voltage of each battery when the truck is running and charging. The difference there is the most important.
hth's
gb
doesnt sound like too much to worry about. 2nd that about swapping bateeries every 3 to 6 months. If my 61 is to be left for long periods I switch off the convertor
cheers
Gerard
cheers
Gerard
this converter that you guys keep mentioning, would that be a stock item on a BJ42 1981 3B Diesel... I am noticing the same problem with my LC... leave it a few weeks and it will not start then use a battery booster to jump start one of the batteries...
If this converter is stock, where is it and what is it used for???
If this converter is stock, where is it and what is it used for???
no stock converter, if you keep on having to jump start or charge the battery to get the truck going, i bet you have something hook up on the positive of the right side battery. In otherwords you are using current from one battery to feed a 12V accessories or something.
I didn't use my truck for 6 years because someone had wrongly wired the thing.
You are supposed to have only one stock wire connected in between the battery, and it is for the stock 12V head light, anything else is is bad, i mean really bad.
The converter we keep talking about is a add on, you need to buy a 24V to 12V converter to prevent using 12V from one of the battery
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I Agree.
I have connected my converter to the ACC position of the ignition switch. This prevents draining the batteries when not in use for a longer period. Ofcourse, you won't have a permanent 12V source, so your radio will loose it's presets.
Gr Ton
I have connected my converter to permanent source, but to be able to only feed the radio presets. Everthing else goes throught 2 relays, each of them is activated by the ignition, so i have live current, current from accessories and when the ignition is at on position.
crushers
post ho
well, it is not advised but not REALLY bad as long as you are willing to replace the batteries often and don't mind "no starts" some mornings espec when it is cold out...
much wiser to have a converter...
