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Old 12-18-2012, 11:49 AM   #37
Canine_Rescue_Pilot
Getting Wild
 
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Club Car
 
Join Date: Dec 2011
Location: Dunedin, FL
Posts: 78
Default Re: DIY - 4 x 12v to 6 x 8V Conversion (Part 1)

Quote:
Originally Posted by scottyb View Post
Interesting indeed. Especially the unique attitude that somebody is trying to get rich tricking somebody into buying something they don't need or that 4 months and it still works is a conclusive battery life-cycle test.

I'm curious as to why the Club Car and the Lestronic engineers would make a different OBC for 4/12 batteries and 6/8v batteries. I assumed the algorithm or total cell count to voltage shut off point was different. (pretty sure that's it)

I have no horse in this race but will wait to read your results CRP
Scotty - I don't know. As you well know, the Total "cell count" is the same regardless of the battery configuration. Basic chemical physics: a single lead acid cell produces a given voltage, and that voltage is always the same. So to achieve a total voltage of 48... the number of cells is the same. (whether you do that using 6 8v batteries or 4 12v batteries... the number of cells, in total, is the same).

Now the cell capacity is a different story. Larger plates= higher capacity.
As I mentioned in the original post, the software guy at Ingersoll indicated to me is the OBC firmware revision changes accommodated different current demands in REGEN mode. So, if your cart was programmed to disable REGEN, then the version difference from OBC 3 to OBC 5 wouldn't make a difference under that condition. So GolfCartThing's comment has merit, but I'm being told by Ingersoll that situation would only apply if my REGEN function was active. I have programmed mine off.

However - I'm not so pig-headed that I wouldn't consider another expert's opinion. SO... I make all of my decisions based on test and data. I'll let you know what I learn from the measurements. I question the "ventilation" logic mentioned above... considering the computer and controller position haven't changed from the original factory locations. And since that portion of the tub wasn't modified, and remains within the enclosed plastic channel... it doesn't seem reasonable that the temperature would be any different. But, in fairness I'll measure that and post what I find.

There's no race here. I think we are all wanting the best information to get the most performance, cart/battery life and safety for the most reasonable amount of time and money. I'm a big advocate of "you get what you pay for", but at the same time, I'm also a big advocate of cautiously not wasting money and materials when it's not needed... We have become a disposable society and some of it can easily be avoided with a little knowledge.
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