Re: Joe's '49 Club Sedan

Posted by HH56 On 2020/8/6 12:13:35

I don't know if there is any good way to home test with the low end equipment mostly available but something I read when doing my AC experiments with my version of dual batteries to get a 6/12 voltage supply and researching how to series or parallel charge more than one battery is batteries vary in construction enough that while they both can put out the stated voltage and amps individually, one might have a significantly different internal resistance than another.

Nutshell was batteries that are in a series or parallel configuration need to be fairly well matched. If not, and they are charged together the charge circuit sees the overall need but cannot differentiate between the batteries. The battery with the lowest resistance will get more of the charge to the point it can be seriously overcharged before the level in the other is sensed and the one with higher resistance gets less charge and can be in a perpetual low state because the charge circuit never sees its real need because of the overcharged battery.

I seem to recall another article that stated the AGM cells which I believe Optimas are made from are very sensitive in that respect and do best with a reliable and consistent charge rate.