Okay, I be cornfused. My itty bitty battery charger can fully charge my big honkin WarWagon battery at 14.21 volts and not over 10 amps cause that is all it will put out and my alternator rated an Xity X amps continuous and operating at 14.75 volts and using 25 amps total load which is 75 amps below it rated continuous output of 100 amps? It should not be used to charge the battery if it is discharged to the point that it won’t turn the starter and I have to get a jump? I should not continue my trip but go buy a battery charger and remove my battery and take it into a motel room for 24 hours while I watch “Oprah™” and “Jeapord™”?
Might be the best but I need a little more incentive to do this as so far, with having been driving and killing batteries since 1959, I have never harmed an alternator.
Now, I don’t do a specific gravity test on all my batteries before and after all recharges and do not pull them apart to check condition nor do I do the same on my alternators. Heck, back in the bad old days when alternators were only rated at 20 - 30 amps and were made out of junk materials, I and many folks I know would run cables so an extra battery could be charged for the old farm equipment that the old ‘generators’ had died in.
So, I really need to know why my 100 Amp alternator running a max load of 40 amps is not strong enough nor cooled enough to charge a battery that is not ever taking over 30 amps and that is for less than 20 minutes for as the charge builds, the 14.75 or so volts will only push so much current through.
Splain me more please…
*:: Yeah, I’m being a bit of a smart ass because I know Rick knows his stuff and others here do also, but as an A&P mechanic and an electrical instructor for Spartan School back in 69 and having done the things I have with auto and aircraft electrical systems, I want a bit more in depth answer.
If those who say a totally dead battery should not, or that just any battery that does not have enough to turn the engine should not be and can not be fully charged on a modern car with the higher capacity alternators of today, I want more.
A total dead battery will accept way too many amps if they are available but if they are not due to either regulation or the itty bitty AC powered battery charger won’t put out over 10 anyway. So are we talking a total dead battery that will suck 150 amps if it is available ( skip the part where the battery will self-destruct for that many amps ) and that much load for even 10 minutes will harm the normal
Alternator or … are we talking the normal headlight left on battery rundown where the starter won’t quite turn?
We talking that most folks are just doing short runs and never run the 12 - 24 hours necessary to fully bring back a battery? Or is it a flat ( The alternator will be ruined. )?
Come on those who know, I really want to believe you but I need more better splainin…