Originally Posted by jzilla
Okay.. I need some feedback PLEASE. Ever since I first got the bus with new batteries (3 batteries), I've been trying to keep them from going dead. Well being that my bus has two A/C's (Carrier Transicold Units) each unit takes 80 amps to run. With two, that is about 160 amps just for the A/C's. I have a 200 amp alternator right now and that still doesn't keep my batteries charged when just running one A/C. Each A/C's hot wire goes straight to each battery, the third battery goes to my starter. Even though they're all tied in together, if using the A/C they still drop in power. Riding in a bus with windows open in Texas just circulates the heat.
My Question: Can I run my A/C hot wires directly to my alternator? Rather than to each battery. Good or Bad? Your feedback is appreciated.
If this doesn't work another idea that crossed my mind, using my generator to power my A/C's, what would I need to convert the power from my generator to regular battery power? Is their anything that could do that?
Hope to get some feedback soon. Thanks
Don't wire straight to alternator!
Your alternator can put out 200 amps but at what RPM?
It will only put out what is needed to charge your batteries, so if you only have 10 amps being used from the batteries; the alt. will give the batteries back 10 amps and so on
so you need to determine at what RPM your alt. can put out 200 amps and make sure that if you use 200 amps you have a big enuf wire going back to your batteries or you will burn it up.
an example would be if your alt. puts out 200 amps at 4000 rpm (just numbers I don't know what yours is)
and you are turning say 2000 rpm, then you will get no where near the 200 amps you need.
That is why idling your engine will not really charge your batteries up(idling at 800rpm may only be putting out 5 amps if that all is needed )
So figure out the specs for your alt. and go from there
you will need to figure in the pulley sizes so you get an accurate rpm the alt. is turning