please reread my post.
I am a retired auto mechanic (43 years) I have personally rebuilt hundreds of alternators.
alternators need to spin at 3,500 rpm's not engine speed...
Go to an auto parts store and ask to see a rebuilt alternator.
it should have a tag. stating output, and turn on speed..
remember most alternators spin at 2 to 2 1/2 times engine speed.
so Idle is 800 rpm's x 2 = 1,600 rpm NOT fast to power..
so engine speed is 1,500 rpm x 2 = 3,000 maybe 50 percent output of alternator.
you do not have to believe me .. go look at rebuilt TAG.
and for the 7 pin trailer connector charging battery.. look at the size of wire for the 12 volts battery at plug... WAY to small to fast charge a trailer battery.
