MC4 to battery post cable?

red31 wrote:
from
http://www.genuinedealz.com/voltage-drop-calculator

24' (20+4) 12v, 10g, 5A, voltage drop .246v

that means if you reach a 14.6v set point, only 14.354v reaches the batt.
of course as the batt reaches full and say the current is 2A, voltage drop would decline to .1v or 14.5v at battery. That is the nature of the controller being on the back of the panel and AWAY from the battery, but being portable you can re position and tilt for best harvest if ya like.

Thanks again. In your calculations you have 5A and not 10A (as per controller??) I am asking because I am not knowledgeable on the subject.
Looks like from what I read (from Renogy) up to a 3% loss is acceptable (obviously less is desirable), is that correct?
So would this be about the max I could extend the cable length:
30' (26+4) 12v, 10g, 5A, voltage drop .359v 2.99%

thanks Paul