I was wondering if someone could help me solve a small problem with my wind charging arrangement.
I'm using a danb 10ft clone connected to 2 6volt 220ah batteries that are in series for 12v.
I have 2 identical digital meters that are exact in their measurements, well within the 0.1v range that i need anyway.
One is connected to the + and - of my rectifiers
and the other is connected directly to the battery terminals.
The wires coming from the + and - of the rectifiers to the batteries are 14 inches of #10 awg wire.
My question is, I monitored the mill over several hours by using a camcorder pointed at the 2 meters. The current for most of the day was 17 amps + or - an amp or 2 shown on another meter.
Now while the mill was putting out the 17amps the meter at the rectifiers showed 13.1 volts and the meter connected directly to the battery terminals showed 12.5 volts.
I'm not understanding how during charge that I would get a voltage differential of 0.6 volts through 2 #10 awg wires 14 inches in length.....
When there is no charging going on the voltages on both meters is the same.
could someone please give me an idea about why I would have a discrepency?
Is this normal and if so should I only monitor the voltage directly at the battery terminals?
Thank you.