More Solar for "Us"
Ok, I went off.the deep end? Bought 3 used 37watt uni-solar panels and a blue sky 2000e controller for the hefty price of $400, They were being listed as 75w panels, they are not The tested open...
Forum Discussion
You got a measurement error as the previous data results in a different line resistance. Are you using the same meter for both measurements?
The best way to measure line resistance (or line voltage drop) is to use just one meter. Connect one meter probe to + output of converter and the other meter probe to + battery. Measure voltage (less than 1 V) and current. Now place probe to neg. output of converter and battery ground. Measure voltage and current again. The total line resistance is the sum of the two.
The best way to measure line resistance (or line voltage drop) is to use just one meter. Connect one meter probe to + output of converter and the other meter probe to + battery. Measure voltage (less than 1 V) and current. Now place probe to neg. output of converter and battery ground. Measure voltage and current again. The total line resistance is the sum of the two.
MrWizard wrote:
just measured
15.67v panel voltage into controller
14.44v at controller output
13.55v at batteries
12.20amps controller output
that 14ft run 4ga has 0.89v drop at 12.20 amps
