Temperature Compensation--Battery or Ambient?
OK I have had my fill of why you need a temp comp probe to the battery casing or battery post (whichever one this week it is supposed to go on, the neg or the pos :) ) I understand temp comp and ag...
Forum Discussion
I would not call my attempt to "fool" the Eco-Worthy scientific proof! :) ISTR I was more interested is seeing if it was just that my solar panel was being affected by the heat (lowering its voltage) or if it was something going on with the controller itself.
Cooling the controller didn't help get me more amps, so my conclusion was/is that it was all in the MPPT method of making amps out of voltage and the panel's lower voltage from getting hot was the problem.
That has nothing to do with the controller's temp sensor for adjusting its own voltage set-point values to suit the temperature
It doesn't change the battery voltage. It changes the set-point values from the "nominal" value you set. Battery voltage remains the result of what amps it gets.
Temp used is ambient for where the controller is mounted--and keep it in the shade--don't let the sun shine on the controller! Also might be some own controller heat affecting the temp sensor.
AFAIK a controller doesn't get very warm unless it is cranking out amps near its max rating. Ken can tell us whether the internal controller's own heat giving a too-high temp above true ambient is cancelled by the battery internal temp also getting over the ambient temp, so it all comes out even :)
So whether the Eco-W's temp comp "works" or not needs to be tested in some other backyard test. I have no info on that.
Cooling the controller didn't help get me more amps, so my conclusion was/is that it was all in the MPPT method of making amps out of voltage and the panel's lower voltage from getting hot was the problem.
That has nothing to do with the controller's temp sensor for adjusting its own voltage set-point values to suit the temperature
It doesn't change the battery voltage. It changes the set-point values from the "nominal" value you set. Battery voltage remains the result of what amps it gets.
Temp used is ambient for where the controller is mounted--and keep it in the shade--don't let the sun shine on the controller! Also might be some own controller heat affecting the temp sensor.
AFAIK a controller doesn't get very warm unless it is cranking out amps near its max rating. Ken can tell us whether the internal controller's own heat giving a too-high temp above true ambient is cancelled by the battery internal temp also getting over the ambient temp, so it all comes out even :)
So whether the Eco-W's temp comp "works" or not needs to be tested in some other backyard test. I have no info on that.
