mppt vs pwm

JiminDenver wrote:
BFL

You still have PPT and MPPT confused. PPT is always on, MPPT is in bulk only because it is not linked to the battery voltage and acceptance rate.

Well that is certainly confusing! Maybe one of our experts can say if it is correct.

Even so, things are much clearer. I used to believe that when in PWM you could only get Isc as your max amps even with 24v panels. Now I see that "PWM" has a different actual meaning and that it is the lack of any buck converter in a "PWM Controller" that limits you to panel Isc.

There is still some trickery I don't get how the tracking gizmo in the MPPT controller might have two roles but I can live with the "black box" version and not know what goes on inside it.

I did want to know what to expect when I am measuring my set-up when it is operating like panel voltage in Float, so that is solved--thanks all! I do still need to get my actual intake amps to go with my intake panel voltage so I can derive intake watts to compare with the output watts the controller displays. Then I can get controller efficiency.

I can derive input amps right now from the other measuremnts I got, but only by assuming a controller efficiency number. I can say that the efficiency is pretty good to get that output power, so it is not like the controller is not working right. I am interested in whether it has a lower sort of efficiency from being nearly maxed out