mppt vs pwm
Hi, A nice little video comparing mppt vs pwm with the batteries in bulk mode. mppt vs pwm
Forum Discussion
jrnymn7 wrote:
Concerning the "20%" question.
It is the difference between the 48 amps, from a 12v series/mppt set-up JiminDenver has seen reported, and the 60 amps he would expect to see from his own 24v parallel/mppt set-up. 48/60 = 80%. Do I have ..............
PT always gets his percentages wrong for some reason. 5 is 25% more than 4, not 20% more. However, 4 is 20% less than 5.
I don't have the original post for 20% between 48 and 60 but 60 is 25% more than 48 and 48 is 20% less than 60
AFAIK, the Shunt controller and the PWM controller do act the same during Bulk. they both let the amps through as though the controller is not even there. The difference is when the battery voltage reaches the set point and they start "controlling"
The Shunt shorts the panel to do on and off so during Absorption, the length of the times on become less as the battery rises in SOC On the Trimetric this can make you dizzy watching both the voltage and the amps go up and down.
The Series (or PWM as is called) does Absorption by holding the voltage and so amps taper. It still fiddles with the amps to keep the voltage up, which you can watch on the Trimetric.
