Calling on Solar Techies
I have been thinking of going solar for some time and decided to pull the plug. My wants are a 400 to 500 watt system. I have four 12 volt batteries with 340ah. I am not planning on changing b...
Forum Discussion
BFL13 wrote:
IMO (maybe not understanding) question not answered----
AFAIK, that is what the MPPT controller also does in Absorb and Float. AFAIK that is called PWM, without considering whether current in equals current out.
If you just switching a switch on and off (ie PWM) then you cannot increase the current, you can only decrease the average voltage. Therefore, if the current is being increased by the controller is not acting like PWM controller.
As the photo of the Victron parameters showed earlier - it is clearly boosting the output current while in float, therefore it is acting as a DC-DC buck converter, not a PWM regulator.
I think the misunderstanding may be that a switch mode power converter (eg an MPPT controller or any type of DC-DC converter) internally uses switching transistors, it is therefore a PWM controller.
It may be worth reading up on how DC-DC converters work:
Buck Converter
