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
FWC wrote:I think you will need an oscilloscope to see the PWM. And yes as you load up the controller it will go back to converting wattage to maintain voltage. More pronounced with higher input voltage.
Again - this is really not true. An MPPT controller does not switch to PWM mode in Absorb and Float.
This is super easy to demonstrate if you have an MPPT charge controller. When it is in float and there is still plenty of solar, turn on a load that is around the same as the output you would expect from your solar controller. Watch the panel current and the output current. If output current > panel current (which it will be with series panels) then it is clearly NOT in PWM mode as it is converting 'extra voltage' to extra current.
