Solar and A Brief Encounter with Leafy Shade
Morning solar with a tree 40’ away. 3x250W series poly panels and 3 bypass diodes per panel. Past 7:50 AM the MPPT controller is decreasing the array voltage as it seeks the maximum power from the arr...
Forum Discussion
oh i know that mppt can produce power, i know it tracks the amps the battery will absorb at a "determined" voltage level
seeks to find the most efficient applied voltage and convert the rest of the voltage higher than that point to more amps
BUT the controller can NOT control array resistance or affect the array in way besides presenting itself as the load (aka resistance) to absorb the power
i do not dispute the recorded data
only the description of the controller (controlling the array),
more important data is the voltage being applied to batteries to achieve the amps that are being absorbed
the panel voltage is a reflection of the "conditions" of use, solar radiance, temp, and how much energy is being fed to the controller, to be used
what the first graph clearly shows is that as the solar radiance increases, the voltage rises, there is more power for the controller to convert to higher amps while maintaining the optimum applied voltage to the batteries
the controller .. controls the charge to the batteries,,,NOT the solar array it self, it controls what comes out, its like a flow regulator, it can go wide open, or it can restrict, it controls what coming out, but NOT what the solar radiance does to the panel
seeks to find the most efficient applied voltage and convert the rest of the voltage higher than that point to more amps
BUT the controller can NOT control array resistance or affect the array in way besides presenting itself as the load (aka resistance) to absorb the power
i do not dispute the recorded data
only the description of the controller (controlling the array),
more important data is the voltage being applied to batteries to achieve the amps that are being absorbed
the panel voltage is a reflection of the "conditions" of use, solar radiance, temp, and how much energy is being fed to the controller, to be used
what the first graph clearly shows is that as the solar radiance increases, the voltage rises, there is more power for the controller to convert to higher amps while maintaining the optimum applied voltage to the batteries
the controller .. controls the charge to the batteries,,,NOT the solar array it self, it controls what comes out, its like a flow regulator, it can go wide open, or it can restrict, it controls what coming out, but NOT what the solar radiance does to the panel
