I'm having trouble finding any literature paper that studies this problem. What drives the weight of an MPPT charge controller? How would I go about reducing that weight if I had to design a custom design? The only thing that even alludes to the power-to-weight of an MPPT is this paper, behind a firewall so I can't read it: https://ieeexplore.ieee.org/document/7990724
The clue here is that it's the power transistors that are massive? If I had to design an MPPT with an expected range of input/output voltages and currents, how could I go about determining the heavier objects? Maybe this schematic was potentially the most helpful thing I found, which details the inside of an MPPT: https://www.ti.com/lit/ug/tiduej8a/tiduej8a.pdf?ts=1593845160703&ref_url=https%253A%252F%252Fwww.google.com%252F
But there's no mention of weight of anything. Of course, I could buy an OTS MPPT and strip off the housing, etc. to reduce mass, but I'm trying to go for a more sophisticated design approach. I guess weight has never mattered to MPPTs, being installed near large solar panels on houses, etc., but it is an interesting problem (I think?). What are the components by weight? How can they be reduced (e.g. GaN power transistors apparently?)? And what's the driving factors (e.g. is it current that pushes the need for heavier everything?)
Apologies if this is basic electronics - I am new to the electronics world.