why no one should buy the $120 Renogy 100w solar kit (flash sale)

This terrible kit is on sale.  Yes, it’s substantially discounted from the normal price but it’s still terrible. Don’t buy it. Let us consider the cluelessness here:  mono panels are a poor match for PWM/shunt controllers, due their higher voltage (and hence lower current at a given rated wattage).  The kit would make 6% more