I installed this system on my camping van in 2017. I chose the Renogy 100W panels for the reasonable cost, (at the time), and the dimensions needed to fit the roof. Also considered what if a panel failed. If so I only lose 25%. In 2017 MPPT was considerably costly and PWM were highly recommended for 12 volt systems, 400 watts and under. The MorningStar was selected as the best recommended. I am still pleased with my purchase. Operating in general 30 to 40 degrees north, right coast.