SunWorld data sheetSo so easy to just snap these together in series. MC4 #10 extension cut in half. MC4s to the panels, cut end to the controller. No box, no fuses, no extra connections to give trouble, minimal power loss. Midnight 150 converts the 75vdc to 12vdc for charging. This is how they are designed to operate.
The whole combiner box, #4 feed to the PWM controller revolves around 12 volt panels and just complicates these installs.
These large panels have bypass diodes splitting the panel in three sections. With two panels you basically have six sections producing power and any shade just affects that section. The bypass diodes allowing the remaining sections to push power through to the controller. Again designed for home systems with 10 to 20 panels in series where shade issues on a few panels are not going to shut the whole thing down.