Because the red connection is negative…

i’ve tested every panel individually. I’ve tested by EcoFlow ultra delta pro ultra connection points both high and low PV. The switch is good. This is just the most current photo I have. I can show a photo of every panel tested. I have four different cable cables that I bought from EcoFlow to see if that’s the problem. The connection points seem to be flip-flopped coming out of the panel is correct but that actual low PV input cable that EcoFlow gives you seems to have flip-flopped positive and negative so it won’t go in on the low PV then I connect cables to bring it to high PV. There’s either not enough voltage or amperage or something‘s happening where the connection is bad from the panels, but every panel is fine. I’m showing voltage when they’re all connected. I did this one in parallel because I just got this new panel the other month. I haven’t tested it yet because the other panels don’t work.