AC300 not charging from pve, set up wrong? Blank front panel

[TSnow]

I just hooked my Ac300/B300 for the first time, after fully discharging it as recommended, and charged it back successfully with AC wall charging. Then I set it to PVE and it shows 78 volts coming in but no charging is happening, and it’s not showing any watts on the front panel at all. I have four Renogy Solar Panels 320W 24V Monocrystalline, set as two sets of two in series with each other, and both of those paralleled together into the provided MC4 cable. What is wrong? I already rebooted and also took off the MC4 cable and put it back in, no love yet.