We have a BMV-712 that seems to have intermittent problems with 30' USB Runs to 2 MPPT Controllers. We've tried 2 different powered USB hubs (on the MPPT side) and 2 different USB cables (with booster chips) to no avail. I've unplugged the USB WIFI dongle because it too seemed to be dropping out intermittently. Everything is patched to the latest firmware. Here's what I'm wondering:
1) Is there is a known problem with longer USB runs?
2) Is there possible a problem with my BMV's USB interfaces?
3) Would a powered USB hub on the BMV side be better placement to amplify the signal to-from the MPPTs?