Review on 🌞 BlueFire LCD Digital Display Solar Panel Regulator Charge Controller 30A 12V/24V 360W/720W with Dual USB Ports by Wesley Bell

First of all, the lock nuts that screw on the back are not much wider than the threaded part. Your hole needs to be precise or the nut won't hold it in place. Second, the voltmeter section is a very short threaded body and generally doesn't hold in place very well. Third, the diameter of the holes in the baseplate is too large and the tube modules do not fit securely. Fourth, it's a 30 amp solar regulator, but you can barely stick 12 gauge wire in the slots.