Fun with solar and Renogy MPPT 30 Li (kind of)

The probabilities in all this suggest all that various equipment and soft or firmware can't all be faulty. That suggests whatever you have set up is not right in some way. Recommend go back to square one.

First thing might be drop the whole load terminals idea. Review where and when the voltages are being read from. Something is just wrong, and remember Pogo. "We have found the enemy, and it is us!"