Just unboxed two TP6048 set them up for parallel operation, went through all the settings and pushed the on button. One popped the circuit breaker from the batteries, the other is still working. I check all the settings and tried again. Popped again. I unhooked that unit from parallel connections and now I’m just running one. All good but we had no sun today so I fired up the generator. It works well but does not charge the batteries. I went thru all the settings again. No joy!