I have installed MPPT 100 50 bluetooth controller, using SolidSwithch 104 relay connected via a TX cable ASS030550500.
When connected the light stays on constantly. The switch process does not seem to work. When I check with a voltmeter on each pin of the VE Direct connector there is no difference in output if the solar panels are connected or not (opening and closing the circuit breaker between the panels and controller.) Reading from outboard toward the center I get 5V, 5V, 3.3V, 0V, no matter if the solar panels are connected or not.
It is such a simple installation that it is difficult to think it is not done correctly but I am hesitant to just blame the controller.
Any suggestions?