The most common system failures are blown fuses, tripped circuit breakers, and bad connections. A good place to start is to check the output of the system at the inverter. This fascinating process begins when photons from sunlight strike the semiconductor material, typically silicon, within a solar cell. Sometimes the manufacturers give the curren or multimeter, rheostat, and connecting wires. If the weather conditions are favorable, your solar system should start producing solar energy after. solar panel is giving. When disconnecting the panel, regulator. Solar panel testing measures voltage, current, and power output to verify panels function correctly and produce expected electricity. Healthy. My SMARTSOLAR app on my android is showing 0 Watts. Not sure as I am looking for some hint via the solar wattage. Any suggestions on how to run a diagnostic, etc?.