The solar charge controller must not limit the current flow during testing.
How to test a 12v solar panel.
You will want to ensure that you place the positive to positive and negative to negative when attaching your multimeter to the connection on the back of your solar panel.
To test the regulator.
Testing a small 12v solar power system step 1 wait for a clear sunny day.
To test solar panel voltage output put your solar panel in direct sunlight set your multi meter to the volts setting and.
Set the meter to above 200 vcd to ensure you get the most accurate reading possible.
Step 3 measure.
You want to choose a voltage range capable of displaying the maximum possible voltage of the panel in open circuit that is when not connected to the battery or charge controller.
Re connect the solar panel directly to the battery without the regulator.
Step 2 measure state of charge.
To test a 12v panel meters should always be set to the dc voltage area which usually identified by the symbol below.
Set the multimeter to 10 amps.
Set the measurements of the multimeter to dc amps.
Then touch the multi meter s black negative lead to your solar panel s negative wire.
Disconnect the positive cable between the battery and the panel.
Measure operating current as described above.
Make sure that the alligator clips are in the right port to find the.
That being done connect the solar panel to the controller and also the controller to the solar batteries.
Disconnect the positive cable that is.