After testing your solar panels using a multi tester, I suggest you also test it with your solar charge controller. I bought a panel recently that tested very well but did not work properly after being installed. It was a 250 watt panel. It gave 60 volts and 3 Amps in not so direct sunlight. When I connected it to my charge controller and battery bank, it gave 0.5A.
Here are the videos on How to test your solar panels
Testing the diode of the solar panel.