Low Amperage From 4-100w Renogy Panels

[dnpowers]

Hello all. I had 4 renogy 100w panels running to a 30amp renogy charge controller. I started noticing a low battery situation so I started doing some tests. If I completely disconnect the panels from the system and check each panel individually I get between 19.5-20.5v on all 4 panels, but I am only seeing .18, .19, .21 & .31 amp from each panel. I ran my multimeter in line on both the + and - wires as well as introduced a load on the circuit with the same low amperage results. What happened or what am I doing wrong? Thanks for your help!

 

[newfutile]

You will only get close to the full rated power when the sun is at 1000 watts per square meter , this assumes no shading, on the back of the panel you should see an open circuit voltage and a short circuit current.