Portable Solar Panels connection ?
I need some expertise on connecting two solar panels. I just bought two portable panels with a controller on the back of one. They are connected together like the top drawing 
with both Positives wires and both Negative wires attached to their respective terminals on the controller. It has about 10' of wire and battery clips for the output to the battery. Nothing attached to the Load terminals.
When I tested the output of the Controller I got 20.1v in full sun. The seller also included another controller new in the box. He had not used any of it nor was there any documentation.
So my questions are: are the two scenarios in the picture the same? I have not had enough sunlight to experiment (sitting in Tennessee waiting for the rain to pass through) and probably won't for a few more days. If the connection is correct, do I use the second controller to limit the voltage to my batteries? Or, will the controller drop the output once it is attached to the 12v batteries (I have not tried to hook them up yet). Or do I disconnect them and wire them like the bottom half of the picture?
Image of the controller on the panels.
Thanks for any help.
with both Positives wires and both Negative wires attached to their respective terminals on the controller. It has about 10' of wire and battery clips for the output to the battery. Nothing attached to the Load terminals.When I tested the output of the Controller I got 20.1v in full sun. The seller also included another controller new in the box. He had not used any of it nor was there any documentation.
So my questions are: are the two scenarios in the picture the same? I have not had enough sunlight to experiment (sitting in Tennessee waiting for the rain to pass through) and probably won't for a few more days. If the connection is correct, do I use the second controller to limit the voltage to my batteries? Or, will the controller drop the output once it is attached to the 12v batteries (I have not tried to hook them up yet). Or do I disconnect them and wire them like the bottom half of the picture?
Image of the controller on the panels.
Thanks for any help.
