Thank you so much for this info. I have ordered connectors to connect in parallel.
My controller is PWM specs are:-
40amps, max input 12v, max power 520w
Panels are:-
150w, Voc 22.79, Isc 8.67, Vmp 18.44, Imp 8.15
I have 2 x 12v batteries connected in Parallel, 1000w inverter, 40amp charge controller and 3 x 150w panels. When the 3 panels connected (in series), the controller reached absorbtion quickly and then goes into float mode (controller shows 0amps coming in). When sun goes down batteries at 12.2v. When i only connect 1 panel. Charges slower, goes into absorbtion mode shows amp trickling in. When sun goes down batteries at 12.8v. Why?