Connecting multiple solar panels and controllers to a single battery bank
I have 2 identical 100W solar panels each with a built-in PWM controller connected to 2 x 130Ah 12V batteries wired in parallel. The 2 panels connect to a bifurcated cable with Anderson plugs so that a single O ring connects to each battery terminal. I enquired with another solar panel supplier about adding one of their 300W panels which also has a PWM controller. They said that you must only use one controller per solar panel array / battery bank. My 100W panels each have their own built-in controller and they are hard wired so I can’t see how I could modify the wiring to make them both charge through one controller. The supplier of those panels didn’t say anything about using a single controller with both panels. I’d like some clarification about connnecting multiple solar panels and controllers to a single battery bank.