DC Miniature Circuit Breaker, 12V-110V Circuit Breaker 2Pole 20Amp Breakers DIN Rail Mount（mcb） for DC Systems,Battery Power Systems, Solar photovoltaic Systems, RV.(C20A)

I am adding a breaker between the solar panel and solar controller today, I ordered one from Amazon it's supposed to be here today. https://a.co/d/0htPWY8N

Yeah, some people over complicate their setup, and some are very dangerous, they have the negative and positive busbars too close, if you notice on a battery the posts are far apart to prevent contact, the same should be for busbars. Anyway my setup wouldn't change much for additional batteries or panels. To add a battery, I would just use a short negative and positive wire to connect the battery. Like this. https://a.co/d/03goe0Z3 To add a panel, I would use a splitter to connect the panels, I would also add a breaker to the wire coming in from solar panel to solar controller, I do have one coming in tomorrow. I will be adding this type breaker tomorrow. https://a.co/d/029Rw09H Splitter for additional solar panel. https://a.co/d/0ff2YdkU