hello good morning, I have a 40w solar panel connected to a charge controller that in turn charges a 12v 7 amp gel battery. and I wanted to connect a 55 amp car battery using a selector key. the point is that I wanted to know if there is a key where between the charge that comes from the regulator and I have as a switch that I can choose to have the charge go to battery 1 (gel) and then moving it go to battery 2 (car battery ), is there such a key? What's it called and where can I buy it? thanks

you can get it with the name or as a three-point key I think that with that you would solve it (if 2 regulator cables come out)