charging // batteries

   I have 2021 rpod196 with a single solar panel on the roof. I have purchased a renogy 200 watt portable system with 20 amp controller. I have attached a pos and neg line to my parallel batteries which sticks outside the battery box and plan to attach the solar systems alligator clips to the lines to add additional charging capacity when off the grid. Is there any problem with compromising the existing onboard system in doing this?  

    Also if I wanted to attach a battery charger running off a generator to these outside lines could this mess with the existing onboard system. I was thinking that i could turn the battery disconnect switch which is outside the camper off before doing this but not sure if this matters? I know that I can connect the generator to the camper and this will also send a charge to the batteries but thought since I already have these outside lines perhaps it would be more efficient to go directly to the batteries this way? Also the charger has a boost feature which might speed things up if used rarely and sparingly. Thanks in advance for any suggestions or help . Hunter

  The portable solar system comes with a controller, fuse , and the alligator clips to hook into the batteries on the outside of the camper. I just added the pos and neg leads to make it easier to attach the solar when I am using it. I guess I will just use the generator to charge with the charger that came with the camper for when I am directly hooked up to shore power or the  generator. Thanks for your input.