Hello congrats on your ride! More batteries give you more power for extended run time witch is always plus. But pay attention to wiring, meaning parallel or in series, you dont want to damage anything!! As for the steps like the man said amazon does have a lot of parts for a wide variety of items for you rv. Power steps are simple to install very basic wiring. If you have any questions I will help in any way I can! Good luck and happy camping!!
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