So let me phrase this from another tack: YOU just purchased a new camper that you like very much. You believe strongly in solar but don't know enough to proceed without asking for guidance and you are on a very tight fixed income with little extra dough.
You find 2 good quality 50W mono panels on the roof of your new rig and you have another one just like them in your house awaiting installation.
Do you:
A. Simply install the 3rd panel for roughly a 150W system
or
B. Pull the 2 existing panels and purchase one new 150W panel.
(and have a lot of unused holes in your roof & 3 solar panels you'll have to sell or ???)
