The additional solar array will be exclusively used for the charing of the portable electronic devices we plan on having with us. I will set up a charing station that any member of the crew can attach their portable electronic device to and get charged up. Since most portable devices really want 14VDC and Solar Charing fluctuates in their output, I will be installing a "charging battery." That is, I will install a special battery that will be fed by the new solar panels, and the battery will be the provider of charge to the electronic device. This will help ensure we have the 14VDC that devices expect. When the battery is flat, then no device charing will be done. It is as simple as that. :)
Taking this approach will also allow us an additional level of redundancy. If the main solar system goes out, we can switch over to this one until repairs are made.