Deryk,
I originally was concerned about sun angles, shade, crummy weather ect. prior to installing a 100 watt mono-crystaline panel with a single group 27
battery, but after having used this se-up for a couple of years, while traveling up the wet coast, those fears left. I noticed that as soon as it started to get
light (prior to the sun actually cresting the horizon) the panel started producing electricity. Obviously if one needs to extract every measure of sunlight, angles, tracking the suns path, etc would be crucial, but to replace 30 or less amp hours of electricity used throughout the previous night, what I had, was sufficient to bring the battery up to 13.2 by the end of the day. Of note, I was running a NoveKool 12 volt
refrigerator 24/7 for a couple of months at a time, as well as watching a couple of movies each night and recharging laptop, phones, walkie talkies, all "off the grid".
I think you should start with a single perm. mounted 100 watt panel and see if would be enough for your needs, as you can always add a suit-case unit, or another perm. mounted one at a later date.
Dave & Paula