Good luck with the solar. We love our renogy 100watt unit. We have used it for 2seasons and can only say positive things.
One important thing to do is to remember to adjust the positioning of the panel. I do it at night before we go to bed to catch the early morning sun before we get up. I also do it before we leave camp in the morning. I do it again when we return from the days activities. I use a simple compass to find true west and then position the unit accordinglly. I will adjust it several times during the day when we are in camp. The charge controller is very accurate in telling you what the input levels are, so pay attention to that at first until you get a feel for it. I also made 2wooden blocks out of 6x6 to prop up the panel for a higher angle than the stock frame arms allow. There are lots of tables available online that will tell you the optimum angle and direction(degrees between southwest and west) depending on your location.
We have bbeen out as long as 13 days keeping our 2 six volt batteries fully charged usinqg the panel.
Cleaning them occasionally will help their efficiency.
Enjoy the solar freedom!
Vann