If you do a lot a boondocking a quality solar system is a must, I believe the best RV solar systems available are provided by AM Solar. They have the solar panels specially made to their specs for RV use, they also use a MPPT (Maximum Power Point Tracking) charge controller that boosts the amperage coming from the panels for better battery charging.
The bad news is they are located in Eugene OR., here is a link to the company,
AM Solar.
No matter what system you decide to have installed, find a reputable RV Service Center in your area to do your solar installation, ask them they will procure and a system with the components you specify, they should be will to do that.
Another option is to get a quote for the installation of a customer provided system. If they are willing to work that way, you can order the system of choice, have it delivered directly to installers shop. Once it arrives drop off your RV and you are done. This would alleviate any mark-up the installer may place on procuring the system you specify.
I have an AM Solar 300 Watt system connected to 4 - 6V batteries, with a 2000 Watt inverter. We have boondocked for up to 10 days with this system without running our generator. This was in weather that the daily temperature ranged from 45 to 90 degrees, sunny to partly sunny conditions. We used the normal hotel loads, wife ran blow drier and curling iron, TV and home entertainment system usage in evening for a few hours, toaster in the mornings on occasion, fantastic roof vent fans were set to automatically run when temp inside motorhome exceeded 75 degrees. Battery voltage in the morning never got below 12.1V the entire time. The charge controller for this system allows you turn the system off, or select 2 different modes of operation, plugged into shore power (limits the charging current going to your batteries) or no shore power available (full power to the batteries). This system has out-performed the systems I had installed on my previous 2 RV's by a large margin, those systems were also 300Watt systems. I am sold on their products.
Spike