Have confidence to use your RV the way it was intended even if you are not plugged in to power. Simply harness the suns power to keep your batteries charged and ready for your use. These panels allow you to mix and match your own kit according to what fits your needs. First, pick the size of the solar panel according to the use of amps on an average day. Then, simply choose the regulator that will handle the panels amperage output; and last of all, choose the mounting bracket that best suits your application and you will be ready to install.