Your marine solar panels should have clear instructions for installation. In addition to those, consider the following.
Most marine solar panel systems have three main components:
1. Solar panels to collect sunlight and produce a charge for you.
2. Charge controller to regulate the charge entering your battery and avoid overcharging it.
3. Batteries to store the energy your solar panels created.
Once marine solar panels have charged your batteries, you can use that energy to run most 12 volt DC appliances. These might include your safety lights, regular lighting, pumps, and fans, as well as small appliances. If you add an inverter, you can also run 120 volt AC appliances such as a microwave, radio, satellite dish, or radio. An inverter is a separate unit, not mentioned above, that transforms the current coming out of the battery into that required by most appliances.
First off, check to see that the system has a voltmeter. If it does not, purchase and install one. This will allow you to check the charge you are getting.
Affix your solar panels securely in place, and connect them per the instructions included in your kit. Use only tinned marine grade wire running from the panels to the batteries. If you are unsure of the wire you are considering, ask questions. Regular automotive wire may look similar, but in marine conditions, it will lose its ability to conduct electrical power.