Keep your solar panels clean. If your solar panels are dirty or obstructed in any way, they won't work as well. Keep an eye on your solar panels and clean them if they're not quite looking their best. Hosing them down occasionally will ensure that they are much more efficient.
Always look for a good and qualified contractor to install your solar system. Just because you are having a new technology installed on your home, does not mean that you should look for new contractors. The type of work is very specialized and having a quality contractor with a proven track record is critical to having your system installed properly
Always use non abrasive cleansers on your solar panels. An abrasive cleaner can scratch the surface of the panel and cause permanent damage and affect how well the solar panel works. There are commercial cleaning solutions to use or you can use a pool skimmer with a very soft cloth on it.