Remember to account for any extra influences when you calculate how much you can expect your solar panels to output. There are some intended outputs specified on panels, but that is only accurate if they are placed in an area that is sunny all the time. Any obstruction from trees or from a cloudy day will decrease the output.
In this video I show you a DIY solar system that can be installed with little effort. Produces enough power to run a couple large appliances and for half the price …
When researching for a good solar panel installer, don't forget the Internet. Yes you may start out in the phone book, but the Internet will give you a lot more information as well. You may find testimonials from other clients and ideas for contractors that you may not have realized are out there.
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.