Solar generated electrical power for residential use has become an economic necessity.
Affordable Solar Power Systems are the "wheel" of the 21st century!
It has become the leading way to derive your electrical power needs in an economical fashion. A reasonably designed roof mounted solar system provides electricity a $.05 per kilowatt hour average over 30 years. Compared to average electric company rates of $.15 per kilowatt hour. And also take into account, that the rate you pay now to your electric company will be much higher in 10,20 and 30 years from now!
As a construction project, making "sure" of a roof structure and installing rail system and panels with requisite wiring is a rather efficient modular system to install. The majority of the work is done in a couple of days generally. Simple visual inspection easily confirms proper work. And the electrical wiring, components and connections must pass a battery of exacting tests to satisfy the building department. Therefore, the consumer will always know whether or not he has a good quality job.
Also, though the economics take in a lot of factors. With a little bit of patience, within about an hour of time a knowledgeable person with good communication skills can fully explain and verify the economics of each and every different customers system. The source of all the numbers(factors), can be shown and verified. How they relate to each other. And what they produce! All very straightforward and simple math. All sources of economic data verifiable and understandable. All resultant production numbers can be trusted because the customer will understand their source. Also, as far as economic projections go, and their veracity. The resulting produced economic numbers. (I.e. power produced and cash savings), are very accurate. You can expect 95% accuracy in real-world production over a given period of time.
Your Solar System will produce what it claims it will produce to within a few percentage points! This is one of the true beauties of the solar industry today.