When you want to retrieve data from a database, you ask for the data by using Structured Query Language, or SQL. SQL is a computer language that closely resembles English, but that database programs understand. Every query that you run uses SQL behind the scenes.
The inverter turns the DC electricity generated by the solar panels into 120-volt AC that can be put to immediate use by connecting the inverter directly to a dedicated circuit breaker in the electrical panel.
Just how much electricity you will generate through solar panels depends on four key factors: the size of the solar panel system, the direction and angle of your roof, the level of shading your roof has and the time of year. Typical domestic solar panel systems range from 2kw to 4kw.