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.
Solar Salaries. According to the Bureau of Labor Statistics, the salary for a solar panel installer ranged from $26,250 to $57,980 a year in 2012. The median salary was $37,900 a year. The BLS reports that the median salary can vary depending on the industry.