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.
Last updated August 14, 2013 by Mathias Aarre Maehlum. The total costs of a typical solar panel system of 5kW (15 â 25 solar panels), is typically somewhere around $30,000. According to Lawrence Berkley National Laboratory (LBNL), average cost of labor is $0.59/W â about 10% of total system costs ($6.19/W).