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.
1. The average cost of solar panels has gone from $76.67/watt in 1977 to just $0.698/watt today (the second figure is according to PVinsights, and is even lower than the 2013 projected price in the chart below). Data Source: Bloomberg New Energy Finance (BNEF).Chart Source: Unknown.he average cost of solar panels has gone from $76.67/watt in 1977 to just $0.698/watt today (the second figure is according to PVinsights, and is even lower than the 2013 projected price in the chart below). Data Source: Bloomberg New Energy Finance (BNEF). Chart Source: Unknown.