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.
The average household needs a solar panel to provide around 3kW. Solar panel cost will range from between Â£4000 and Â£6000 and will cover around 21 square meters of your roof. The more electricity your system can generate, the higher the initial installation cost, but the savings will also be higher in the long term. It is safe to say that solar panels cost isn't cheap.