Photovoltaics is a method of converting solar energy into electricity using materials that absorb photons of light and release electrons. These electrons can then be converted to an electric current that can be used as electricity.
How Does Photovoltaics Work?
Step 1: The Sun
The sun produces a vast amount of energy through nuclear fusion. The energy travels more than 150 million kilometers (93 million miles) to our planet. Every minute, enough of the sun’s energy reaches the Earth’s surface to meet the world’s energy demands for an entire year.
Step 2: Solar Modules
Solar modules are comprised of a number of solar cells. Light (photons) is absorbed by the semiconductors in the solar cells and converted into electrical energy (electrons). This process generates direct current (DC) electricity which is routed to an inverter.
Step 3: Inverter
The inverter converts the electricity generated by the solar modules into alternating current (AC). Alternating current is the form of electricity used in consumer appliances, lighting, and heating and cooling systems.
Step 4: Meters & Monitoring
Energy meters are employed to carefully measure the amount of electrical energy produced by the array and monitor the performance of the system. In many cases the monitoring system will also track building demand (load), weather and wind data.
Step 5: Utility Lines (Grid-Tied and Bimodal Systems ONLY)
When electricity is generated which is not used directly by the local facility, the energy automatically feeds into the utility grid where it can be used by other customers. The system owner will be paid for the energy production when it exceeds their usage demand.
*Source: DECK Monitoring
Macri Roofing is a NABCEP certified integrator