Solar Power Environment
How It Works
How Solar Power Works

Typical residential solar power systems use roof-mounted photovoltaic (PV) modules to generate the electricity needed for day-to-day living. By integrating these systems with the local power grid, homeowners can automatically sell surplus electricity through the local grid or top up their solar generated supply by purchasing additional electricity from their local provider as necessary. This highly efficient system delivers a stable supply of electricity while ensuring that none of the power generated goes to waste.

On-grid System  
On-grid Residential Type System
On-grid Commercial Type System
Off-grid System  
Off-grid Large Type System Off-grid Small Type System

Electricity from Sunlight

Just what does the word "photovoltaic" mean, and how do photovoltaics generate electricity from sunlight? "Photo" means light, and "voltaic" means electricity, so putting the two together simply means electricity from light.

The individual photovoltaic cells that comprise Mitsubishi Electric's PV modules are made up of silicon semiconductors. When sunlight strikes the cell, some of it gets absorbed into the silicon material. This solar energy frees electrons within the semiconductor. Electric fields within the PV cell force the electrons to flow in specific directions, which creates a current. N-type silicon carries a negative charge and P-type silicon carries a positive charge. Metal contacts on the top and bottom of the PV cell allow the current to be drawn off for external use.

Electricity Sunlight