Sunlight
Light reaches the PV modules during the day.
A clearer look at rooftop solar: how it generates usable electricity and what matters before you plan a system for your property.
Solar photovoltaic (PV) panels convert sunlight into direct-current electricity. An inverter then converts it into alternating current for use by suitable electrical loads.
A rooftop system must be planned for the building, available sun exposure, electricity use and the connection arrangement. The right capacity is determined from these conditions—not from roof area alone.
These are the key parts of a typical grid-connected rooftop solar PV arrangement.
Light reaches the PV modules during the day.
Panels generate direct-current (DC) electricity.
The inverter converts DC to alternating current (AC).
Electricity can serve suitable loads; grid interaction depends on the approved connection.
Export and crediting of surplus electricity depend on the local utility connection and applicable arrangements.
PV panels generate electricity directly from sunlight. This differs from solar thermal systems, which collect heat. For a rooftop electricity project, the practical discussion starts with PV modules, inverters, mounting, protection and the building's electrical connection.
There is no meaningful one-size-fits-all figure for output or savings. Start with a site and usage review.
Structure, access, shade and mounting considerations.
Typical consumption and when power is used.
Existing supply and the applicable utility process.
Safe access, inspection and future service requirements.
Share your location, roof details and electricity needs to begin a conversation about a suitable solar system.
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