Show/Hide Toolbars

HOMER Pro 3.9

Navigation: Glossary

Direct Normal Irradiance (DNI)

Scroll Prev Top Next More


Global Horizontal Irradiance is the total solar radiation incident on a horizontal surface. It is the sum of Direct Normal Irradiance (DNI), Diffuse Horizontal Irradiance (DHI), and ground-reflected radiation. HOMER uses Solar GHI to compute flat-panel PV output.


See also

Photovoltaic Panels (PV)

Solar DNI Resource


Image source: RReDC Glossary of Solar Radiation Resource Terms, NREL Renewable Resource Data Center from