It is a useful unit for electromagnetism because, in a vacuum, an electric field of one statvolt/cm has the same energy density as a magnetic field of one gauss. Likewise, a plane wave propagating in a vacuum has perpendicular electric and magnetic fields such that for every gauss of magnetic field intensity there is one statvolt/cm of electric field intensity.
The abvolt is another option for a unit of voltage in the cgs system.
|Unit system||esu-cgs and gaussian|
|Unit of||voltage and electrical potential|
|1 statV in ...||... is equal to ...|
|SI derived units||299.792458 volt|
|cgs||1 erg / esu|