solenheter

Solenheter is a Swedish term used to describe quantities related to the Sun’s radiation or to solar energy. It does not correspond to a single formally defined unit in the International System of Units (SI); instead, the phrase is used in different contexts to refer to various measures of solar input or output. Because there is no universal standard, the exact meaning of solenheter depends on the field, source, or organization.

In astronomy and meteorology, solenheter may refer to measures of solar irradiance or insolation expressed in familiar SI units, such as watts per square meter (W/m²) or kilowatt-hours per square meter (kWh/m²) over a given period. The solar constant, the average solar irradiance at the top of Earth’s atmosphere, is about 1361 W/m² and is often cited as a reference value in discussions of solenheter, though practitioners typically report data in SI terms or in energy-per-area over time. In solar energy industries, solenheter can appear in informal contexts to denote the amount of solar energy incident on a surface or the energy yield of a photovoltaic system, again using standard units for precision.

Because the term lacks a single, universally accepted definition, it is important to specify what quantity is meant when solenheter is used: the exact physical quantity (irradiance, energy, or average intensity), the measurement period, and the conditions (location, atmospheric state, angle of incidence). Clear definitions enable proper comparison and conversion between different data sources. See also solar constant, insolation, irradiance, and photovoltaic yield.