Solarwert

Solarwert is a metric used in solar energy analysis to quantify the economic value of solar generation for a given site and time period. It may be defined as the earned or avoided value of one kilowatt-hour of solar electricity, incorporating local solar irradiance, photovoltaic system efficiency, and market signals such as electricity prices or avoided costs. Different implementations exist, and the unit can be currency per kilowatt-hour or a dimensionless index.

Origin and usage of the term are primarily found in German-speaking energy research and industry discussions, notably in technical papers and consulting reports from the 2010s onward. It is not a universally standardized term; definitions vary by study or policy context.

Calculation and applications of Solarwert involve combining data on solar radiation, PV performance, and price signals to produce a site-specific value. It is used to rank locations for solar investment, simulate revenue under different market conditions, or inform policy impact assessments. Solarwert complements other metrics such as capacity factor and levelized cost of energy by focusing on instantaneous economic value rather than long-term costs.

Limitations include sensitivity to assumptions about system performance, financing terms, time horizon, and regulatory frameworks. Weather variability and future electricity prices can significantly affect results; therefore Solarwert is typically presented with scenario ranges and transparent methodology.

Relation to other metrics: while it shares goals with capacity factor, LCOE, and avoided cost analyses, Solarwert is not a fixed standard and should be interpreted within its specific definitional context. Related concepts include capacity factor, LCOE, solar irradiance, photovoltaic systems, and energy economics.