Computer-implemented method for energy balancing solar power plants, by collecting (clt) for an energy accounting time period (EATP) of a solar power plant (SPP, INV, PVS, MDV), in which in which over a recording time "[t 0 to t n]" with n ∈ N 0 corresponding to the energy accounting time period (EATP), <i> regarding an irradiation, in particular being based on a measured plane-of-array irradiation, by measuring an irradiation measurement signal "I(t)", a set of irradiation measurement values "I(t 0)" to "I(t n)" (SIMV) and <ii> regarding a generated power, in particular being based on a measured power of the complete solar power plant (SPP, INV, PVS, MDV) or at least one part of the solar power plant (INV, PVS, MDV) such as an inverter, a "Photo-Voltaic <PV>"-string or a measurement device, by measuring a power production measurement signal "P(t)" (PPMS) a set of power production measurement values "P(t 0)" to "P(t n)" (SPPMV), characterized by: a) matching (mtc) for the recording time "[t 0 to t n]" the power production measurement signal "P(t)" (PPMS) to the irradiation measurement signal "I(t)" by using a curve matching algorithm to identify (idf) based on the set of power production measurement values "P(t 0)" to "P(t n)" (SPPMV) and the set of irradiation measurement values "I(t 0)" to "I(t n)" (SIMV) being collected (clt) at least one good matching time, in which the power production measurement signal "P(t)" (PPMS) and the irradiation measurement signal "I(t)" match optimally through a minimum signal distance, b) running (rn) a fitting algorithm for the at least one good matching time and based <i> regarding a "good matching time"-related part of the power production measurement signal "P GMT (t)" (PPMS GMT) on a subset of the set of power production measurement values "P(t 0)" to "P(t n)" (SPPMV SS) and <ii> regarding a "good matching time"-related part of the irradiation measurement signal "I GMT (t)" (IMS GMT) on a subset of the set of irradiation measurement values "I(t 0)" to "I(t n)" (SIMV SS to generate (grt) according to an estimated power production measurement signal "P est (t, K)" (PPMS est) defined as a function "f(I(t),K)" with "P est (t, K)=f(I(t), K=[k0, k1,...]) a parameter set "K" with at least one parameter "[k 0, k 1,...] ", in which when running (rn) the fitting algorithm a deviation between the power production measurement signal "P(t)" (PPMS) and the estimated power production measurement signal "P est (t, K)" (PPMS est) is minimized by tuning or changing the parameter set "K", c) calculating (clc) for the recording time "[t 0 to t n]" based on <1> the set of power production measurement values "P(t 0)" to "P(t n)" (SPPMV), <2> the set of irradiation measurement values "I(t 0)" to "I(t n)" (SIMV) and <3> the generated parameter set "K" with the at least one parameter "[k 0, k 1,...]" the estimated power production measurement signal "P est (t, K)" (PPMS est) in order to determine (dtm) a value for an energy loss (E loss) by an integral calculation of a power difference ∫ P est t K − P t dt. a) matching (mtc) for the recording time "[t 0 to t n]" the power production measurement signal "P(t)" (PPMS) to the irradiation measurement signal "I(t)" by using a curve matching algorithm to identify (idf) based on the set of power production measurement values "P(t 0)" to "P(t n)" (SPPMV) and the set of irradiation measurement values "I(t 0)" to "I(t n)" (SIMV) being collected (clt) at least one good matching time, in which the power production measurement signal "P(t)" (PPMS) and the irradiation measurement signal "I(t)" match optimally through a minimum signal distance, b) running (rn) a fitting algorithm for the at least one good matching time and based <i> regarding a "good matching time"-related part of the power production measurement signal "P GMT (t)" (PPMS GMT) on a subset of the set of power production measurement values "P(t 0)" to "P(t n)" (SPPMV SS) and <ii> regarding a "good matching time"-related part of the irradiation measurement signal "I GMT (t)" (IMS GMT) on a subset of the set of irradiation measurement values "I(t 0)" to "I(t n)" (SIMV SS to generate (grt) according to an estimated power production measurement signal "P est (t, K)" (PPMS est) defined as a function "f(I(t),K)" with "P est (t, K)=f(I(t), K=[k0, k1,...]) a parameter set "K" with at least one parameter "[k 0, k 1,...] ", in which when running (rn) the fitting algorithm a deviation between the power production measurement signal "P(t)" (PPMS) and the estimated power production measurement signal "P est (t, K)" (PPMS est) is minimized by tuning or changing the parameter set "K", c) calculating (clc) for the recording time "[t 0 to t n]" based on <1> the set of power production measurement values "P(t 0)" to "P(t n)" (SPPMV), <2> the set of irradiation measurement values "I(t 0)" to "I(t n)" (SIMV) and <3> the generated parameter set "K" with the at least one parameter "[k 0, k 1,...]" the estimated power production measurement signal "P est (t, K)" (PPMS est) in order to determine (dtm) a value for an energy loss (E loss) by an integral calculation of a power difference ∫ P est t K − P t dt.