Parameters | Expression | Equation number | Unit |
---|---|---|---|
Performance ratio (PR) | \(\begin{aligned} {\text{PR}} & = \frac{{{\text{PV}}_{{{\text{outspecific}}}} }}{{{\text{GTI}}}} = \frac{{Y_{{\text{f}}} }}{{Y_{{\text{r}}} }} \\ & = {{\left( {\frac{{E_{{{\text{out}}}} }}{{P_{o} }}} \right)} \mathord{\left/ {\vphantom {{\left( {\frac{{E_{{{\text{out}}}} }}{{P_{o} }}} \right)} {\left( {\frac{{H_{{\text{i}}} }}{{G_{{{\text{i}},{\text{ref}}}} }}} \right)}}} \right. \kern-\nulldelimiterspace} {\left( {\frac{{H_{{\text{i}}} }}{{G_{{{\text{i}},{\text{ref}}}} }}} \right)}} \\ \end{aligned}\) | (1) | Dimensionless |
Final PV system yield (Yf) | \(Y_{{\text{f}}} = \frac{{E_{{{\text{out}}}} }}{{P_{o} }}\) | (2) | (kWh/kWp’) |
Reference yield (Yr) | \(Y_{{\text{r}}} = \frac{{H_{{\text{i}}} }}{{G_{{\text{i}}} }}\) | (3) | (kWh/kWp) |