| DC额定功率 | kW | P0 | k∑P(STC,k) |
| 组件双面系数 | - | φ | Pmax,frontPmax,rear |
| 参考产量 | kWh⋅kWp-1 | Yr | Gi,refHPOA,f |
| 双面参考产量 | kWh⋅kWp-1 | Yr,bifi | Gi,refHPOA,f+φ⋅HPOA,r |
| 背面对参考产量的贡献 | kWh⋅kWp-1 | Gbifi | =Yr,bifi−Yr=Gi,refφ⋅HPOA,r |
| 阵列捕获损失 | kWh ⋅ kWp−1 | Lc | Yr−YA |
| 系统平衡损失 | kWh ⋅ kW−1 | LBOS | YA−Yf |