The bifacial ratio is the back-side power of the module divided by the front-side power. The N-Type and P-Type modules in the same size can generate power of 560 W and 540 W power in the front side, respectively, at the same irradiance of 1000 W/㎡. For the back-side power, at the same irradiance of 300 W/m2, the calculated back-side powers of the N-type and P-type modules are 52.08 and 40.75 watts, respectively. Thus, we can obtain the back-side energy gains of the N-Type and P-Type modules, which are 9.3% and 7.5%, respectively. Please note that the final calculation results show that the back-side energy gain of the N-Type module is approximately 24% more than that of the P-Type module at the same irradiance.