How to measure the energy conversion efficiency of solar cells

How to measure the energy conversion efficiency of solar cells

For example: in Chengdu, when using solar cells to generate electricity, the measured radiation is 1000W / m2, while a solar panel (1.5m2) generates 240W / piece under 1000W / m2 radiation, the output power is 240 / 1.5 = 160W / m2, and the energy conversion rate is output divided by output

What is the energy return period of solar cells

It should be called energy recovery period. The definition of energy recovery period: the energy consumed in the whole life cycle of a photovoltaic power generation system divided by the annual average energy output of the system, in years. That is, the photovoltaic power generation system can recover the energy consumed in its life cycle within a few years. Obviously, the shorter the recovery period, the better