In the figure below we have a simple way to perform a function test for a solar cell. The circuit is from 1980 documentation, and the 4R7 resistor must have a dissipation of at least 1 W in the case of higher power cells.

In the figure below we have a simple way to perform a function test for a solar cell. The circuit is from 1980 documentation, and the 4R7 resistor must have a dissipation of at least 1 W in the case of higher power cells.