Why can't the current tested by multimeter reach the nominal current?

A: Because short-circuit current is a parameter to measure the quality of solar cells, a parameter can only be tested with a component tester, and the multimeter itself is a load, so the test parameter is working current, please do not misunderstand. Moreover, the test condition for solar panels is 1,000 watts/square meter illuminance 22 degrees celsius am1.5 (atmospheric transparency). our solar panels are tested under standard light intensity, which is a theoretical concept. solar panels will be moderately reduced according to different buyer regions, weather conditions and pollution levels.