
Bright sunshine is not the whole story — heat is the hidden culprit that cuts photovoltaic output, especially in silicon modules, which account for more than 90 % of today’s market and are highly temperature-sensitive. The Role of the Temperature Coefficient (Pmax) Every module datasheet lists a Temperature Coefficient, Pmax (% / °C). It quantifies the power loss for each 1 °C the cell temperature rises above the 25 °C standard-test condition (STC). The value varies by manufacturer and cell...








