How does LG guarantee the output of its solar panels?
LG provides rigorous quality testing to all solar modules to ensure the rated power output. Our modules have a positive nominal tolerance starting at 0% and going as high as +3%. For example, this guarantees that a new LG 315 Watt module will not deliver a rated output less than 315 Watts. In field testing by Ausgrid, 58% of panels were performing less than their rated output. In contrast several independent flash test, including one by Choice in 2016, have confirmed that LG panels over-perform against their rated output.
Below is a typical spread sheet breakdown of the 315W panels and their flash test output in a pallet of new panels. You can see on the sample, our buyers definitely get many more watts than 315W for the majority of our panels.