Besides using cheaper coal, China heavily subsidizes the solar sector as well as other industries. The panels are sold at a loss just to capture market share. In addition, China doesn't have to worry about labor laws or environmental damage. They just don't give a sh*t. That has been China's business model for years to eliminate competition by undercutting on price. Once they corner the market, then they raise prices and weaponize the product for political reasons. This is the EU's own fault. They are so owned by China at this point that they don't dare pass regulations to protect their own industries for fear of pissing off the Chinese.