That’s one of the craziest things about this. My employers for years would constantly beat it into us, “proprietary information, trade secrets, confidential IP, data security. Make sure we have NDAs in place with suppliers.” Now just give it all away to these random giant companies.
They gain efficiency at lower temps. Cool, clear days are best. At negative 20C you’re looking at ~15-20% increase in power output from the panel itself. Look for the “temperature coefficient” on a solar module spec sheet.