 Elliot Mainzer is president and CEO of California's independent power grid. He told NBC News. The bottom line is that there are times when we do not have the demand for electricity for the full production of the solar fleet. Sometimes we're able to export it, and there are those times under certain extreme conditions when we do have to curtail it. Sending dispatch instructions to those fleets to reduce their generation. To help solve the problem, California regulators have scaled back the incentives offered to homeowners to install rooftop solar panels.