At least here in Michigan, DTE Energy is pushing efficiency and solar. Part of this is a legislated requirement, but I think the big motivator is how the regulator calculates their profit margin. AFAIK, they don't make their margin on selling electrons, but on capital investment. Higher utilization of their generating capacity just means slimmer profit margins. Most of their plants are 40-50 years old so they have plenty of capital investment and profits headed their way even if solar cuts into demand. I could be wrong about any or all of this, since I'm working off memory and I'm not going to read 100 page regulator reports.