Pretty good article here. The fine print is a killer...
From your link:
“If the CPUC decides to compensate all rooftop solar generation at the avoided cost, rooftop PV becomes cost-effective in just five of the 16 climate zones. But that would be a pretty radical policy change for the nation’s leading solar market, and a difficult one to justify in light of the new solar mandate. “Such a stark reform may not be likely within the timeframe of this code cycle, but this sensitivity serves as a lower bound for potential NEM reforms,” the E3 paper notes.”
Also, note that grid-tied systems usually do NOT function when the grid power is down, bright sunshine, and no electricity!
A few have a dedicated circuit ~2kW, otherwise, it is a big fat extra.
And again who pays for all the solar systems that receive a rebate for unused power at RETAIL rates??? Not simply the avoided cost?