For the huge solar farms on the other hand, this is the value.
The value of the solar farm for the producer and the consumer are totally dependant on the contracts that are signed by both parties.
While renewables have some interesting physical attributes, the contracts in each state have a substantial influence on the real value to be attained by the end customer.
One large benefit of rooftop generation is that no extra transmission capacity needs to be added. Our local generation just pushes out generation from large plants at the edge of the distribution network (that may now need to be curtailed).
The problem with the current California solar contract model is that the investor owned utilities have been pushed to overpay for solar with long term contracts. Then they have little flexibility to manuver as more and more renewables are brough online. That's part of why my rates are so high.