Hundreds of rooftop solar workers showed up to the Nevada Public Utilities Commission meeting, bringing mountains of cards signed by rooftop solar supporters. The PUC has been hearing arguments on whether existing rooftop solar customers should be “grandfathered” into lower rates, instead of being forced to pay the higher ones approved late last year. That decision also cut payments for power sent back to the grid. Regulators aren’t expected to make a decision until later in the week.