Nevada regulators Thursday voted to recommend a proposal that would grandfather existing solar customers under old net-metering rates. Those rates were eliminated last December. The proposal grandfathers existing solar customers for 20 years. Last week, a committee of Governor Brian Sandoval’s New Energy Industry Task Force proposed applying old net-metering rates to customers who purchased systems before December 31, 2015, for 25 years. That would overturn regulators’ February vote. However, the current proposal ignores Nevada’s previous 3% — or 235-megawatt — cap on government-subsidized solar installations. Regulators say Nevada spends about $16 million annually to carry the residential solar market via net-metering payments.