Excess energy beyond the building energy demand can be sold using net-metering, but only at market electricity rate. The building owner cannot charge a premium for the renewable energy. If the excess energy is sold at a price higher than market rate because it carries a green premium, it cannot be counted towards this credit, because you’re selling the environmental attributes of the power as RECs for someone else to claim. Although a bit convoluted, you can claim that electricity by purchasing RECs from a Green-e certified source (similarly to EAc6: Green Power). These RECs can be generated by any energy source, such as solar, wind, or biomass, and doesn’t have to be same as the LEED project fuel source.