Yes, as discussed in the LEED Reference Guide and reinforced by LEED Interpretation #10161 made on 04/01/2012, you can buy RECs for your project to make up for RECs for 100% of what you want to claim for EAc2. You may not apply these REC purchases toward EAc6: Green Power.
Question
Because of how our onsite PV system was financed through the utility, the project is selling the RECs associated with its solar energy production, even though we own the PV array and its power. Is there any way we can earn EAc2?