Is My System Eligible for Production Estimates? (MD) January 13, 2020 19:05 Updated Follow Systems in Maryland are allowed to have generation estimated by GATS, the SREC-awarding entity, if the system size is 10kW AC or smaller and does not have a revenue-grade meter. Related articles Is My System Eligible for Production Estimates? (D.C.) Revenue grade What are production estimates? Will I receive SRECs for all the energy I've already produced? (MD) Do I need to submit meter readings?