It’s been a while since we last updated our readers on the fundamentals of SRECs for solar hot water (SHW) systems. Currently two markets, Washington DC and Maryland, allow for SRECs sold from solar hot water systems. There have been proposals to create SREC markets for SHW in other markets, but no other states have concrete plans to do so.
SRECs from SHW systems are calculated by using the annual energy estimate provided by the Solar Rating and Certification Corporation (SRCC) OG- 300 Water Heating System Rating or by converting BTUs to kW-hr equivalents from BTU meters. BTU meter readings are provided directly to the tracking registry (PJM GATS) in BTU’s and PJM GATS converts the BTUs into kilowatts. Calculate kW-hr equivalents by multiplying system BTUs by .000293 and 1,000 kW-hrs = 1 SREC.
Maryland SHW Registration Rules
- Must be located in MD
- Only systems commissioned with passing plumbing inspections issued after June 1, 2011 or later are eligible
- Single dwelling residential systems are capped at 5 SRECs per year
- Commercial systems are not capped
- SHW systems cannot be used for heating a pool or hot tub
- Systems must be certified by the SRCC OG-300 reporting protocol or have an International Organization of Metrology (OIML) compliant meter
- SHW modules must be SRCC OG-100 compliant
District of Columbia SHW Registration Rules
- Must be located in DC
- Residential system must be SRCC OG-300 certified
- Commercial systems producing >10,000 kW-hr equivalents must be SRCC OG-100 certified and have an OIML compliant meter
- Commercial systems producing <10,000 kW-hr equivalents must be SRCC OG-100 certified, have an OIML meter or be certified to the SRCC OG-300 reporting protocol
If you’d like to utilize SRECTrade to monetize SRECs produced from SHW systems in either MD of DC please fill out this application and follow the directions on the form.