SRECs Explained: How Solar Renewable Energy Credits Work
According to the U.S. National Renewable Energy Laboratory NSRDB (National Solar Radiation Database, 2024 release) and the DSIRE U.S. Database of State Incentives, the U.S. has more than 5,000,000 active residential solar installations as of 2024, with average annual solar irradiance ranging from 3.5 to 6.5 kWh/m²/day across all 50 states. See our methodology for source documents and refresh cadence.
Updated January 2026 · PlainSolarData Editorial
What Is an SREC?
A Solar Renewable Energy Certificate (SREC) is a tradeable certificate representing 1 megawatt-hour (MWh) of electricity generated by a solar energy system. Solar owners can sell SRECs to utilities that need them to meet state Renewable Portfolio Standard (RPS) requirements.
How SRECs Work
When your solar panels generate electricity, you earn one SREC for every 1,000 kWh (1 MWh) produced. A typical 6kW residential system in a mid-solar state generates about 8,000 kWh per year — meaning you'd earn approximately 8 SRECs annually.
These SRECs can be sold to utilities, who must purchase them to demonstrate compliance with state Renewable Portfolio Standards (RPS). The value of each SREC is determined by market supply and demand, constrained by the RPS "compliance penalty" that utilities pay if they don't meet targets.
SREC Values by State (2026)
- District of Columbia — $400–$500/SREC (very high due to aggressive RPS + limited local solar)
- New Jersey — $90–$152/SREC (SREC-II / Transition Renewable Energy Certificate program)
- Massachusetts — SMART program at $0.05–$0.30/kWh (equivalent to $50–$300/MWh)
- Illinois — $65–$75/REC for 15-year contracts (Shines program)
- Maryland — ~$60/SREC (market rate, varies)
- Pennsylvania — ~$35/SREC (market rate)
- Ohio, Virginia — Active markets at lower rates
SREC Income Example
Consider a 6kW solar system in New Jersey generating 8,000 kWh/year:
- 8 SRECs per year × $120/SREC = $960/year in SREC income
- Plus net metering savings at 18.5¢/kWh × 8,000 kWh = $1,480/year
- Total annual value: approximately $2,440/year
- System cost ~$18,600 → payback ~7.6 years (without state incentives)
Contracted vs. Market SRECs
Some states offer long-term SREC contracts (fixed price, guaranteed):
- Illinois Shines — 15-year fixed-price renewable energy credit contracts
- Massachusetts SMART — 10-year production incentive at fixed rate
- Rhode Island REG — 15-year power purchase agreement
- Vermont Standard Offer — 25-year contract
Other states (NJ, MD, PA) have open SREC markets where prices fluctuate based on supply and demand. Market SRECs provide potentially higher returns but with price risk.
How to Register and Sell SRECs
- Install and interconnect your solar system with your utility
- Register with your state's SREC tracking system (varies by state)
- SRECs are automatically issued monthly or quarterly as production is reported
- List SRECs for sale through a broker or trading platform (SRECTrade, Sol Systems, etc.)
- Receive payment when SRECs are sold to utilities
SREC data sourced from DSIRE USA. SREC prices are indicative and change based on market conditions. Verify current prices with state agencies or SREC trading platforms before making investment decisions.
SREC Price History by State
SREC prices have shown significant volatility over time. Understanding price trajectories helps set realistic expectations for SREC income projections.
| State | 2024 Avg | Peak | Low | 6kW Annual |
|---|---|---|---|---|
| New Jersey | $120 | $290 | $100 | $960 |
| Maryland | $60 | $190 | $45 | $480 |
| Pennsylvania | $25 | $310 | $15 | $200 |
| Massachusetts | $290 | $480 | $200 | $2,320 |
| Illinois | $65 | $80 | $55 | $520 |
Massachusetts stands out because its SMART program offers a fixed 10-year incentive rate ($0.06-$0.14/kWh) rather than a tradable SREC, providing income stability. New Jersey and Maryland have active spot markets with higher price volatility. Pennsylvania's oversupply has depressed SREC prices to $15-30, making it one of the least attractive SREC states despite having an active market.
Worked Example: NJ vs PA SREC Economics
Two identical 6 kW systems producing 8,000 kWh/year in neighboring states:
- New Jersey: 8 SRECs x $120 = $960/yr + $1,480 net metering savings = $2,440/yr total value. Payback: $18,600 / $2,440 = 7.6 years
- Pennsylvania: 8 SRECs x $25 = $200/yr + $1,120 net metering savings = $1,320/yr total value. Payback: $16,800 / $1,320 = 12.7 years
The difference is striking: a homeowner 15 miles across the Delaware River in NJ earns $1,120/year more from the same sunshine. This is why SREC-eligible state selection matters enormously in solar ROI calculations.
Future SREC Outlook
Most active SREC markets are trending toward lower prices as solar capacity grows and RPS targets are met. New Jersey's SREC program transitions to TREC (Transition Renewable Energy Certificates) at a fixed $90 starting in 2026, reducing income by ~25% for new enrollees. Massachusetts SMART rates step down as capacity blocks fill. Illinois Shines prices have remained relatively stable due to expanding RPS requirements. Homeowners should model SREC income declining 10-20% over a 10-year horizon rather than assuming current prices persist indefinitely.
