SREC Aggregator: How It Works, Fees, and How to Choose the Right Partner

Owning a solar energy system can create value beyond lowering your electricity bill. In markets with active Solar Renewable Energy Certificate programs, eligible solar generation can also produce tradable certificates known as SRECs.

But generating an SREC and successfully turning it into revenue are two different things.

Solar owners may need to manage system registration, production reporting, certificate tracking, SREC sales, market timing, and payments. For homeowners and businesses that do not want to manage these steps themselves, an SREC aggregator can simplify the process.

An SREC aggregator typically manages SRECs from multiple solar systems, helps coordinate their creation and tracking, and facilitates their sale into the appropriate market.

Understanding exactly what an aggregator does, how it gets paid, and what is written into its contract is important before choosing a provider.

What Is an SREC Aggregator?

An SREC aggregator is a company or service provider that manages Solar Renewable Energy Certificates for multiple solar system owners.

Instead of every homeowner or business individually handling certificate administration and finding buyers, an aggregator can combine or manage SRECs from numerous systems and handle part or all of the transaction process.

An SREC represents the renewable attributes associated with solar electricity generation. In the United States, one SREC is generally created for each megawatt-hour, or 1,000 kilowatt-hours, of eligible solar electricity generated. The U.S. Environmental Protection Agency explains that SRECs are created for each megawatt-hour of solar electricity generation in applicable markets.

The solar electricity itself is separate from the certificate. Selling the certificate means transferring the renewable-energy attribute represented by that SREC, not selling the electricity produced by your panels.

How Does an SREC Aggregator Work?

The exact process depends on the market and the services included in the aggregator's agreement, but the basic process usually starts with an eligible solar system producing electricity.

Once sufficient eligible electricity has been generated, the corresponding SREC can be created through the applicable certificate tracking system.

The aggregator may then handle production data, certificate administration, account management, sales, transfers, and payments depending on the service arrangement.

For example, PJM Environmental Information Services operates the Generation Attribute Tracking System, commonly known as GATS, within the PJM region. PJM also maintains public information about aggregators and brokers participating in renewable certificate markets.

The process may look simple from the solar owner's perspective, but several administrative steps can take place behind the scenes.

1. Your Solar System Generates Electricity

Your solar panels generate electricity throughout the year.

When the system produces one megawatt-hour of eligible solar electricity, it may generate one SREC, subject to the rules of the applicable program.

That means a system generating 10 MWh of eligible solar electricity could potentially create 10 SRECs.

However, actual eligibility depends on the market, location, certification status, ownership arrangements, and other program requirements.

2. Production Is Recorded and Reported

Solar generation needs to be measured and recorded.

Depending on the system and program, production data may be submitted manually or collected through an approved meter, inverter connection, monitoring platform, or other reporting method.

Some aggregators provide production-reporting services, while others expect the system owner or another service provider to maintain that responsibility.

This is one reason it is important to understand the exact scope of an aggregator's service before signing a contract.

3. SRECs Are Created and Tracked

After qualifying production is recorded, certificates are created within the relevant tracking system.

In PJM territory, GATS provides the certificate-tracking infrastructure used for renewable energy certificates. Solar owners should not confuse the tracking platform with the company actually buying or selling their certificates.

The tracking system records the certificate. The aggregator or broker helps monetize it.

4. The Aggregator Facilitates the Sale

Once SRECs are available, the aggregator can facilitate their sale based on the pricing structure selected by the owner.

Some providers offer exposure to spot-market pricing, where the value can change with current market conditions.

Others may offer fixed-price agreements for a specified period.

Some agreements may also provide an upfront payment in exchange for rights to future certificates.

Each structure transfers different levels of price risk between the solar owner and the buyer or aggregator.

5. You Receive Payment

After the SREC is sold according to the agreement, the solar owner receives payment after any applicable fees, commissions, spreads, or other contractual deductions.

Payment schedules can differ significantly.

One provider may issue payments shortly after each completed transaction, while another may pay monthly, quarterly, or according to another schedule.

The contract should explain this clearly.

Why Do Solar Owners Use SREC Aggregators?

Technically, participation through an aggregator is not always the only method available.

For example, PJM GATS offers a bulletin board through which certificate owners and potential buyers can connect and negotiate transactions directly.

However, managing SRECs independently means taking responsibility for the administrative and market-related work yourself.

An aggregator can reduce that workload.

Depending on the provider, aggregation services may include system onboarding, account setup, production tracking, certificate management, market transactions, certificate transfers, payment administration, contract management, and customer support.

The important phrase is depending on the provider.

Not every company offers the same level of service.

An inexpensive brokerage arrangement may provide only transaction support, while a full-service provider may combine SREC management with solar monitoring, asset management, and maintenance.

SREC Aggregator vs. SREC Broker: What Is the Difference?

The terms SREC aggregator and SREC broker are sometimes used interchangeably in the solar industry, but they can describe different roles.

An SREC aggregator generally manages certificates from multiple solar generators and may bundle or administer those certificates collectively.

An SREC broker generally focuses on helping buyers and sellers complete transactions.

In practice, one company may perform both functions.

PJM GATS, for example, maintains separate public listings for aggregators and brokers, demonstrating that the roles can be distinguished even though individual companies may provide overlapping services.

Instead of choosing a company based only on whether it calls itself a broker or aggregator, review what the company actually does.

How Do SREC Aggregators Make Money?

There is no single pricing model used by every SREC aggregator.

Some providers charge a percentage of the SREC sale price. Others may use a fixed transaction or management fee.

Another provider might purchase SRECs from system owners at an agreed price and resell them, earning money through the difference between purchase and resale prices.

Long-term and upfront agreements may use another economic structure entirely.

Before signing, determine both the visible fee and the actual amount you will receive for each SREC.

A contract saying there is "no brokerage fee" does not automatically mean the transaction has no economic cost. The provider may earn its margin through the price at which it buys and resells the certificate.

Transparency matters more than the label used for the fee.

Spot Market vs. Fixed-Price SREC Agreements

One of the most important choices when working with an SREC aggregator is how your certificates will be priced.

Spot-Market Pricing

With a spot-market arrangement, SRECs are generally sold based on prevailing market conditions.

The advantage is that owners may benefit when market prices rise.

The tradeoff is uncertainty.

SREC values can fluctuate because these markets are influenced by supply, demand, regulatory requirements, compliance obligations, and other factors. The District of Columbia Department of Energy & Environment, for example, explicitly notes that SREC values fluctuate based on supply and demand.

Fixed-Price Agreements

A fixed-price contract gives the solar owner an agreed price or pricing formula for a specified period.

That can make SREC revenue more predictable.

However, if market prices later increase significantly, the owner may continue receiving the contracted price instead of the higher market price.

Neither structure is automatically right for every solar owner.

The choice depends on whether predictable income or exposure to future market movements matters more to you.

How to Choose the Right SREC Aggregator

Choosing an aggregator should involve more than comparing the headline price displayed on a website.

Start by understanding exactly which responsibilities the provider will handle.

Find out whether the company manages system registration, production reporting, certificate creation, sales, payments, monitoring issues, and ownership transfers.

Then review how your SRECs will be priced.

Ask whether you receive the actual sale price minus a disclosed fee, a predetermined fixed price, or another amount determined by the agreement.

Contract length matters too.

A short-term arrangement offers more flexibility, while a longer agreement may provide pricing certainty but restrict your ability to change providers.

Also review termination provisions. Understand whether you can leave the agreement early, whether a fee applies, and what happens to certificates that have already been created but not sold.

Another important issue is property ownership.

If you sell a property with solar panels, determine whether the SREC agreement can be transferred to the new owner and what documentation will be required.

Finally, review reporting and payment transparency.

A good SREC management relationship should make it reasonably easy to understand how many certificates your system has generated, whether they have been sold, what price or contractual rate applies, what fees were deducted, and when payment will be issued.

What to Look for in an SREC Aggregator Contract

The contract is more important than the marketing page.

Read the agreement carefully to understand who owns the SRECs at each stage of the process.

Determine whether you are simply authorizing the aggregator to sell certificates on your behalf or transferring ownership rights under a broader agreement.

Check the pricing formula and all applicable fees.

Review the length of the agreement, renewal terms, early termination conditions, payment schedule, production-reporting responsibilities, monitoring requirements, and procedures for selling or transferring the property.

You should also understand what happens if the solar system stops reporting production correctly.

If an inverter loses its internet connection or a monitoring system fails, missing production data could delay certificate creation depending on the program and reporting method.

A full-service solar asset management provider may help identify these issues, while a transaction-only SREC platform may not monitor the physical system.

SREC Aggregators in the DC and PJM Markets

Location matters significantly in SREC markets because program rules are not identical across states or jurisdictions.

Washington, DC is one notable example.

The District's Renewable Portfolio Standard creates demand for qualifying SRECs, and DC's Department of Energy & Environment describes SRECs as a way eligible solar owners can earn money from the electricity their systems produce.

Systems seeking DC RPS eligibility must satisfy current District requirements. The DC Public Service Commission manages the renewable generator certification process and currently notes eligibility rules affected by the Renewable Energy Portfolio Standard Amendment Act of 2024, which took effect January 1, 2025.

Certificate tracking and market activity may also involve PJM GATS.

Because rules can change, solar owners should confirm current eligibility and registration requirements rather than assuming that installing a solar system automatically creates marketable DC SRECs.

Can You Sell SRECs Without an Aggregator?

In some markets, yes.

A solar owner may be able to maintain the appropriate tracking account, manage reporting, find a buyer, negotiate a price, transfer the certificates, and administer the transaction independently.

PJM GATS specifically provides a bulletin board where REC sellers and buyers can connect directly.

The question is therefore not simply whether you can sell SRECs yourself.

The better question is whether the additional administrative responsibility and market involvement are worthwhile for your situation.

For a homeowner generating a relatively small number of certificates each year, outsourcing the process may be attractive.

For a sophisticated commercial owner managing a large portfolio, direct market participation may deserve closer consideration.

Is an SREC Aggregator Worth It?

An SREC aggregator can be valuable when it removes administrative work, provides clear access to certificate markets, maintains accurate records, and offers transparent pricing.

But the value depends heavily on the agreement.

A provider offering a slightly higher advertised price may not necessarily be the better option if its contract has restrictive terms, unclear fees, limited support, or difficult transfer provisions.

Similarly, the lowest service fee does not automatically create the highest net return.

Evaluate the complete relationship: service scope, pricing method, fees, reporting, contract length, flexibility, payment timing, and support.

Final Thoughts

An SREC aggregator acts as the link between many solar system owners and the market where their renewable energy certificates can be managed and sold.

For solar owners who do not want to manage registration, certificate tracking, market transactions, and payments themselves, working with an aggregator can make SREC participation substantially easier.

However, convenience should not replace due diligence.

Before selecting an SREC partner, understand who controls your certificates, how the provider gets paid, how your SREC price is calculated, how long the agreement lasts, what happens if you sell your property, and exactly which administrative responsibilities the provider will manage.

The best arrangement is one you fully understand before the first certificate is sold.