For the uninitiated, Renewable Energy Certificates, or RECs, represent 1 MWh (megawatt-hour) of renewable power generated. Separate from the electricity itself, you can think of them as receipts used to claim the use of renewable power.
Created when producers generate electricity from sources like solar, wind, and geothermal heat, these certificates are then sold to buyers looking to demonstrate their renewable consumption. They are region-specific, with more granular specs like power source and recency, or vintage, determining price. The initial holder of a REC is the power producer, and they will market their RECs bundled with electricity or as standalone certificates. Buyers come from two camps: voluntary and compliance.
The latter refers to a regulatory framework outlining renewable energy targets and related penalties for electricity providers. For the sake of this discussion, we’ll zoom in on U.S. compliance schemes. Any mention herein of regulated power providers will technically refer to all Load-Serving Entities (LSEs) delivering power to end-users.
Compliance RECs buyers operate within state-level Renewable Portfolio Standard (RPS) regulations that require providers to produce or purchase X% of their power from renewable sources, with a corresponding fine for each MWh they fall short. A state’s fine, or Alternative Compliance Payment (ACP), informs the market price of its RPS RECs, as this is effectively their cost of compliance. Their caps on emissions typically decline annually, imposing increasing obligations until their targets are met. Today the majority of U.S. states including D.C. have implemented some form of clean energy standard.
Alternatively, RECs are sold on the voluntary market when they are not eligible or in demand for compliance. Voluntary buyers are either corporations looking to offset their footprint on paper or utilities offering opt-in green energy programs for their customers.
At a glance, a REC’s end use can appear removed from its ultimate environmental purpose. With a myopic focus on businesses’ claims to using renewable power that might have been physically delivered elsewhere, we can miss the forest for the trees and discount the groundwork that these REC purchases lay for sector expansion. The additionality of these certificates comes largely through their functional allocation of capital to competitive renewable alternatives.
.png)
The aforementioned RPS system obligates structural polluters to purchase certificates, in turn footing some of the bill for renewable projects. State standards have directed significant cash flow to developers, allowing them to maintain and grow their operations and contributing to improved financing terms across the industry. Of all the initiatives behind the U.S. energy transition, RPS has proven to be the movement’s talisman; according to the DOE’s Berkeley Lab, these programs alone have have driven almost half of all growth in domestic renewable power generation since the turn of the century.
Iowa was the first state to introduce an RPS back in 1983; last year, The Hawkeye State led the country in percentage of electricity from wind power with a remarkable 60+% share. Meanwhile, California, consistently a weather vane for renewables policy and related capital markets, set the national high-water mark with 32% of all power in the state coming from solar.
Looking at recent EIA data, wind and solar now account for about 20% of all power generated across the United States, with over 25% of our electricity coming from renewables on the whole. In 2025, solar output rose 34% year-on-year; this meteoric rise comes as related construction costs continue to drop and we see more favorable cost of capital conditions across a maturing industry. This year, developers are expected to add a further 43+ GW of utility-scale solar capacity to the national grid, which would represent a 60% increase from last year’s record additions.
While a meaningful revenue stream for renewable generators, RPS RECs today are not some manufactured financial buoy keeping renewable power afloat in an otherwise unmotivated market. Clean energy is no longer an expensive, far-fetched alternative to traditional power in this country.
The narrative against similar incentive programs often centers around their compliance costs ultimately being passed down to the consumer - regulated parties raise energy prices for customers to recover their losses on compliance. In the case of RECs, our large-scale adoption of renewables will actually yield lower price levels, and, in the meantime, the additional cost of RPS compliance only accounts for about 4% of retail electricity bills on average across regulating states.
While some East Coast states do experience costlier rate hikes, such examples tend to have particularly restrictive standards and already thin production of specific requisite RECs. These hardly serve as shining examples of a consumer-friendly model for larger rollout, and we’d do better to look west for inspiration; states like Texas, California, and Arizona continue to spearhead the transition with varying state-tailored approaches.
A REC-based approach has spurred and will continue to sustain the diversification of our domestic power resources. As vehicles of their larger RPS initiatives, they are largely responsible for delivering the economies of scale that renewables now enjoy.
Though voluntary and government-backed sustainable energy initiatives are well-founded, renewable power no longer relies on subsidies or benevolence to be a cost-competitive option. Looking at Lazard’s 2025 LCOE report on various power sources, the cost of new utility-scale solar today is below that of gas-fired plants - even after removing federal tax credits from the equation. Relative to their fossil counterparts, renewable projects offer quicker deployment and capture material savings on life-cycle construction and O&M costs.
.png)
As investment commitment has snowballed, the costs to both build renewable generation facilities and store their electricity have declined consistently. IRENA’s 2024 report highlighted a 93% decrease in the cost of Battery Electric Storage Systems (BESS) since 2010. This increased scalability is vital for attractively priced renewables and is inextricably linked to clean energy mandates across the country. RPS programs have been vital in pushing through the initial scaling period for BESS and renewables infrastructure, where investment appetite would have otherwise stagnated.
Solar projects dominate new generation facility builds, with construction of BESS keeping impressive pace to meet capacity demand. These systems are often stacked onto a solar facility and allow for opportunistic power caching during peak hours for distribution later in the day. Of the 53GW of electric capacity added in 2025, U.S. developers set a record with 15MW from new battery storage, and they are not stopping there. In a year where we expect an unprecedented 86GW of new capacity to be added, BESS is projected to contribute 24GW. That figure would represent over half of all U.S. battery capacity added over the previous five years.
Keep in mind that capacity does not mean storage, rather it refers to electricity ready for immediate distribution. In fact, when paired with a power source, BESS only holds electricity for a few hours at most - this is not a case of saving up solar power in batteries to be called on in the winter months. Instead, its real value is the ability to smooth the intra-day power curve. While daily solar generation follows the normal bell curve of the sun’s path in the sky, peaking around midday, the demand curve for power consumption is more duck-shaped:
Solar is considered an “intermittent” source of electricity, whereas natural gas and coal plants are known as “dispatchable,” on call to send out power regardless of weather conditions. Solar in tandem with BESS effectively becomes dispatchable for as long as the battery holds its charge, as opposed to relying on concurrent sunshine. Allowing solar to take advantage of midday generation peaks and delay delivery helps to meet demand as it spikes in the early evening. The expensive process of running gas-fired peaker plants to meet demand is mitigated when there is cheap electricity from renewables already on hand.
Lessening the daily stress on our dispatchable power supply effectively flattens the extremes at either end of the pricing curve, offering both certainty to providers and affordability to consumers. Expanding solar power and BESS infrastructure are two factors in a larger solution to the damaging environmental and market impacts of the United States’ precarious over-dependence on fossil fuels.
Thanks to states’ unwavering commitment to energy standards through REC frameworks, we find ourselves at a jumping off point for renewables in this country. The exciting projections for continued investment tell clear story: the developers leading this charge already have faith enough to take that leap. The coming positive environmental and market outcomes will only amplify the call to action.
Fossil-based power will always be at the whim of market risk in a way that renewable sources such as solar are not. When comparing the supply and price stability that prospective power sources offer, a source like solar simply has no marginal fuel cost to consider. Even as the world’s leading producer and exporter of natural gas, the United States’ domestic market is far from insulated from global energy supply shocks, including the ongoing case-in-point example in the Middle East. Meanwhile, stateside, we find the U.S. in the throes of a mad dash for data center power supply.
Amid this environment of heightened global supply disruptions coupled with domestic demand pressure, sustainable energy does not come to the table with its hands out, but instead with an actionable roadmap toward cheaper, more reliable energy. In this pivotal moment for global energy supply chains, the merit of renewable energy can stand alone, apart from sustainability arguments. Factoring in said environmental benefits in the long-run presents a remarkably sound case for renewables today. We must recognize the viability of these alternatives and accept the urgency of diversifying our resource portfolio. Renewable power’s role alongside fossil fuels will continue to grow, safeguarding domestic industry from input volatility and protecting American households from further drains on their purchasing power.