Until just 15 years ago, renewable energy contracts were a relatively marginal resource. However, the significant drop in the costs of renewable technologies, especially solar and wind, along with growing concerns about climate change and public and private policies promoting the use of clean energy, have positioned renewable power purchase agreements (PPAs) as a key pillar for the global development of clean technologies.
Renewable PPAs are contractual agreements between renewable energy providers and buyers, which can be companies, institutions or even individuals.
Today, accessing clean energy is easier than ever, thanks to the wide range of contractual structures available. These agreements are now common practice in corporate sustainability strategies, even for companies that are not yet part of initiatives like RE100 .
It is an undeniable fact that renewable energy projects are increasingly dependent on corporate demand to ensure their viability. While public policies are playing a crucial role, they are not enough on their own to sustain the necessary growth and meet the ambitious decarbonization goals we have set for ourselves as a society.
The active participation of the private sector, driven by sustainability commitments and the need to reduce long-term operating costs, is proving fundamental to accelerating the energy transition and ensuring that renewable projects are developed at the required scale.
The Growth of the Renewable PPAs Market
The renewable energy PPA market has experienced explosive growth in recent years. According to BloombergNEF ’s 1H 2024 Corporate Energy Market Outlook , corporations signed a record 46 gigawatts (GW) of renewable energy contracts in 2023 (Figure 1), a 12% increase over the previous period. More than 200 corporations, including Amazon (8.8 GW), Meta (3 GW), and Google (1 GW), led this movement (Figure 2).
Since 2008, corporations have contracted 198 GW of clean energy through these PPAs, exceeding the total electricity generation capacity of countries like France, the United Kingdom, or South Korea. For the fourth consecutive year, Amazon has solidified its position as the world’s largest purchaser of clean energy. This growth is undoubtedly a clear sign of the renewable energy sector’s maturity.
On average, the Renewable PPAs market has grown 33% since 2015 and has catalyzed hundreds of billions of dollars of investment in the energy transition, marking the seventh consecutive year that the Renewable PPAs market has reached a new high.
Benefits of Renewable PPAs
Renewable PPAs not only promote the use of clean energy sources, but also offer significant advantages for both consumers and the environment, helping to pave the way for a more sustainable and resilient energy future.
For consumers:
- Stable prices: Renewable energy, not being dependent on the volatility of fossil fuel markets, offers more predictable and stable prices in the long term, without the adjustments resulting from fluctuations in commodity prices such as natural gas or petroleum products. This protects consumers from market swings and offers greater financial certainty.
- Decarbonization: By committing to renewable PPAs, consumers reduce their carbon footprint, directly contributing to global climate change mitigation goals, and improving their reputation in terms of sustainability.
- Energy security and independence: By contributing to the diversification of energy sources, renewable PPAs reduce dependence on imported fossil fuels, strengthening energy security and decreasing vulnerability to disruptions in global energy supplies.
- Economic benefits: Investment in renewable energy creates jobs and fosters local economic growth. According to figures from the International Renewable Energy Agency (IRENA) , every million dollars invested in clean technologies creates between 3 and 9 jobs, far exceeding the 1 to 3 jobs generated by the same investment in fossil fuels. Furthermore, Power Purchase Agreements (PPAs) allow companies to reduce their long-term energy costs, improving their competitiveness.
- Social responsibility: Renewable PPAs are a key tool for corporations to demonstrate their commitment to sustainability and social responsibility. By integrating these agreements into their operations, organizations not only meet their environmental objectives but also respond to the expectations of their stakeholders, including investors, customers, and employees.
- Technological innovation: The adoption of PPAs, especially “24/7 Carbon Free PPAs” (which guarantee clean energy at all times), drives innovation in the development of advanced technologies, such as energy storage, flexibility solutions and demand management, helping to optimize the use of renewable energy.
For the environment:
- Reduction of greenhouse gas emissions: Renewable energy sources, such as solar and wind power, do not emit greenhouse gases during their operation, which contributes significantly to the reduction of global emissions and the fight against global warming.
- Improved air quality: Unlike fossil fuel power plants, renewable energy sources do not emit air pollutants that affect human health, such as sulfur dioxide or particulate matter. This results in a direct improvement in air quality, with benefits for public health and a reduction in respiratory illnesses.
- Conservation of natural resources: Renewable energy is generated from natural sources that are virtually inexhaustible, such as the sun, wind, and water. By using these resources, pressure on non-renewable resources, such as oil and gas, is reduced, preserving the environment for future generations.
- Ecosystem protection: By reducing the need for fossil fuel extraction and combustion, renewable PPAs also decrease the associated environmental impact, protecting ecosystems, biodiversity, and water sources.
Types of Renewable PPAs
Renewable PPAs have evolved to meet the growing demands of energy systems undergoing a transition to sustainability. Today, these contracts can be grouped into two main categories: (1) PPAs with Guarantees of Origin and (2) 24/7 Carbon-Free PPAs.
1. PPAs with guarantee of origin
Currently, Power Purchase Agreements (PPAs) with guarantees of origin are widely used by corporations that have the capacity to purchase energy directly from renewable energy providers. These contracts allow consumers to demonstrate their commitment to sustainability, as their electricity purchases are backed by renewable energy certified through Renewable Energy Certificates (CERs) issued by independent bodies.
These certificates verify that the energy equivalent to the amount specified in the contract has been generated from renewable sources. However, it is important to clarify that, while these certificates guarantee that a certain amount of clean energy has been injected into the grid, they do not ensure that the energy consumed in real time by the customer comes exclusively from renewable sources.
Under this scheme, consumers commonly adopt an annual matching approach , balancing their total electricity consumption with their renewable energy purchases over the course of a year. While this approach is valuable for incentivizing investment in renewable projects and offsetting supply and demand variability, it does not guarantee that the energy consumed will be 100% clean at all times.
Power Purchase Agreements (PPAs) with guarantees of origin offer significant flexibility. Consumers can meet their commitments by directly purchasing electricity from renewable projects, acquiring renewable energy certificates, or a combination of both. This scheme has been crucial in increasing demand for clean energy, but it does not necessarily achieve the goal of a completely carbon-free electricity supply at all times.
2. 24/7 Carbon-Free Energy PPAs
Historically, the intermittency of renewable energy sources has been compensated for by conventional sources, such as natural gas or petroleum products, to ensure the stability of the electricity supply. However, this practice, while common in electrical systems for technical and economic reasons, contradicts the objectives of decarbonization and the transition to carbon-free energy mixes.
In this context, 24/7 Carbon-Free Energy PPAs are gaining prominence as an innovative solution available to corporations seeking to further their decarbonization efforts. These contracts aim to eliminate dependence on fossil fuels, maximize the use of renewable energy, and guarantee an uninterrupted supply of clean energy, aligned in real time with consumer demand.
The key to these PPAs is to align electricity generation and consumption 24/7, promoting the necessary infrastructure to support a zero-emission energy supply year-round. In doing so, they drive new market practices and innovation that encourage a drastic reduction in emissions in the electricity sector, ensuring a continuous and sustainable supply.
However, the mass adoption of 24/7 Carbon-Free PPAs faces several challenges:
- Intermittency of renewable energy: The production of renewable energy, such as solar and wind, is inherently intermittent, making it difficult to guarantee a continuous electricity supply. During periods of low generation (nighttime for solar or windless days for wind), 24/7 PPAs must integrate energy storage (batteries) or combine multiple renewable sources to ensure a constant flow of energy. This entails additional costs and the need for advanced technological solutions to manage variability.
- Lack of smart meters: Smart meters are essential for consumers to measure and monitor their hourly consumption in real time, which is critical for aligning renewable energy supply with demand. Without these devices, it is impossible to obtain accurate data on when and how much energy the customer is using, limiting the effective implementation of 24/7 PPAs. The mass installation of these meters in different markets is costly and requires upgrades to the grid infrastructure.
- Energy storage infrastructure: As mentioned earlier, to cover times when renewable energy is unavailable, a robust energy storage infrastructure is typically required, such as large battery systems or emerging technologies like green hydrogen storage. However, current storage costs and capacity are insufficient to support widespread adoption of 24/7 contracts. This necessitates significant investment in technology and development.
- Energy monitoring and traceability systems: The lack of efficient systems to accurately track renewable energy is a critical challenge. Consumers and suppliers need tools to verify that the energy consumed in real time comes from renewable sources and has not been double-counted. Double counting or a lack of transparency in renewable energy certificates can undermine trust in the system and its integrity.
- High upfront costs: 24/7 Carbon-Free PPAs require significant investment in infrastructure, technology, and management. Companies must be prepared to bear these upfront costs to build or access sufficient renewable energy sources, energy storage, advanced monitoring systems, and more. For many companies, especially in emerging markets, these costs can be prohibitive, limiting the adoption of these contracts.
- Regulatory and normative challenges: In many countries, energy regulations and policies are not fully adapted to the specific requirements of 24/7 Carbon-Free PPAs. Energy markets must evolve to facilitate the integration of continuous renewable energy, adjusting their rules and policies to promote innovation in these types of contracts. This includes appropriate incentives, compensation mechanisms, and energy traceability standards.
- Development of new technologies: While solutions to support 24/7 PPAs already exist, such as energy storage technologies and advanced demand management systems, many are still in early stages of development or too expensive for large-scale implementation. Continued innovation and cost reductions in key technologies, such as long-life batteries and green hydrogen, are essential for the widespread adoption of these PPAs.
- Variability in regional conditions: The viability of 24/7 PPAs depends heavily on the specific characteristics of each region, including the availability of renewable resources, existing energy infrastructure, and local energy policies. In regions with low solar irradiance or limited wind resources, it may be more difficult to implement these contracts without relying on large-scale storage or other complementary technologies.
Success Stories “24/7 Carbon-Free PPAs”: Google and The AES Corporation
The first contract of this kind was announced by The AES Corporation and Google in September 2020, with the goal of operating their data centers and offices worldwide on carbon-free energy, every hour, every day, by 2030. This pioneering agreement set a precedent for the industry and demonstrated the viability of large-scale 24/7 PPAs.
Following the success of the agreement, other companies such as Microsoft and Iron Mountain gradually followed suit, causing a domino effect in the industry, which has boosted the adoption of renewable energy by companies in various sectors.
One of the key aspects to the success of this solution was the combination of multiple renewable energy sources. This involved integrating technologies such as solar, wind, and hydroelectric power, as well as, in some cases, energy storage systems like batteries. Furthermore, advanced energy management and data analytics technologies were incorporated, enabling the prediction and optimization of the energy supply and demand balance in real time.
3. Virtual PPAs (“Virtual PPAs”)
One emerging solution for regulated and captive customer segments is the Virtual PPA , also known as a PPA without physical compensation . This type of financial contract allows companies to support the development of renewable energy generation projects without requiring the energy to be physically delivered to their facilities. Its main characteristics are:
- Alignment with Sustainability Goals : These contracts are gaining popularity among companies seeking to meet their sustainability goals and reduce their carbon footprint, but are unable to purchase energy directly from a renewable energy provider and have limitations in developing their own generation facilities.
- Geographic Flexibility : Virtual PPAs allow companies to purchase renewable energy from projects located in different regions or countries, without requiring physical delivery to their location. This is especially useful for companies with operations in multiple locations and widely dispersed consumption that cannot be aggregated under current regulations as a single consumption.
- Support for Renewable Energy : Virtual PPAs allow for the financing of renewable energy projects, as they ensure developers a predictable revenue stream, making investment in new renewable energy facilities increasingly attractive.
- Financial Compensation : Instead of receiving energy directly, the buyer and seller agree on a fixed price per MWh of energy. The difference between this price and the wholesale electricity market price is settled in cash, like any other financial instrument.
Conclusion
Renewable PPAs have evolved from a marginal option to a fundamental driver of the global energy transition. The convergence of factors such as the decreasing costs of renewable technologies, growing concerns about climate change, and supportive public policies has fueled widespread adoption of these contracts by companies across various sectors.
These PPAs offer a range of benefits for both buyers and the environment, including stable prices, a reduced carbon footprint, greater energy security, and incentives for technological innovation. However, the complexity and diversity of PPAs, from traditional ones with guaranteed origin to innovative 24/7 carbon-free and virtual options, presents a dynamic and constantly evolving landscape.
However, the future of these PPAs is even more promising. A horizon is emerging where these contracts will become increasingly sophisticated, integrating technologies such as artificial intelligence and blockchain to optimize energy management and ensure transparency in transactions. Furthermore, the growing importance of electrification in various sectors, from transportation to industry, will drive greater demand for renewable energy and, consequently, for these PPAs.
Carbon-free 24/7 PPAs are likely to become the norm in many sectors, especially as the necessary infrastructure to ensure a continuous supply of clean energy is developed. Furthermore, the increasing participation of new players, such as local energy communities and cities, in contract markets will democratize access to renewable energy and strengthen local markets.
In conclusion, renewable PPAs are becoming established as a strategic tool for companies seeking to reduce their carbon footprint and contribute to a more sustainable energy future. As the demand for clean energy continues to grow, these contracts are expected to continue evolving and playing an increasingly important role in the transformation of global energy systems.
The future of energy is in our hands. Renewable Electricity Contracts are a crucial step towards a more sustainable future for all.
References
EPA Webinar Series: 24/7 Hourly Matching – Webinar 2, The Corporate Experience
https://www.epa.gov/greenpower/epa-webinar-series-247-hourly-matching-webinar-2-corporate-experience
Why PPAs are popular procurement options for corporate and industrial buyers
Corporate Clean Power Buying Grew 12% to New Record in 2023, According to BloombergNEF