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Glossary · Energy industry & energy transition

Corporate PPA

Corporate PPA PPA electricity procurement Green power company renewable energies Guarantees of origin electricity market

A corporate PPA is a long-term power supply or power purchase agreement between a company and an electricity generator. It usually concerns electricity from wind or solar plants. The company purchases it over several years on terms agreed in advance; typical terms are around 5 to 15 years. PPA stands for Power Purchase Agreement. EU law refers to such contracts in German as Strombezugsverträge (power purchase agreements). It defines them as contracts under which a natural or legal person agrees to purchase electricity from an electricity producer on a market basis. The addition "Corporate" is not a legal term. In practice it indicates that a company outside the energy sector acts as the buyer. This differs from PPAs in which an energy supplier or trader takes the electricity (often called a "utility PPA").

A corporate PPA combines two interests that come together only to a limited extent in the short-term electricity market. The plant operator wants predictable revenues so that the construction, financing or continued operation of a plant becomes economically viable. The company wants to hedge its electricity costs, align its procurement with renewable energy, or meet requirements for carbon accounting and reporting. The contract therefore regulates far more than a price. This includes term, volume, delivery profile, guarantees of origin, balancing group responsibility, balancing energy, settlement and collateral. It also covers the handling of deviations between generation and consumption, of curtailment and of negative prices.

Contract types: physical, sleeved, virtual

In a physical corporate PPA, the electricity is delivered, in balancing terms, from the generator to the company. If the plant is located on the company's premises or directly next to them, this is called an on-site PPA. More common is the off-site PPA: the plant is located elsewhere and the electricity flows through the public grid. In the electricity system, a delivery consists of more than a contract under civil law. The electricity must be allocated to a balancing group, forecast and settled. If the values deviate, this must be balanced out. These tasks are often performed by an energy supplier or direct marketer. It also supplies the residual electricity that the plant does not cover. This variant is called a sleeved PPA.

In a financial or virtual corporate PPA, no electricity is delivered to the company. The generator sells its electricity on the market. The company continues to buy its electricity from its supplier. Both sides agree on a fixed reference price and settle the difference from the market price in cash. If the market price is below the reference price, the company pays the difference to the generator. If it is above, the generator pays the company. Economically, this corresponds to a contract for difference. The link to renewable generation arises through the financial settlement and usually through the transfer of guarantees of origin. Because a virtual PPA resembles a financial derivative, companies should examine in each individual case how it is accounted for and classified under financial supervisory law.

Distinction from electricity supply contract, guarantee of origin and direct marketing

An ordinary electricity supply contract can also declare renewable electricity. However, it does not have to include a long-term commitment to a specific plant or a specific plant portfolio. In a corporate PPA, precisely this allocation between a buyer and a specific generation source is the focus. It can stabilize a project's revenues over many years and thereby influence investment decisions.

A corporate PPA is also not the same as a guarantee of origin. In Germany, the Federal Environment Agency (Umweltbundesamt) issues guarantees of origin electronically, with each certificate covering one megawatt hour. It transfers and cancels them. Legally, they serve to demonstrate the renewable share to final consumers within the framework of electricity labelling. A guarantee of origin says nothing about whether a new plant was financed, who bears the price risks, or whether generation matches consumption in time. Companies can also buy guarantees of origin without a PPA. Conversely, a PPA loses its value as evidence of green electricity if the certificates are not also transferred and cancelled for the company.

The corporate PPA differs from direct marketing in the role of the buyer. In direct marketing, a plant operator sells its electricity on the market via a direct marketer. In a corporate PPA, a specific company is the long-term contractual partner or economic counterparty. The two can be combined. A direct marketer then takes over, for example, balancing and marketing, while the PPA hedges the revenues.

Legal framework in the EU and Germany (as of November 2026)

At EU level, the reform of the electricity market design inserted a separate chapter on investment incentives into the Internal Electricity Market Regulation. It is based on Regulation (EU) 2024/1747 and has applied since July 2024. Under Article 19a, Member States must promote the uptake of power purchase agreements. To that end, they are to remove unjustified barriers as well as disproportionate or discriminatory procedures and charges. Instruments provided for include guarantee schemes and the pooling of demand. When adopting new measures, Member States are to take existing and future PPAs into account. These obligations are addressed to the Member States. They do not give rise to direct contractual rules for individual companies.

In Germany, the relationship to EEG support is particularly important. The EEG 2023 regulates this in § 79 and § 80. The Federal Environment Agency issues guarantees of origin only for electricity for which no payment under § 19 or § 50 EEG is claimed. This concerns above all the market premium and the feed-in tariff. Conversely, the prohibition of double marketing excludes EEG payment for electricity whose guarantee of origin is passed on. A corporate PPA with a green electricity certificate therefore generally concerns electricity volumes that are not supported under the EEG. These are, for example, new plants without support or plants after the end of their support. For supported electricity, there is a separate, more limited instrument in the form of regional certificates under § 79a.

Price hedging and allocation of risk

The economic significance of a corporate PPA lies in the allocation of price, volume and profile risks. A fixed contract price protects the company against rising wholesale prices. If market prices fall significantly below the contract price, however, it pays more than on the market. For the generator, the contract works in mirror image: it is hedged against low prices but hardly benefits from price peaks. Because of the long term, the counterparty's default risk also plays a role. The parties therefore often require collateral or set a minimum creditworthiness.

The delivery profile is equally important. Wind and solar plants generate unevenly, while companies consume according to their own load profile. A solar PPA delivers a lot of electricity at midday. If production also continues in the evening and at night, a gap remains that must be closed through the market, the supplier or flexibility. At midday, on the other hand, there may be surpluses that the company must sell, possibly at low or even negative electricity prices. This profile risk shows that an annual electricity volume says little about supply at a given point in time. Terms such as residual load describe what then has to be covered by other sources.

  • Pay-as-produced: The company takes the actual generation of the plant and thus bears more of the volume and profile risk.

  • Baseload or fixed volume: The company receives, in balancing terms, a constant or contractually fixed volume. The seller or a service provider reshapes the fluctuating generation profile accordingly. This costs a premium, because shortfalls must be purchased and surpluses sold.

  • Hybrid or profiled structures: Wind and solar, in some cases with storage, are combined so that the profile fits consumption better. The more closely the PPA is meant to follow consumption, the more important forecasting, trading, storage and balancing energy become.

Additionality and credibility

Corporate PPAs are often linked to the additional expansion of renewable energy. This is possible, but not automatically the case. A contract can make a new plant financeable if banks regard the long-term revenues as reliable. This applies particularly to projects without state support. For existing plants, a PPA can secure continued operation, but does not necessarily prove additional generation. Anyone who wants to assess additionality must examine plant age, support status, timing of the investment decision, term and market area. The designation as a PPA does not replace this examination.

Temporal and geographical matching is also gaining weight. Many companies have so far accounted for green electricity on an annual basis. In calculation terms, they can thereby cover their entire annual consumption, even though generation and consumption diverge in many hours. The GHG Protocol's Scope 2 Guidance of 2015 requires only that certificates be as close in time to consumption "as possible" and originate from the same market. It forms the basis of market-based Scope 2 accounting. In the ongoing revision, two stricter requirements were proposed and publicly consulted on: hourly matching for larger reporting entities and proof that the electricity can physically be delivered to the consumption grid. Smaller organizations are to receive exemptions and transitional rules. For PPAs, this would mean that profile, location and data quality would become significantly more important for the carbon footprint.

Significance for companies and the electricity system

For energy-intensive companies, a corporate PPA can be one building block of electricity procurement. However, it rarely replaces the entire procurement strategy. Combinations with forward market products, short-term purchasing, self-supply and flexibility options are common. The PPA share must fit the consumption profile, the risk-bearing capacity and the accounting rules.

For generators, corporate PPAs reduce dependence on short-term market prices. In a system with a large share of weather-dependent generation, this is significant, because the market values of wind and solar power fall when many plants feed in at the same time. Long-term contracts stabilize revenues but do not remove risks from the system. They merely allocate them to particular contractual partners. Anyone who underestimates profile risks, balancing energy costs or the need for collateral regards PPA prices as cheaper than they are economically.

Corporate PPAs make companies active players in the energy transition. In doing so, they take on tasks that previously lay mainly with utilities: price hedging, assessment of origin, risk management and matching consumption and generation. Grid expansion, balancing rules, certificate systems and security of supply, by contrast, remain jointly organized tasks. A corporate PPA is therefore neither a mere green electricity label nor a guarantee of a fully renewable supply. How much it achieves depends on whether it enables real investments, allocates risks properly and discloses the gap between annual volume and hourly supply.

Sources

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Edited by eCMS on 11.11.2026 18:05

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