Source - PPAs Explained (Next Kraftwerke)
Explainer article on Power Purchase Agreements: types, advantages, disadvantages, and market context. Published by Next Kraftwerke (Belgian branch), an electricity trader and aggregator operating virtual power plants across Europe.
Document metadata
- Title: “PPAs explained: types of Power Purchase Agreements, their advantages and disadvantages”
- Source: https://www.next-kraftwerke.be/knowledge-hub/ppa-power-purchase-agreement
- Author: Next Kraftwerke BE
- Published: (undated)
- Raw file:
Raw/Clippings/PPAs explained - Power Purchase Agreements, their advantages and disadvantages and why they are on the rise.md
Summary
The article provides a clear typology of PPAs and explains why they are growing in commercial use. It covers the perspective of both generators (seeking revenue certainty for capital-intensive renewable projects) and large consumers (seeking stable, green electricity prices). Being authored by an electricity trader, the content is commercially oriented but technically accurate.
PPA definition
A Power Purchase Agreement (PPA) is a power offtake agreement between a (green) electricity producer and a consumer or trader. It includes: amount of electricity, negotiated price, risk allocation, accounting requirements, and penalty clauses. As a bilateral agreement, it is highly customizable. PPAs are generally long-term (10–15 years), providing stable revenue for high-CAPEX/low-OPEX renewables investments and insulation from market price volatility.
This aligns closely with the EU legal definition added by Regulation 2024/1747, Art. 2(77): “a contract under which a natural or legal person agrees to purchase electricity from an electricity producer on a market basis.”
PPA typology
By buyer type
| Type | Description |
|---|---|
| Corporate PPA | Bilateral agreement between renewable generator and a (large/industrial) consumer |
| Merchant PPA | Agreement with an electricity trader who resells into the market or to a specific consumer |
Corporate PPAs are growing internationally, driven by companies (Google, Apple, etc.) seeking price certainty and green credibility. Main barrier in smaller markets: 10–15 year duration is long for corporate procurement cycles.
By physical delivery mechanism
| Type | Delivery | Grid involvement | Notes |
|---|---|---|---|
| On-site PPA | Direct, behind the meter | No public grid | Producer on customer premises or direct line; avoids grid costs and energy taxes; always a Corporate PPA |
| Off-site PPA | Via public grid | Yes — balance group settlement required | Fixed price; plant can be distant; Guarantees of Origin transferred to customer |
| Sleeved PPA | Off-site with intermediary | Yes — intermediary handles balancing, portfolio management, risk | Energy service provider takes balancing responsibility; absorbs profile/imbalance/credit risks |
| Virtual/synthetic PPA | Financial only — no physical delivery | Electricity traded separately (e.g., EPEX spot) | Uses a Contract for Difference structure — both parties settle at market price and pay/receive the difference to/from the agreed strike price |
Virtual/synthetic PPA mechanism
The synthetic PPA decouples electricity flow from the financial agreement:
- Generator’s energy service provider sells electricity at market (spot) price
- Consumer’s supplier buys a matching profile at market price
- A Contract for Difference (CfD) between the two PPA parties compensates for the difference between spot and the agreed strike price
Result: both parties effectively pay/receive the agreed PPA price regardless of spot price movements, achieving price certainty without physical delivery. The CfD structure is simpler administratively and does not require direct balance group connections between the parties.
Advantages of PPAs
- Risk reduction: removes energy price volatility risk for high-CAPEX/low-OPEX projects; enables debt financing for renewable development
- Revenue certainty: banks often require a PPA from a creditworthy offtaker as a condition for project financing
- Green credibility: physical PPAs with Guarantees of Origin enable consumers to demonstrate renewable procurement
- Flexibility: contracts can be structured with fixed prices, variable prices, or partial market exposure
Disadvantages of PPAs
- Complexity: negotiation is time-intensive; primarily accessible to large companies with legal/procurement capacity
- Long duration risk: 10–15 year lock-in; if prices move significantly, either producer or consumer is adversely affected
- Volume/profile risk: variable renewable output means the contracted volume may not always be available; someone must handle the residual (financially or physically)
Market context
Corporate PPAs are increasingly common globally. Standard examples include Google/Apple renewable data center contracts, and Belgian examples such as Google-Engie offshore wind. Growth is driven by:
- Corporate sustainability commitments requiring renewable electricity
- Merchant revenue uncertainty increasing as subsidy schemes end
- Art. 19a–19b of Regulation 2024/1747 requiring member states to remove PPA barriers and ensure guarantee schemes for buyer-default risk
Relevance to wiki topics
- Power Purchase Agreement: this source provides the primary detailed typology for the PPA concept page
- Electricity Market Design Reform 2024: PPAs are a central instrument in the 2024 reform’s investor support framework
- Flexibility: synthetic PPAs using CfD structures create price stability that enables renewable investment — the revenue base for flexibility-providing assets