Legal Structure of REIPPPP Procurement Rounds in South Africa

The Renewable Energy Independent Power Producer Procurement Programme (REIPPPP) is South Africa’s principal competitive procurement framework for obtaining electricity from privately developed renewable-energy projects. It was introduced in 2011 and is structured around successive Bid Windows, each governed by a Ministerial Determination, an official Request for Proposals (RFP), evaluation rules, regulatory approvals and project agreements. The Department of Electricity and Energy continues to administer the programme through the IPP Office, with Bid Window 7 being the latest major renewable-energy round. (Department of Employment and Labor)

1. Statutory foundation

The principal legal foundation is the Electricity Regulation Act 4 of 2006 (ERA), particularly section 34. Section 34 enables the Minister, in consultation with the National Energy Regulator of South Africa (NERSA), to determine that new generation capacity is required and to specify matters such as the electricity source, technology, procurer and other procurement conditions.

The Electricity Regulations on New Generation Capacity, 2011, provide the procedural framework for procuring electricity from independent power producers. The regulations recognise an IPP procurement programme as a process for procuring new generation capacity from IPPs. (Acts Online)

A further constitutional foundation is section 217 of the Constitution, which requires organs of state and specified public entities, when contracting for goods or services, to use a procurement system that is fair, equitable, transparent, competitive and cost-effective. The Preferential Procurement Policy Framework Act 5 of 2000 gives legislative effect to the constitutional preferential-procurement framework. (Government of South Africa)

2. Ministerial Determination

A REIPPPP round normally begins with a Ministerial Determination identifying the generation capacity that government intends to procure.

The Determination is important because it provides the legal and policy authority for the procurement exercise. For example, Bid Window 6 followed the relevant Ministerial Determination and initially contemplated 4,200 MW, consisting of 3,200 MW of wind and 1,000 MW of solar PV. (Government of South Africa)

The Determination therefore performs a gatekeeping function:

establishes the need for additional generation;

identifies eligible technologies;

determines the amount of capacity;

identifies the procuring authority;

establishes the basis for the subsequent RFP.

3. Request for Proposals

The RFP is the central contractual and procedural document of each Bid Window.

It establishes the rules under which private developers compete. It normally specifies:

qualification requirements;

project-location requirements;

grid-connection requirements;

bid-security requirements;

technical criteria;

financial criteria;

economic-development obligations;

pricing methodology;

bid validity;

deadlines;

preferred-bidder conditions;

requirements for financial close; and

the project agreements to be executed.

The 2025 Engie-Pele Sannaspos Solar PV Consortium case is particularly useful because the court explained that the RFP constituted a formal invitation for bidders to submit responses and established the rules for participation and assessment; it was not itself an offer by the Department to contract with every bidder. (SAFLII)

4. Bid submission and qualification

The procurement process operates through successive Bid Windows rather than a single permanent tender.

Historically, the process included:

Bid notification → registration → bid submission → evaluation → preferred-bidder announcement → project agreements.

This structure was expressly described by the High Court in Coal Transporters Forum v Eskom Holdings Ltd and Others [2019] ZAGPPHC 76. (SheriaHub)

The evaluation generally has two principal dimensions:

First, threshold/qualification evaluation.
The bidder must demonstrate compliance with prescribed legal, technical, financial and project requirements.

Second, competitive evaluation.
Qualifying bids are assessed against the criteria specified in the relevant RFP, particularly price and economic-development commitments.

In the earlier REIPPPP rounds considered in Coal Transporters Forum, price represented 70 points and economic-development commitments 30 points. The latter included matters such as employment, local content, black ownership, management control, preferential procurement, enterprise development and socio-economic development. (SheriaHub)

The precise weighting can change between Bid Windows, so the RFP applicable to the particular round is legally decisive.

5. Preferred-bidder status

A successful bidder does not necessarily obtain an immediately unconditional right to construct and operate the project.

Instead, the Department identifies Preferred Bidders. They must then satisfy further conditions before reaching commercial and financial close.

For example, in Bid Window 7, 48 bids representing more than 10.2 GW were submitted against a programme designed to procure up to 5,000 MW. After evaluation, eight Solar PV projects representing 1,760 MW were initially appointed as Preferred Bidders, with further compliant projects subsequently considered. (Government of South Africa)

This demonstrates an important legal distinction:

submission of a bid ≠ qualification ≠ preferred-bidder appointment ≠ commercial close ≠ financial close ≠ commercial operation.

6. Power Purchase Agreement

Following successful procurement, the IPP normally enters into a long-term Power Purchase Agreement (PPA) with Eskom.

The PPA regulates the sale and purchase of electricity and establishes matters such as:

contracted capacity;

tariff;

payment;

performance obligations;

operational requirements;

default;

termination;

force majeure;

dispute resolution; and

the contractual term.

The REIPPPP model has generally used long-term PPAs. In Greenstreet 1 (Pty) Ltd v Solar Capital de Aar 3 (RF) (Pty) Ltd [2021] ZACT 4, the Competition Tribunal recorded that the relevant IPPs had 20-year PPAs with Eskom and that important commercial variables such as price and contracted volumes were fixed through the competitive procurement process. (SAFLII)

7. Implementation Agreement

The second important project document is the Implementation Agreement (IA) between government and the project company.

The IA gives legal effect to commitments made by the bidder concerning matters such as:

economic development;

local employment;

supplier development;

enterprise development;

socio-economic development; and

other obligations imposed by the relevant procurement round.

Government has expressly described the PPA as governing the sale of electricity between the IPP and Eskom, while the IA incorporates commitments made by the bidder concerning economic and socio-economic development. (Government of South Africa)

8. Grid connection and Eskom's role

Grid connection is another major component of the legal structure.

An IPP must comply with applicable grid-connection requirements and obtain the necessary regulatory approvals. Eskom has historically played several roles in the REIPPPP structure, including purchaser of electricity and transmission/grid-interface participant.

This creates an important separation between:

procurement law → electricity regulation → grid regulation → contractual law.

A project may therefore be successful in the procurement round but still encounter difficulties in reaching commercial close because of grid-access, transmission or other project conditions. Government has specifically identified grid-access challenges as affecting some Bid Window 6 projects. (Government of South Africa)

9. Financial close and commercial operation

After preferred-bidder appointment, the project must satisfy the conditions necessary for commercial close and financial close.

The traditional REIPPPP structure therefore proceeds approximately as follows:

Ministerial Determination
↓
RFP / Bid Window
↓
Bid submission
↓
Technical and legal qualification
↓
Financial/economic-development evaluation
↓
Preferred Bidder
↓
PPA + Implementation Agreement
↓
Financial Close
↓
Construction
↓
Commercial Operation Date

The government's earlier description of the programme similarly identifies signing of the IA and PPA, followed by financing and satisfaction of contractual conditions, construction and commercial operation. (Government of South Africa)

Important Case Laws

1. Coal Transporters Forum v Eskom Holdings Ltd and Others [2019] ZAGPPHC 76

This is one of the most directly relevant cases concerning the legal structure of REIPPPP rounds.

The applicant challenged Eskom's proposed conclusion of PPAs with successful renewable-energy IPPs and questioned the regulatory authority underlying the procurement.

The High Court described the REIPPPP process as involving:

bid notification;

registration;

submission;

evaluation;

preferred-bidder appointment; and

project-document signing.

The Court also considered the relationship between the Minister's section 34 determinations, NERSA, Eskom and the IPPs. (SheriaHub)

Legal significance: the case confirms that REIPPPP procurement operates within a combination of administrative, electricity-regulatory and contractual law rather than being merely an ordinary commercial tender.

2. Greenstreet 1 (Pty) Ltd v Solar Capital de Aar 3 (RF) Pty Ltd [2021] ZACT 4

This Competition Tribunal decision concerned a merger involving renewable-energy projects operating under REIPPPP.

The Tribunal recognised the special nature of REIPPPP projects: successful IPPs supply electricity to Eskom under long-term PPAs, while important commercial parameters are fixed through the procurement process. The Tribunal also considered the implications of ownership concentration and information exchange among IPPs. (SAFLII)

Legal significance: REIPPPP procurement has consequences beyond administrative procurement law; competition law continues to apply to ownership changes and consolidation involving successful IPP projects.

3. Earthlife Africa Johannesburg v Minister of Energy [2017] ZAWCHC 50

Although this case concerned nuclear procurement rather than REIPPPP, it is highly relevant to the legal architecture of energy procurement.

The Western Cape High Court held that section 34 determinations made by the Minister were unlawful because affected persons and the public had not been given an appropriate opportunity to make representations. (Centre for Environmental Rights)

Legal significance: major energy procurement decisions under section 34 are subject to administrative-law principles, including lawful decision-making and appropriate public participation.

4. Engie-Pele Sannaspos Solar PV Consortium v Director-General of Mineral Resources and Energy [2025] ZAGPPHC 1230

This more recent case directly concerns REIPPPP Bid Window 5 and the position of a Preferred Bidder.

The Court considered the RFP, bid validity and the Preferred Bidder Guarantee. It emphasised that the RFP establishes the rules of participation and enables the Department to evaluate bids and select preferred bidders; it does not itself constitute an offer to contract with every bidder. (SAFLII)

Legal significance: procurement documents can create binding procedural obligations and rights, but appointment as a preferred bidder remains distinct from the final project-contracting stage.

10. Constitutional and Administrative-Law Controls

The legal structure of REIPPPP rounds is ultimately constrained by constitutional administrative and procurement principles.

The principal requirements include:

legality;

rationality;

procedural fairness;

transparency;

competitiveness;

equal treatment of bidders;

compliance with the published RFP;

proper exercise of statutory powers; and

reviewability under administrative law where applicable.

This is particularly important because a Bid Window is not simply a private tender. Governmental decisions concerning generation capacity and procurement derive from statutory powers and therefore may be subject to judicial review.

Conclusion

The legal structure of REIPPPP procurement rounds is a layered system combining the Electricity Regulation Act 2006, section 34 Ministerial Determinations, New Generation Capacity Regulations, constitutional procurement principles, the relevant Bid Window RFP, NERSA regulation, Eskom PPAs, Implementation Agreements and administrative law.

Each Bid Window creates a legally structured competitive process. The government first determines the required generation capacity, publishes an RFP, receives and evaluates bids, identifies Preferred Bidders and then requires successful projects to satisfy contractual, regulatory, financing and grid requirements before construction and commercial operation.

The case law demonstrates that the programme is subject to judicial review, constitutional procurement standards, electricity regulation and competition law. Coal Transporters Forum clarifies the procurement stages; Greenstreet demonstrates the continuing application of competition law to REIPPPP projects; Earthlife Africa establishes the importance of lawful section 34 decision-making and public participation; and Engie-Pele illustrates the contractual and procedural importance of the RFP and Preferred Bidder stage. (SheriaHub)

Thus, REIPPPP Bid Windows should be understood as regulated public procurement mechanisms for renewable electricity, in which administrative authority, competitive tendering, long-term electricity contracts, economic-development obligations and energy-sector regulation operate together.