Connection Charging Reforms for Distributed Generation

1. Introduction

Distributed generation means electricity produced close to consumers rather than only by large central power stations. Examples include rooftop solar, small wind projects, embedded generators, battery-supported generation and private renewable-energy facilities.

As distributed generation increases, traditional connection-charging systems may need reform. The main questions are: who should pay for grid connection, how much should they pay, whether network reinforcement costs should be shared, and how charges can encourage renewable generation without shifting unfair costs to other electricity users.

In South Africa, these issues are governed through the Electricity Regulation Act 4 of 2006 (ERA), NERSA tariff decisions, the South African Grid Code, distribution rules and connection agreements.

2. Why Charging Reform Is Necessary

Traditional electricity networks were designed mainly for one-way electricity flows—from large generators through transmission and distribution networks to consumers.

Distributed generation changes this structure. A consumer can now become a prosumer, producing electricity and sometimes exporting surplus power to the grid.

This creates new costs relating to:

bidirectional electricity flows;

protection and control equipment;

metering;

network reinforcement;

voltage management;

connection studies;

system operation; and

administration.

A modern charging framework therefore needs to recognise both the costs and benefits created by distributed generation.

3. Cost-Reflective Charging

One important reform is moving towards cost-reflective connection charges. A generator should generally contribute to infrastructure specifically required for its connection, while wider network investments benefiting many users should not automatically be charged entirely to that generator.

The South African Transmission Tariff Code states that connection charges cover network assets specifically installed to connect a user or group of users. It also provides that both generation and load customers can be liable for connection charges. Standard connections generally recover dedicated assets, while wider grid strengthening is recovered through transmission-use-of-system charges.

This approach helps distinguish private connection costs from shared network costs.

4. Reform Through Network Sharing

Distributed generators may increasingly share substations, lines and connection points. Charging reforms can therefore encourage shared connection infrastructure.

The Grid Code specifically states that connection charging should encourage users to share connection sites because this can improve efficiency and allow infrastructure costs to be shared. It also requires clear and transparent allocation rules and non-discrimination between users.

This is particularly important for renewable-energy projects connecting in areas where grid capacity is limited.

5. Connection and Use-of-System Charges

NERSA's regulatory framework for third-party transportation of energy provides that connection charges are payable by generators and loads and may contribute to the upfront cost of connecting generation facilities and other electrical infrastructure, including network strengthening. It also contemplates a Connection and Use-of-System Agreement between a generator and network service provider.

Therefore, future reforms need to coordinate:

connection charges;

use-of-system charges;

wheeling charges;

network reinforcement costs; and

metering and balancing arrangements.

6. Relevant Case Law

Vaal River Development Association v Eskom (2020)

This case is important because the High Court considered a connection-charge methodology involving additional dedicated costs and upstream sharing charges. The Court recorded that the methodology should comply with the South African Grid Code Transmission Tariff Code.

The case illustrates why transparent rules are necessary when determining whether costs should be allocated directly to a customer or shared through the network.

Eskom v Lekwa Ratepayers Association (2022)

The Supreme Court of Appeal confirmed that electricity generation, transmission and distribution are regulated under the ERA and that NERSA is the relevant regulatory authority. The Court also recognised the relationship between electricity agreements, NERSA rules and licence conditions.

This supports the principle that connection charges cannot be treated as purely private contractual matters when they are governed by regulatory rules.

Sibanye Gold v Eskom (2026)

This recent case involved a solar photovoltaic project and Eskom's proposed alternative connection arrangement. Eskom's alternative would have involved additional wheeling costs, which the applicant argued would make the project commercially unfeasible. The Court ultimately set aside Eskom's refusal decision.

Although the case was not directly about a comprehensive distributed-generation charging reform, it demonstrates the practical importance of reasonable grid-access arrangements and predictable network costs for private renewable generation.

J R Properties v Eskom (2016)

This case concerned an electricity connection and the obligations surrounding physical connection infrastructure. It demonstrates that connection arrangements can create enforceable obligations concerning both payment and technical readiness.

7. Recent Regulatory Direction

NERSA has continued developing the regulatory framework for decentralised electricity. Its published regulatory material includes Grid Capacity Allocation Rules approved in December 2025, as well as rules concerning network charges for third-party transportation of energy.

These developments are significant because distributed generation increasingly requires transparent allocation of scarce grid capacity.

Conclusion

Connection charging reforms for distributed generation should promote fair cost allocation, transparency, non-discrimination, efficient grid investment and easier renewable-energy connections. South Africa's framework is moving towards a system in which dedicated connection assets, shared network infrastructure and use-of-system services are treated separately. Cases such as Vaal River, Lekwa Ratepayers, Sibanye Gold and J R Properties demonstrate the importance of regulatory consistency and clear contractual arrangements. Effective reform can help integrate distributed generation while maintaining the financial sustainability and reliability of electricity networks.