Competition in Retail Electricity Markets

1. Introduction

Retail electricity markets concern the sale of electricity to final consumers such as households, businesses, industries and public institutions. Competition at the retail level allows consumers, where the market is designed for choice, to select among different electricity suppliers.

Competition can encourage lower prices, better customer service, innovative tariffs and new energy services. However, electricity retail markets have special characteristics because electricity is delivered through shared networks and consumers normally cannot choose a different physical distribution network.

2. Meaning of Retail Competition

Retail competition exists when different suppliers can compete to provide electricity or electricity-related services to consumers.

Retail suppliers may compete through:

electricity prices;

fixed and variable tariffs;

renewable-energy products;

time-of-use tariffs;

demand-response services;

smart-meter services;

customer service; and

bundled energy technologies.

Competition therefore does not require competing electricity wires. Different suppliers can use the same regulated distribution network to serve customers.

3. Natural Monopoly and Retail Competition

Electricity distribution networks usually have natural-monopoly characteristics. Constructing separate networks for every retailer would normally be inefficient.

Retail competition therefore depends upon non-discriminatory network access. A distribution-network operator should not give preferential treatment to its own retail affiliate or impose unreasonable conditions on independent suppliers.

This creates an important legal distinction between the competitive retail market and the regulated monopoly network.

4. Market Power

Retail electricity markets can experience market-power problems when only a small number of suppliers control a large proportion of customers or electricity supply.

Market power may be strengthened by:

high barriers to entry;

limited generation availability;

exclusive contracts;

customer switching costs;

inadequate network access;

information advantages; and

vertical integration.

Competition authorities may therefore examine market shares, entry conditions, customer behaviour and the availability of alternative suppliers.

5. South African Competition Law

The Competition Act 89 of 1998 provides the general competition-law framework in South Africa. Section 4 addresses certain horizontal restrictive practices, section 5 concerns vertical restrictive practices, and section 8 regulates specified conduct by dominant firms.

A dominant electricity supplier is not automatically acting unlawfully merely because it has a large market share. The relevant question is whether its conduct falls within a prohibited category and produces the legally required competitive effects.

Retail electricity competition must also operate alongside electricity-sector regulation, including the regulatory responsibilities of NERSA.

6. Senwes Case

The Constitutional Court's decision in Competition Commission of South Africa v Senwes Ltd provides an important competition-law principle concerning vertical relationships and exclusionary conduct.

Senwes had a strong position in grain storage and operated in related markets. The Court considered whether conduct involving control over an important facility could disadvantage competitors.

Although the case did not concern electricity retailing, its reasoning is relevant by analogy. An electricity company controlling an important upstream resource or network could potentially use that position to disadvantage competing retailers.

7. Telkom Case

Competition Commission v Telkom SA Ltd is also useful as a comparative infrastructure case.

The case concerned alleged exclusionary conduct involving telecommunications infrastructure and downstream markets. Its relevance to electricity lies in the relationship between an infrastructure network and competitive services using that infrastructure.

For electricity markets, similar concerns could arise where a network-affiliated retailer receives preferential access to network services, customer information or connection facilities.

8. Electricity Pricing

Retail competition can place downward pressure on prices because suppliers must attract and retain customers. However, high prices do not automatically establish a competition-law violation.

Prices may increase because of:

fuel costs;

generation shortages;

network charges;

taxes;

regulatory costs;

wholesale electricity prices; or

legitimate investment requirements.

Competition analysis must therefore distinguish ordinary cost-based price increases from unlawful pricing conduct.

In Sasol Chemical Industries Ltd v Competition Commission, the Competition Appeal Court considered excessive pricing under section 8(a). The case demonstrates the importance of economic evidence when assessing whether pricing by a dominant firm is excessive.

9. Consumer Switching and Information

Effective retail competition requires consumers to be able to understand and compare offers. Complicated tariffs, misleading information and high switching costs can reduce competitive pressure.

Consumer protection therefore complements competition law. Suppliers should provide transparent information concerning tariffs, contract periods, penalties, renewable-energy claims and other material terms.

Smart meters can also support competition by allowing suppliers to offer time-based and usage-based products.

10. Vertical Integration

Vertical integration can create efficiencies but may also create foreclosure risks. For example, a company involved in generation, distribution and retail supply could potentially favour its own retail business.

Competition authorities may therefore examine whether competitors receive equal access to electricity supply, network services, information and customers.

Appropriate separation and transparent access rules can reduce these risks while allowing legitimate efficiencies.

11. Renewable Energy and New Retail Models

Retail electricity competition is increasingly affected by rooftop solar, batteries, electric vehicles and distributed-energy resources.

Consumers may become both electricity users and electricity producers. New retail models can therefore involve aggregation, peer-to-peer trading, demand response and flexible tariffs.

Competition law must ensure that established suppliers do not unnecessarily prevent innovative businesses from entering these emerging markets.

12. Conclusion

Competition in retail electricity markets can improve consumer choice, pricing transparency, service quality and innovation. However, effective retail competition depends upon fair access to monopoly electricity networks and adequate opportunities for new suppliers to enter.

The Senwes, Telkom, and Sasol Chemical Industries cases provide useful principles concerning exclusionary conduct, infrastructure dependence and pricing by dominant firms. A strong legal framework should therefore combine competition law, electricity regulation and consumer protection. The ultimate objective is to create conditions in which suppliers can compete fairly while electricity remains reliable, accessible and economically sustainable.