Electricity Arbitrage Trading

Electricity arbitrage trading refers to a trading strategy in which electricity is purchased at times of low market prices, stored temporarily in a storage system, and sold again or used on site when prices are higher. The difference between low and high price periods generates additional revenue. In practice, arbitrage is often used synonymously with energy trading. Technically, however, arbitrage is a specific strategy that exploits price differences between points in time or markets – frequently automated and closely linked to price and forecast signals.

How does electricity arbitrage work in practice?

The basis is fluctuating electricity prices on spot markets. A storage system charges during low-price periods and discharges when prices are higher – either by feeding into the grid or by reducing on-site consumption. This is particularly relevant in intraday trading, because short-term price signals arise within a single trading day.

Arbitrage as a building block of storage optimisation

Arbitrage is often one building block within a more comprehensive cross-market optimisation. Here, a storage system is not optimised for a single revenue stream, but controlled across multiple applications and markets so that overall profitability increases.

Frequently Asked Questions (FAQs)

What does electricity arbitrage trading mean?

Electricity arbitrage trading means buying electricity at low market prices, storing it temporarily, and selling it again or using it on site when prices are higher. This generates additional revenue from price fluctuations on the electricity market.

How does arbitrage work with an electricity storage system?

An electricity storage system charges during periods of low prices (or high on-site generation) and discharges during periods of high prices. This makes economic use of the difference between purchase and sale.

What role does intraday trading play in arbitrage?

Intraday trading is a typical use case for arbitrage, exploiting short-term price changes within a single day. Battery storage systems can charge or discharge automatically in the process.

How does arbitrage differ from cross-market optimisation?

Arbitrage is a single revenue strategy based on price fluctuations. Cross-market optimisation combines several revenue streams and applications to maximise the overall revenue of a battery storage system.

Who is electricity arbitrage particularly interesting for?

Arbitrage is particularly interesting for companies with photovoltaics, battery storage or charging infrastructure, because storage can then not only reduce costs but also enable market-based additional revenue.