Guides
Plain-language guides to reading the World Electricity Clock, how wholesale electricity prices are set, when power is cheapest and what moves prices.
These guides explain the numbers on the World Electricity Clock and the markets behind them. Each one comes from the SolarCostData Data Desk, lists its primary sources at the end, and shows a live figure from the board where it helps.
- Electricity Demand Peaks: When Grids Are Most Stressed
When electricity demand peaks each day and season, why heat waves and cold snaps stress grids, and how operators plan reserves for the highest hours.
- Electricity Market Guide: GB, Denmark, Australia, Taiwan, US
How the electricity markets on our pages work: who runs them, how prices are set, interval lengths, time zones and what each data feed shows.
- Electricity Prices in the US: How the Grid Operators Compare
How the seven U.S. grid operators and the non-RTO regions differ, what drives regional power prices, and EIA's August 2026 retail prices by region.
- How Electricity Prices Are Set: Day-Ahead, Real-Time, Imbalance
How wholesale power prices are formed in Europe's day-ahead auction, Australia's five-minute market and Britain's imbalance system, and what bills add.
- How to Read the World Electricity Clock
What the clock's big number counts, which markets are included, why it ticks and pauses, what the badges mean and where the data comes from.
- Negative Electricity Prices Around the World: Where and Why
Where wholesale power prices fall below zero, from South Australia to Denmark, Britain and U.S. markets, why it happens and what our tracked days show.
- When Is Electricity Cheapest? How to Shift Use to Cheap Hours
When wholesale power is cheapest in Denmark, Australia and Britain, how network tariffs change the answer, and which household loads can move.
- Wind, Solar and Gas: What Moves Electricity Prices
How wind, solar, gas, demand and transmission limits push wholesale electricity prices up or down, with examples from the grids we track.