What is difference between Capacity Market and Energy Only Market ?

•  In Capacity Market - Grid 'reliability' or 'capacity' is ensured by paying the participants to commit generation in years in future.

• Energy-Only Markets: They pay generators only when power is provided on a day-to-day basis.

• In general 'Wholesale' electricity markets have combination of both Capacity Market and Energy Only Market. In some rare cases with low electricity prices and high confidence in future availability, there could be cases where there are no Capacity Markets.