These revenues were caused by increased Dynamic Containment Low volumes causing the highest average prices experienced since November.

Although the average requirement of the high-frequency service continues to increase steadily, the low-frequency service average jumped by 53% to 1,245MW between June and July, which Modo attributed to frequency oscillations in Scotland.

This resulted in Dynamic Containment Low prices increasing by over 300% to £6.41/MWh in July (from £1.41/MWh in June).

Negative pricing in day ahead markets in July – for example the drop to -£54.17/MWh on Saturday 16 July – presented wholesale opportunities for batteries by allowing batteries to be paid to charge, continued Modo.

This story originally appeared on our UK sister sites, Solar Power Portal and Current.