BESS Charge / Discharge Profile by Hour of Day

Figure 1. Annual hourly distribution of BESS charge/discharge. Charging concentrates in the early morning, mainly in low-cost hours; discharging concentrates in the evening peak hours.

Average Daily Grid Purchase Profile: Original vs. With BESS

Figure 2. Average daily grid-purchase power profile. With BESS, deep-night purchase rises due to charging and evening purchase falls due to discharging.