SAIL SOLAR 125KW/215KW All-in-One Outdoor Energy Storage System for Commercial Use

PV Power Supplies Loads with Priority
During daytime, electricity generated by the photovoltaic system is converted to AC power by the PV inverter and delivered to the AC bus. This power is first used to supply local loads such as EV chargers or commercial and industrial equipment.

Excess PV Energy Charges the Battery
When PV generation exceeds load demand, the surplus energy is routed through the PCS operating in charging mode (AC to DC) and stored in the lithium battery. This maximizes self-consumption of solar energy and reduces curtailment.

Battery Discharges When PV Is Insufficient
If PV output decreases or load demand increases, the PCS automatically switches to discharging mode (DC to AC). The battery then supplies power to the AC bus, compensating for the power gap and reducing grid dependency.

Nighttime or No-Solar Operation
At night or during periods without solar generation, the PV system is inactive. The BESS supplies power to the loads via the PCS. When the battery state of charge (SOC) reaches the predefined lower limit, the system transfers the load to the utility grid or enters standby mode.

Grid Interaction and Energy Management
The EMS continuously monitors PV output, load demand, battery SOC, and grid conditions. Based on predefined control strategies, it regulates PCS charging and discharging power to enable peak shaving, load shifting, demand control, and grid export limitation (including zero-export operation). Remote monitoring is supported via web and mobile platforms.