A fire station with 480/277V utility service adds a 60 kW solar PV array and 50 kW/100 kWh battery storage under a load-side interconnection. The SLD shows the main service disconnect, PV/battery breakers, a 480V main panel, and a 208/120V subpanel serving critical and normal loads.
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Load-side interconnection at 400A main distribution panel with 100A PV and battery breakers
Dedicated watthour_meter for PV production monitoring
Delta-wye transformer to derive 208/120V for lighting, receptacles, and fire alarm loads
Battery modeled as UPS source for simplicity
For commercial or municipal facilities (fire stations, schools, small offices) evaluating NEC 705.12 load-side interconnections of solar PV plus battery storage where a 480V service feeds 208/120V load panels.