How do you integrate a battery energy storage system (BESS) with building electrical infrastructure?

BESS integration requires: sizing based on application (peak shaving, demand management, backup power, PV firming), inverter selection (AC or DC coupled), interconnection point determination affecting protection and metering, transfer capability for backup operation, BMS integration with building management, fire protection per NFPA 855 with spacing, ventilation, and suppression requirements, NEC Article 706 compliance for installation, and utility interconnection agreement. Control system implements operating strategy. Economic analysis compares demand charge savings, arbitrage potential, and reliability value against capital and O&M costs.