19.80 kW (45 modules). Includes: Design & Engineering Package (plans, PE stamps, BOM/BOS); 45 x Indepwr 440 W bifacial modules; 45 x Tigo TS4-A-O optimizer / rapid shutdown; Tigo Cloud Connect Advanced kit; 3 x EG4 12000XP off-grid inverter; 3 x EG4 16 kWh all-weather battery; Balance of system, racking and wiring ($0.78/W). Professional installation is sold separately.