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The NEP Neptune 33kW is a commercial-grade, three-phase grid-tied string inverter optimized for 400V/480V VAC utility connections. It is specifically designed to be “RSD-ready” (Rapid Shutdown) by integrating a built-in NEP Rapid Shutdown Transmitter, which simplifies compliance with NEC 690.12 without requiring external hardware.
The NEP Neptune 33kW (NEP-33KW) is a high-efficiency, three-phase grid-tied string inverter specifically designed for the North American 480V commercial market, delivering a maximum efficiency of 98.8% and a CEC-rated efficiency of 98.3%. This “RSD-ready” powerhouse features 3 independent MPPTs supporting up to 6 string inputs with a 150% DC/AC oversizing ratio, and it comes equipped with a built-in NEP Rapid Shutdown Transmitter that natively integrates with panel-level devices to meet NEC 690.12 requirements. Engineered for long-term durability in harsh environments, it boasts an IP66/NEMA 4X enclosure with C5-level anti-corrosion protection, an intelligent redundant fan-cooling system, and integrated safety features including AFCI protection and PID recovery to maintain optimal module performance. With advanced diagnostic tools like smart I-V curve scanning and panel-level data granularity through the NEP Galaxy platform, the Neptune 33kW offers a streamlined, cost-effective solution for commercial solar installations by supporting aluminum wiring and reducing the need for external balance-of-system hardware.
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