Import 500kw Off Grid Inverter With Csa/Ul Certificate — Buy in wholesale FOB from Supplier in China

Zhejiang Sandi Electric Co., Ltd. produces the SDP series 500 kW pure sine wave inverter for off-grid and renewable energy installations requiring CSA and UL certification for North American market access. The unit converts DC input from battery banks or photovoltaic arrays to 3-phase AC output through a sixth-generation Mitsubishi IPM module and Texas Instruments DSP28335 control processor, achieving output voltage accuracy of +/-1% with adjustable range from -40% to +20% of nominal. Input voltage is field-configurable across three ranges (100-300 V, 200-500 V, or 500-850 V) to suit different solar string designs and battery configurations without backup storage.

The inverter architecture employs an isolation transformer design with input and output circuit breakers, providing galvanic separation between DC source and AC load for safety and fault containment. Start-up modes include reduction voltage start and variable frequency start, selectable according to load characteristics (high inrush motors vs. electronic loads). SVPWM modulation delivers low harmonic distortion sine wave output compatible with capacitive, inductive and non-linear mixed loads including CNC machines, pumps, air conditioning compressors and fluorescent lighting. The LCD and LED display panel provides real-time monitoring of voltage, current, cumulative energy and fault codes.

Intended applications span remote industrial sites, islanded microgrids, mining camps and rural electrification projects where grid connection is unavailable or prohibitively expensive. The wide input voltage range enables direct-coupled solar operation without battery storage, reducing capital cost. Buyers should confirm with Zhejiang Sandi whether CSA/UL certification covers the complete system or specific subassemblies, whether harmonic compliance meets IEEE 519 or local utility requirements, and what warranty period and field service network apply for installations outside China.

Zhejiang Sandi Electric Co., Ltd. is headquartered at Building 13-2 Botong Huigu, No. 66 Binhai South Four Road, Yueqing Economic Development Zone, Yueqing City, Zhejiang Province, postal code 325600, China. The supplier holds a harbor trust tier on the marketplace with a 0.00% response rate and zero recorded average response hours, indicating minimal platform-mediated engagement. Prospective buyers should plan for direct outreach to the listed address or through established import channels to secure quotations and technical support.

The company positions itself in the power electronics sector with specialisation in off-grid inverters for solar and wind hybrid systems, emphasising North American market compliance through CSA and UL certification of its SDP series. Its technical marketing highlights imported core components (Mitsubishi IPM, TI DSP) and modular, plug-in construction for maintainability. No information is disclosed regarding factory size, annual production capacity, ISO quality certification, historical revenue, or installed base. Importers should request a company capability statement, certified test reports for the 500 kW unit, and evidence of ongoing CSA/UL factory surveillance audits to confirm certification validity.