Import 500kw Solar Inverter Work Without Battery — Buy in wholesale FOB from Supplier in China

The SDP series 500kW solar inverter from Zhejiang Sandi Electric Co., Ltd. converts direct current from photovoltaic arrays into alternating current for direct grid injection or standalone load supply without battery storage. It employs SVPWM space vector modulation and a sixth-generation Mitsubishi IPM power module to achieve conversion efficiency up to 94 percent. The DSP28335 digital signal processor from Texas Instruments handles control algorithms with rapid fault response. Input voltage ranges are selectable to match string configurations, with wide DC windows of 100-300V, 200-500V, or 500-850V depending on the ordered variant.

Isolation between DC input and AC output is provided by a transformer, with input and output circuit breakers integrated for safety and installation economy. The output voltage can be adjusted from minus 40 percent to plus 20 percent of nominal, regulated to within plus or minus 1.0 percent accuracy. Two motor-starting modes are offered: reduction voltage start and variable frequency start, selectable through the interface to match load inertia. Protection covers overload, short circuit, DC over-voltage, DC under-voltage, and improper operation sequencing, with fault logging displayed on the LCD panel alongside real-time voltage, current, and cumulative energy in kWh.

This inverter suits solar-diesel hybrid mini-grids, agricultural irrigation systems, industrial process power, and commercial buildings where battery capital cost is to be avoided. Loads include induction motors, air conditioning compressors, CNC equipment, and fluorescent or LED lighting. Without battery buffering, the inverter must track array maximum power point closely and ride through irradiance transients. Buyers should confirm with Zhejiang Sandi Electric Co., Ltd. the exact AC output voltage, frequency, and phase configuration for their grid code, as well as harmonic compliance standards applicable in their country.

Zhejiang Sandi Electric Co., Ltd. is headquartered in Yueqing Economic Development Zone, Zhejiang Province, China, with registered address at Building 13-2 Botong Huigu, No. 66 Binhai South Four Road. The company holds a harbor trust tier classification. Response metrics show 0.00 percent response rate and zero average response hours, indicating no tracked communication history through this channel. Buyers should initiate contact directly and establish expected response timelines during early negotiation.

The listing positions Zhejiang Sandi Electric as a specialist in power conversion equipment, specifically the SDP series of transformer-isolated inverters. No information is provided about factory floor area, employee count, annual inverter output, revenue, client lists, or ISO certifications. The use of imported Mitsubishi IPM and Texas Instruments DSP components suggests a design and assembly operation with access to global semiconductor supply chains. Buyers are advised to request factory audit reports, quality management system certificates, and reference installations of comparable capacity before committing to volume orders.