This 4kW three-phase 220V solar water pump inverter integrates the MPPT algorithm to lock onto the optimal power point of photovoltaic cells (250V-400V) with >99% efficiency. The solar VFD supports all-weather auto/manual operation, adjusting work schedules with sunrise and sunset.
[pdf] Use an EI or toroidal transformer with a 12V center-tap primary and a 220V secondary. Ensure the core supports the target power output–typically 300–1000W–without saturation. If you use ferrite cores, adjust the switching frequency between 20 kHz and 50 kHz to reduce audible noise.
[pdf] The 60V to 220V inverter is designed for both residential and commercial use. It converts energy from a 60V battery system—commonly used in solar setups, RVs, boats, and electric vehicles—into 220V AC power, which is compatible with most household appliances and electronics.
[pdf] 
