20kW high-power Low frequency isolation inverter achieves conversion from 48VDC to three-phase 400VAC

Input Parameters
DC Input Voltage
Rated Voltage: 48V (compatible with battery pack voltage)
Allowable Range: 42V–100V (customisable upon request), supports optional mains/battery dual input mode with configurable DC or AC priority.
Charging Function (Optional)
Charging Current: 50A–150A (configurable), supporting equalisation/float voltage settings (48V–58.4V), compatible with lead-acid/lithium batteries, etc.

Output Parameters
AC Output Characteristics
Rated Power: 20kW (three-phase), supporting continuous operation with 100% resistive load.
Output Voltage: Three-phase 230V/400V, configurable 50Hz/60Hz, accuracy ±1%, Total Harmonic Distortion (THD) ≤3% (linear load).
Output Current: Three-phase line current approx. 28.9A (at 400V), overload capacity 120% for 35 seconds.
Dynamic Response and Efficiency
Switching Time: Mains/inverter transition ≤5 seconds
Efficiency: ≥88%
Dynamic Response: Voltage fluctuation ≤5% during 0-100% load changes, recovery time ≤20ms.

Technical Breakthroughs
The BZP series low frequency off grid inverters incorporate both step-down start and variable frequency start modes. In inductive load applications with motorised loads, they reduce inverter capacity requirements, saving users approximately 30% in equipment costs. Harmonic distortion remains below 3%. The unit incorporates an integrated mains-frequency isolation transformer, achieving complete electrical isolation between AC and DC buses for robust electromagnetic interference resistance.

Application Scenarios
Its wide DC input range (42-100V) accommodates diverse energy storage battery characteristics and supports three-phase unbalanced output. In industrial settings, the equipment drives precision machinery such as CNC machine tools and laser cutters with low no-load losses. For data centre applications, its bypass design enables switching within 5 seconds during mains power failures, ensuring 24/7 uninterrupted power supply.

Market Trends
Within the Chinese market, despite facing price competition pressures, exports of high-value-added commercial and industrial storage products continue to grow. This mains frequency inverter holds certifications including European CE, Canadian CSA, and China Classification Society (CCS), guaranteeing quality assurance.