Project Description

Transformerless Grid-Connected Inverters for domestic photovoltaic applications (4kW). The inverter has a patented modulation (UNI-TL) which uses a
topology to active six devises in order to reduce leakage to ground, which is typical of the solutions without galvanic isolation. The converter can manage two independent strings of panels thanks to a double step-up stage with two independent MPPT algorithms.

Input
Power PV Field	4400 W
Maximum Input Voltage	550 Vdc
Range MPPT	90-450 V
Maximum Current for each string	14 A
Maximum input power of each channel	2500 W
Two independent MPPT channels	Yes
Output
Nominal Power	4000 W
Nominal Voltage	185 – 270 Vac
harmonic distortion	<3%
Maximum efficiency	97%
European efficiency	96%
User Interface
LCD	graphic matrix display 128×64
Communication Interface	RS485 – Modbus

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