Transformerless Photovoltaic Grid-Connected Inverter
- 681
- June 7, 2016
- Static Converters
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 |
