Carlo Gavazzi has extended its support for renewable energy installations with grid-connected solar photovoltaic inverters. Interface protection and anti-islanding safety circuits ensure that power is only produced when the inverter is connected to the grid, the grid is active, and its parameters are within the appropriate national standards, claims the company. The models cover power generation from 2.8 to 20kW AC nominal output in four single-phase models (ISMGT 128, ISMGT 138, ISMGT 140 and ISMGT 150), and the ISMG 3 15 and ISMG 3 20 three-phase models. Single phase inverters are primarily aimed at household installations whilst the three-phase models are better suited to larger buildings, industrial installations and solar parks. All the inverters operate over wide operating temperature ranges without de-rating. The ISMGT 1 series operates up to 58°C whilst the ISMG 3 series can be used up to 50°C. The single phase inverters are equipped with HF transformers, which enable the use of amorphous, or thin film, panels that are typically positive earthed. The inverters are built in serial communications ports to transmit energy production data and AC and DC voltage parameters to remote terminals or PCs. Dual serial ports enable daisy chaining of connection with other inverters within the same plant. Software is available as a free download from the company's website that allows users to configure and monitor a solar power generation system. The database of the configuration software includes the most popular types of photovoltaic panels, assures the company, and any future models can be added to the database by the user.
