Relevant aspects in designing a photovoltaic inverter for industrial and commercial applications

This paper presents design considerations for grid connected photovoltaic inverters intended for use in industrial and commercial applications. Important aspects such as efficiency, reliability, construction constraints, control, standards and grid codes compliance are discussed. On the other hand, characteristics of a 600 V system based on Japanese standards and a 900 V system based on IEC standards are compared and discussed. Experimental data for a 2 kW down-scaled prototype are presented along with test data for 250 kW isolated and transformerless units built under Japanese standards and IEC standards.