Solar Array Simulator Enhances Micro-Inverter Testing

The Elgar brand TerraSAS Solar Array Simulator embarks as a fully integrated solution for the design, development, and production testing of inverters and micro-inverters for domestic and industrial solar energy systems. The system simulates photovoltaic (PV) dynamic solar irradiance and temperature characteristics over a range of weather conditions and over a specified time interval to produce the current and voltage characteristics for the specified PV array for those conditions. For ease of use, a simulation engine downloads data from the National Renewable Energy Laboratory Solar Advisor Model database defining key parameters, i.e., open circuit voltage, short circuit current, and maximum power point voltage at +25°C and 1000 W/m² irradiance, so that the IV curve can be calculated according to a standard solar cell model for virtually any fill factor or solar material. The modular, rack-mounted system provides one or more programmable dc power supplies available in 1 kW to 15 kW increments, a controller module and simulation engine for implementing the sequencing of the PV panel IV curves, power supplies that can be configured as master/auxiliary, a user friendly key board and GUI, and relays for output isolation and polarity reversing. For more information, call AMETEK PROGRAMMABLE POWER, San Diego, CA. (800) 733-5427.