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EXELTECH says no single malfunction will cause the inverter system to fail. Modules are “hot” insertable. Power levels are expandable and modules can be added or replaced without interruption in power to critical loads. The MX system can be configured for power levels from 1 to 20 kW with 120 VAC output. Up to 40 kW at 240 VAC bi-phase or 60 kW at 208 VAC 3-phase with many input and output voltages are also available. A control card and any number of additional 1,000 watt power modules combine to make a standard inverter. This type of system can be expanded as power requirements increase and upgraded to be N+1 redundant as desired. The MX system is compact and lightweight. Power modules weigh 7 pounds each. Output voltage is precisely regulated so that no measurable voltage change occurs on the output as input voltage fluctuates, the company says, adding that less than 0.5 volt change in output voltage will occur when the output load varies from 0 percent to 100 percent of rated power. With distortion of 2 percent maximum, the inverter is designed to offer the cleanest sine wave power available. Models are available to cover all standard battery systems. Custom models can be designed to meet specific input voltage requirements. Distributed to the rail industry by ARMS.