DC / AC power supply: sine wave inverter
120 V, 500 VA C&D Technologies

These C&D dc to ac inverters provide a well-regulated, 500 VA, low-distortion, 120-Vac sine wave output from a 21 to 29 Vdc or 42 to 58 Vdc power source. Almost any critical industrial or telecommunications equipment within the volt-ampere rating can be powered.
The field-proven components and power conversion techniques of dc to dc converter technology are used in this small, light-weight inverter. It is compatible with many loads normally considered difficult for inverters, including half-wave rectified loads, high surge loads and a wide variety of nonlinear loads. The input and output are isolated from the chassis and from each other, allowing operation in a grounded system.
There is no practical limit on the load power factor because of the unique switching circuitry. It will operate continuously at any load within its rating over its full operating temperature range with simple convection cooling.