The Keysight RP7942A is a high-performance bidirectional regenerative DC power supply delivering 80 V, ±125 A, and 5 kW for advanced energy storage, battery testing, automotive electrification, and aerospace power validation. Operating in two-quadrant mode, it functions as both a precision DC source and regenerative load, returning up to 90% of energy back to the grid for efficient, accurate, and sustainable high-power testing.