Electronic loads are often simulated as the characteristics (constant resistance, constant voltage or constant current) of the DUTs to test whether the output capability of the battery, power supply, solar cell, or power supply unit meets user's requirements. Unlike using general resistive components to test batteries and power supplies, electronic loads can dynamically switch simulated resistors, voltages or currents, customize the rise and fall times of current sink, and even edit a complex and continuous load change.
GW-INSTEK is offering a broad range of DC Electronic load solutions - PEL-2000 & PEL-3000 series
PEL-2000 Series
Datasheet PEL-2000 series [PDF]