Photovoltaic power generation has gained attention in recent years, largely due to a new sense of urgency regarding the prevention of global warming. Thermal power generation and other forms of power based on the limited resources of oil and coal release environmentally harmful CO2, the main cause of global warming. Photovoltaic power on the other hand, does not require these raw materials, does not release CO2, and is a clean, renewable energy source; therefore it is considered to be a major energy alternative for the future. For the evaluation of voltage, current, and power in photovoltaic power generators, the WT500 Power Analyzer provides measurement with world-class DC and AC signal accuracies.