Kilowattpeak

Kilowattpeak, often abbreviated as kWp, is a unit of electrical power commonly used to express the nominal power of a photovoltaic (PV) system, such as solar panels. It represents the maximum power output a solar panel or a system of solar panels can generate under specific standardized testing conditions. These conditions typically include a solar irradiance of 1000 watts per square meter (W/m²) and a cell temperature of 25 degrees Celsius (°C).

The "peak" in kilowattpeak signifies that this is the theoretical maximum output. In real-world operation, the actual power output of a solar PV system will fluctuate based on various factors. These include the intensity of sunlight (which varies with time of day, season, and weather), the ambient temperature, the angle and orientation of the panels, and any shading or soiling that might occur. Therefore, a system rated at a certain kWp will rarely operate at its peak output for extended periods.

Understanding kWp is crucial for assessing the potential energy generation of a solar installation. It allows for comparisons between different solar panels and systems. While kWp indicates the potential power, the actual energy produced is measured in kilowatt-hours (kWh), which is a measure of energy over time. For example, a 5 kWp system might produce a certain number of kWh per year depending on its location and installation specifics.