80wp signifies the power output capacity of solar panels and is a critical metric in evaluating solar energy efficiency. The 'wp' stands for 'Watt-peak', indicating the maximum output under standard test conditions. A panel with an 80wp rating can produce a maximum of 80 watts. Wattage refers to the amount of electrical power a solar panel can produce under standard test conditions (STC), which simulate a bright sunny day with optimal solar irradiance (1,000 W/m²), a cell temperature of 25°C, and clean panels. A panel's rated watts (also called its solar panel rating) help estimate how much power it can produce, how many panels you may need, and how your system might perform over time. Your system must meet your usage needs. A 350W high-efficiency panel can perform better than a 400W low-efficiency panel in certain conditions, especially where roof space is limited.
[PDF Version]