Solar panels come in different wattage ratings.
Before going further, it is important to understand Watt Peak and Peak Power better.
The Wp rating of a solar panel denotes the maximum power that can be produced by the solar panel under ideal conditions, which could be during noon time on a sunny day.
The actual power output is the power produced by the panel under real-life conditions, and is most times less than the Wp.
In the current scenario, solar panels typically have a rated power ranging from 200 to 350 Wp. In kWp, thus, solar panels today have between 0.2-0.35 kWp (1000 W = 1 kW).