kWp meaning

kWp is the peak power of a PV system or panel. Solar panel systems are given a rating in kilowatts peak (kWp) which is the rate at which they generate energy at peak performance, such as on a sunny day in the afternoon.

The kWp of a commercial solar panel system will vary depending on how much a business wants to spend and the roof or ground space available to accommodate the panels.

What does kWp stand for?

kWp stands for kilowatt ‘peak’ of a system. The power is calculated under a standardised test for panels across all manufacturers to ensure that the values listed are capable of comparison. The test conditions for module performance are generally rated under Standard Test Conditions (STC): irradiance of 1,000 W/m2, a module temperature at 25 degrees Centigrade and a solar spectrum of AM 1.5. Information about this spectrum can be found here. This is a standardised test which enables comparison between different technologies and brands.

kWp to kWh

When the solar PV panels are operating, they will convert the sun’s radiance into electrical energy, which is measured in kilowatt-hours (kWh). PV panels with a peak power of 270kWp which are working at maximum capacity for one hour will produce 270kWh.

The number of kWh generated will depend on the shade covering your solar panel system, how sunny your site is, and the size of the system that you have installed. This is why it is crucial to gain consultation and expertise from solar panel specialists to design a solar panel system that is efficient for your business and maximises its potential output.

Renewable energy for your business shouldn’t be complicated. We offer consultancy to businesses on how to reduce their carbon footprint, create solar panel systems bespoke to their buildings and maintain them to last through the years.