No-one can look at a dirty module and say accurately how much production is being lost from soiling. In today's blog we look at how to..

Putting together an action plan is arguably the hardest part of the performance analysis, the action needs to be specific enough to avoid...

Today we'll take a concrete real-life solar PV plant and analyse it to assess the performance and corrective actions. This example is...

The best method to calculate the soiling losses is to perform a module level test on a sample of modules, where some modules are cleaned...

Clipping refers to the scenario where inverter output is maxed out and flatlines even though irradiance continues to increase. This causes..

At some stage during the year almost all solar projects will have shading, either from nearby objects (e.g. buildings, antenna, trees),...

In this example, there are no alerts indicating any issue with the DC field. But somehow the PR is 55% and causing a major headache. What...

String level data is not just important to check for availability, it can also be critical in looking for serious issues such as...

The performance of a solar PV site is based on (1) what % of equipment is available to produce energy (availability) and (2) ...

Before we start our performance analysis we need to check the availability and completeness of site data. Typically any solar asset...

Your phone rings and it’s the CEO… “George… why is solar site XYZ 10% below expected PR (performance ratio) last month and 8% below...

Welcome to the Willow Energies' blog! We'll be writing about solar PV performance analysis, and particularly what to check when looking ..