PV Production – tracker vs. fixed

Have you ever wondered about the benefit of a dual-axis tracker over a fixed array? Based on a comparison of two PV systems, the tracker is worth the additional cost, if you have the right conditions for installation of a tracker. Part of the increase in production shown in the graph is related to the way a tracker handles snow – it cleans itself off after a storm, whereas a fixed array (roof mount in this case) does not. Note that the tracker came online on June 5 late in the day.

PV ProductionAs you can see in the graph, the tracker out-performed the fixed array, especially in the winter when there was significant snow cover on the roof (January and February). While December 2014 was a bad month for PV by all measures, the tracker was able to produce more than double the amount of power than the fixed array. The average production of the tracker over a 10-month period is around 37% more than the fixed array.

If you are interested in more information about trackers, or PV in general, please contact us. We would love to help you.


About Lee

As founding member of Net Zero Renewable Resources, LLC (NZRR), Lee is involved in all aspects of renewable projects, from meeting with prospective customers to ascertain their renewable energy goals, to designing systems, and facilitating and overseeing all aspects of the installation. Having designed and installed his own solar electric backup system in 1999 and currently living off the grid in a home powered completely by solar, Lee understands the intricacies of renewable energy and is able to explain complex systems in easy-to-understand terms.
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