SPI 2018

IV Curves Demystified

Tuesday, September 25
11:00 AM - 12:00 PM
Location: Installer Training: Booth 1486

IV curves are the basic graphical representation of performance of PV cells, modules and strings, and they provide a wealth of information. In this brief presentation, we will review I-V curves and show how they 'build up' - from cells to modules to strings - when put in series and or parallel. Proper set-up and safe operation of curve tracers will be discussed, as well as how to interpret the outcomes. We will review bypass diodes and attendees will see how failed diodes can affect curve traces. Also, attendees will see the 5 most common reasons resulting in abnormal I-V curves.

This session will earn attendees one (1) NABCEP Continuing Education Credit

Brian Mehalic

Solar Energy International

Brian Mehalic is a NABCEP-certified PV professional and IREC-certified PV instructor with over 12 years of experience designing, installing, servicing, and inspecting all types and sizes of PV systems. He began his career as Lead Installer and Project Manager at EV Solar Products in Arizona, where he was directly responsible for the design and installation of over 150 photovoltaic systems, ranging from residential off-grid to commercial grid-interactive. For the past several years he worked as Project Engineer for O2 Energies in North Carolina, advising the developer on system design, modeling performance, and performing quality assurance inspections on over 23 megawatts of ground-mounted PV. Currently he is a curriculum developer and instructor for Solar Energy International and North Carolina State University, a frequent contributor to SolarPro and Home Power magazines, and an independent consultant providing services ranging from system design and quality assurance inspections to commissioning, troubleshooting, and maintenance.


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IV Curves Demystified

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