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The process of investigation after an inspected rooftop PV system catches...

A fire occurred on the roof of a house that had a photovoltaic (PV) system installed on that roof and the PV system was...

Back to basics: Conductors, currents and circuit protection

For the time being, the transmission of electrical energy in a photovoltaic (PV) electrical power system requires that the various components be hardwired. Followers...

What inspectors do when it’s too bad to go outside

'Twas a dark and stormy night. The rain was pouring down, the wind was swirling around the house, and thunder and lightning were much...

Getting Down and Dirty with Supply Side PV Connections

Continuing decreases in the cost of photovoltaic (PV) power systems have resulted in residential and commercial PV systems that are increasing in size and...

Overcurrent Protection and Disco Oddities

The two previous articles in this series covered how currents are developed and handled in PV systems and how the ampacity of conductors is...

Dealing with Currents in PV Systems — Just a little more...

In the previous article in this series, we saw how the voltages from PV modules are affected by the environment and how the National...

Solar Farms – School of Hard Knocks

If you have read my November/December 2016 article in IAEI Magazine regarding the hard lessons learned by some of the large solar contractors, you...

PV Modules Part 2. Calculations, This Won’t Hurt—Much

DC Modules Output varies.  As addressed in the previous article in this series, the direct current output of a dc PV module varies with the...

Alternating Current Disconnect Requirements for Photovoltaic Operation within California

With close to 500 authorities having jurisdiction (AHJs) in the state of California alone, it is often difficult to keep track of the preferential...

PV MODULES, Part 1 — What the AHJ Needs to Know,...

The Physics of the PV module. (Seasoned electrical authorities having jurisdiction (AHJs) may skip the section.) Photons (solar energy from sunlight) hit a PV module and...
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