Approaching the Inverter

/01/In our top-to-bottom perspective of a photovoltaic (PV) system, we are still on the dc circuits from the PV array and are approaching the...

Questions from Inspectors — Inquiring Minds Need to Know

The following questions and answers result from some of the more common situations that many inspectors face throughout their working day when seeing a...

Nooks and Crannies in PV Systems Where the Code “Don’t Shine”

The National Electrical Code published by the National Fire Protection Association covers numerous subjects relating to the installation of electrical systems including the installation...

Photovoltaic Power System Overcurrent Protection: Why, How and Where

Photovoltaic power systems, like other electrical power systems, require overcurrent protection for conductors, bus bars, and some equipment. However, some of the electrical sources...

Why Inspect PV Systems?

Photovoltaic power systems are a rapidly growing (30+ percent/year) segment of the residential and commercial electrical systems market. These systems operate up to 600...

Cables and Connectors for PV Modules

INTRODUCTION The exposed cables and connectors used in PV source circuits are some of the most critical components of a PV system in terms of...

Supply-side PV Utility Connections

Many larger PV systems cannot meet the requirements for a load-side (of the service disconnect) connection to the premises wiring system and a supply-side...

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...

Gray Areas in PV and the Code

The National Electrical Code, even though it is now almost 900 pages long, cannot specifically define every particular piece of equipment and every installation requirement...

The Inverter

In our top-to-bottom perspective of a PV system, we have arrived at the inverter. The utility-interactive inverter is a key element in the PV...