New IDC Energy Insights Study Highlights Technologies Designed to Prevent Fires in Rooftop Photovoltaic Systems ; New Study Indicates Lack of Standards and Slow Adoption of National Electric Code Delays Deployment of Devices for Fire Protection

FRAMINGHAM, MA – September 30, 2010 – IDC Energy Insights announced at the IDC Energy Insights Clean Energy Outlook conference the availability of a new report, Technology Selection: Reducing Fire Risk in Rooftop Solar PV Systems (Document #EI224977) that highlights the risk of fire in solar photovoltaic (PV) systems and features the technologies that help prevent those fires.

According to the research, rooftop solar PV systems offer a unique set of benefits to home and commercial building owners seeking a quiet, unobtrusive source of clean electricity. However, the simplicity of PV systems, including their lack of moving parts and minimal maintenance requirements, makes it easy for system owners to overlook the risks that are associated with installing a power generator on a rooftop. One of those risks includes the potential for electricity to arc across an unwanted gap in the PV system's electrical circuit, thereby creating an arc-fault.

"The risk of fire must be taken into account when evaluating any electrical system that operates at high voltages and high power levels, and rooftop solar PV systems are no exception," said Jay Holman, research manager, IDC Energy Insights. "Arc-faults pose the greatest fire risk. Detecting and extinguishing arc-faults in DC PV systems will require the development of new devices called DC PV Arc-Fault Circuit Interrupters (DC PV AFCIs), designed to detect the signature of an arc-fault in the current of a PV system and stop the current from flowing through the arc-fault."

The 2011 U.S. National Electric Code (NEC) includes a requirement for arc-fault protection in certain new rooftop PV systems. In response, solar industry vendors are already developing technologies that not only meet this requirement, but go beyond it and provide additional protection against PV system fires. However, efforts are being slowed by the lack of an industry standard against which to certify the new devices, as well as delayed adoption of the NEC by many states and jurisdictions. As a result, it could be months or years before the majority of new PV systems being installed in the US include these new protections.

"All too often, new fire safety requirements do not make it into the code until a tragic event raises awareness of risks to the national level. Arc-fault protection in rooftop PV systems serves as an example of how an industry can take proactive measures to prevent such tragedies from occurring," concluded Holman.

The IDC Energy Insights study details the different ways in which electrical systems can fail, the ways in which those failures can cause fires, and the steps to be taken to detect and mitigate those failures before a fire can occur. Comparisons are made between the well-documented risk of fires in household electrical distribution systems and the less understood risk of fires in rooftop solar PV systems. The report reviews additions to the U.S. 2011 National Electrical Code meant to address the risk of fire in certain types of rooftop PV systems and the impact of those changes on solar systems in the U.S. is assessed. Finally, recommendations are made for solar industry vendors and solar PV system owners who must comply with the new requirements of the U.S. National Electric Code.

The IDC Energy Insights Clean Energy Outlook conference is an invitation-only forum that distills the latest happenings in distributed and renewable energy. It brings together industry leaders with diverse views to discuss current and future market scenarios, the competitive landscape, and end-user experiences with information technology in these dynamic markets.

For additional information about this study, or to arrange a one-on-one briefing with Jay Holman, please contact Sarah Murray at 781-794-3214 or Reports are available to qualified members of the media. For information on purchasing reports, contact; reporters should email

About IDC Energy Insights

IDC Energy Insights provides research-based advisory and consulting services focused on market and technology developments in the energy and utility industries. Staffed by senior analysts with decades of industry experience, IDC Energy Insights covers both the utility and oil & gas segments, providing independent, timely, and relevant analysis focused on key business and technology issues. IDC Energy Insights serves a diverse and growing global client base, including electric, gas and water utilities, IT suppliers, independent power producers, retail energy providers, oil and gas companies, equipment manufacturers, government agencies, financial institutions, and professional services firms. International Data Corporation (IDC) is the premier global provider of market intelligence, advisory services, and events for the information technology market. IDC is a subsidiary of IDG, the world’s leading technology, media, research, and events company. For more information, please visit [], email, or call 508-935-4400. Visit the IDC Energy Insights Community at [].



Recent News

If you would like to interview an IDG employee or quote an article in your news coverage please fill out the form below: