30 Oct '16, 11am

Ungrounded PV Systems | Home Power Magazine

Ungrounded PV Systems | Home Power Magazine

Manufacturers are rapidly bringing to market lighter weight, more efficient, and space-saving transformerless inverters for use with ungrounded PV power systems. And when these systems are properly installed, their safety is equal or superior to grounded PV systems. Transformerless inverters—inverters that must be installed with ungrounded PV power systems—are becoming more common in the United States. The differences between ungrounded and grounded systems need to be clearly defined and understood for two important reasons: first, because the National Electrical Code (NEC) sets installation requirements that vary depending upon whether a system is grounded or not; and second, so that the safe functionality of ungrounded systems is not in doubt. A common misconception about ungrounded PV systems is that they lack all grounding, including equipment grounding—the bonding to ...

Full article: http://www.homepower.com/articles/solar-electricity/desig...

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